From 664a717d3ac5871efc1fd3bb5a32c552dc339d3f Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Wed, 2 Jun 2010 12:57:58 -0700
Subject: cciss: enqueue and submit io

Clean up some code where we subit our io.  The same 5 lines appeared
several times.  Also helps for a following patch.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 38 +++++++++++++++-----------------------
 1 file changed, 15 insertions(+), 23 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 51ceaee98f9f..6db790c2802f 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -257,6 +257,17 @@ static inline void removeQ(CommandList_struct *c)
 	hlist_del_init(&c->list);
 }
 
+static void enqueue_cmd_and_start_io(ctlr_info_t *h,
+	CommandList_struct *c)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&h->lock, flags);
+	addQ(&h->reqQ, c);
+	h->Qdepth++;
+	start_io(h);
+	spin_unlock_irqrestore(&h->lock, flags);
+}
+
 static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
 	int nr_cmds)
 {
@@ -1377,7 +1388,6 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			CommandList_struct *c;
 			char *buff = NULL;
 			u64bit temp64;
-			unsigned long flags;
 			DECLARE_COMPLETION_ONSTACK(wait);
 
 			if (!arg)
@@ -1449,13 +1459,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			}
 			c->waiting = &wait;
 
-			/* Put the request on the tail of the request queue */
-			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-			addQ(&host->reqQ, c);
-			host->Qdepth++;
-			start_io(host);
-			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
-
+			enqueue_cmd_and_start_io(host, c);
 			wait_for_completion(&wait);
 
 			/* unlock the buffers from DMA */
@@ -1495,7 +1499,6 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned char **buff = NULL;
 			int *buff_size = NULL;
 			u64bit temp64;
-			unsigned long flags;
 			BYTE sg_used = 0;
 			int status = 0;
 			int i;
@@ -1602,12 +1605,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				}
 			}
 			c->waiting = &wait;
-			/* Put the request on the tail of the request queue */
-			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-			addQ(&host->reqQ, c);
-			host->Qdepth++;
-			start_io(host);
-			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+			enqueue_cmd_and_start_io(host, c);
 			wait_for_completion(&wait);
 			/* unlock the buffers from DMA */
 			for (i = 0; i < sg_used; i++) {
@@ -1729,8 +1727,8 @@ static void cciss_softirq_done(struct request *rq)
 	CommandList_struct *cmd = rq->completion_data;
 	ctlr_info_t *h = hba[cmd->ctlr];
 	SGDescriptor_struct *curr_sg = cmd->SG;
-	unsigned long flags;
 	u64bit temp64;
+	unsigned long flags;
 	int i, ddir;
 	int sg_index = 0;
 
@@ -2679,17 +2677,11 @@ static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
 {
 	DECLARE_COMPLETION_ONSTACK(wait);
 	u64bit buff_dma_handle;
-	unsigned long flags;
 	int return_status = IO_OK;
 
 resend_cmd2:
 	c->waiting = &wait;
-	/* Put the request on the tail of the queue and send it */
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
-	addQ(&h->reqQ, c);
-	h->Qdepth++;
-	start_io(h);
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	enqueue_cmd_and_start_io(h, c);
 
 	wait_for_completion(&wait);
 
-- 
cgit v1.2.3


From 0c2b39087c900bdb240b50ac95ee9da00d844565 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Wed, 2 Jun 2010 12:58:00 -0700
Subject: cciss: clean up interrupt handler

Simplify the interrupt handler code to more closely match hpsa and to
hopefully make it easier to follow.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 236 ++++++++++++++++++++++++++++++--------------------
 1 file changed, 141 insertions(+), 95 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 6db790c2802f..cae6a1383282 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -167,7 +167,8 @@ static DEFINE_MUTEX(scan_mutex);
 static LIST_HEAD(scan_q);
 
 static void do_cciss_request(struct request_queue *q);
-static irqreturn_t do_cciss_intr(int irq, void *dev_id);
+static irqreturn_t do_cciss_intx(int irq, void *dev_id);
+static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
 static int cciss_open(struct block_device *bdev, fmode_t mode);
 static int cciss_release(struct gendisk *disk, fmode_t mode);
 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
@@ -197,7 +198,6 @@ static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
 	int attempt_retry);
 static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
 
-static void fail_all_cmds(unsigned long ctlr);
 static int add_to_scan_list(struct ctlr_info *h);
 static int scan_thread(void *data);
 static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
@@ -3124,6 +3124,34 @@ after_error_processing:
 	blk_complete_request(cmd->rq);
 }
 
+static inline u32 cciss_tag_contains_index(u32 tag)
+{
+#define DIRECT_LOOKUP_BIT 0x04
+	return tag & DIRECT_LOOKUP_BIT;
+}
+
+static inline u32 cciss_tag_to_index(u32 tag)
+{
+#define DIRECT_LOOKUP_SHIFT 3
+	return tag >> DIRECT_LOOKUP_SHIFT;
+}
+
+static inline u32 cciss_tag_discard_error_bits(u32 tag)
+{
+#define CCISS_ERROR_BITS 0x03
+	return tag & ~CCISS_ERROR_BITS;
+}
+
+static inline void cciss_mark_tag_indexed(u32 *tag)
+{
+	*tag |= DIRECT_LOOKUP_BIT;
+}
+
+static inline void cciss_set_tag_index(u32 *tag, u32 index)
+{
+	*tag |= (index << DIRECT_LOOKUP_SHIFT);
+}
+
 /*
  * Get a request and submit it to the controller.
  */
@@ -3172,8 +3200,8 @@ static void do_cciss_request(struct request_queue *q)
 	/* got command from pool, so use the command block index instead */
 	/* for direct lookups. */
 	/* The first 2 bits are reserved for controller error reporting. */
-	c->Header.Tag.lower = (c->cmdindex << 3);
-	c->Header.Tag.lower |= 0x04;	/* flag for direct lookup. */
+	cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
+	cciss_mark_tag_indexed(&c->Header.Tag.lower);
 	memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
 	c->Request.CDBLen = 10;	/* 12 byte commands not in FW yet; */
 	c->Request.Type.Type = TYPE_CMD;	/* It is a command. */
@@ -3306,15 +3334,73 @@ static inline int interrupt_pending(ctlr_info_t *h)
 static inline long interrupt_not_for_us(ctlr_info_t *h)
 {
 	return (((h->access.intr_pending(h) == 0) ||
-		 (h->interrupts_enabled == 0)));
+		(h->interrupts_enabled == 0)));
 }
 
-static irqreturn_t do_cciss_intr(int irq, void *dev_id)
+static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
+			u32 raw_tag)
 {
-	ctlr_info_t *h = dev_id;
+	if (unlikely(tag_index >= h->nr_cmds)) {
+		dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
+		return 1;
+	}
+	return 0;
+}
+
+static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
+				u32 raw_tag)
+{
+	removeQ(c);
+	if (likely(c->cmd_type == CMD_RWREQ))
+		complete_command(h, c, 0);
+	else if (c->cmd_type == CMD_IOCTL_PEND)
+		complete(c->waiting);
+#ifdef CONFIG_CISS_SCSI_TAPE
+	else if (c->cmd_type == CMD_SCSI)
+		complete_scsi_command(c, 0, raw_tag);
+#endif
+}
+
+/* process completion of an indexed ("direct lookup") command */
+static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
+{
+	u32 tag_index;
 	CommandList_struct *c;
+
+	tag_index = cciss_tag_to_index(raw_tag);
+	if (bad_tag(h, tag_index, raw_tag))
+		return get_next_completion(h);
+	c = h->cmd_pool + tag_index;
+	finish_cmd(h, c, raw_tag);
+	return get_next_completion(h);
+}
+
+/* process completion of a non-indexed command */
+static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
+{
+	u32 tag;
+	CommandList_struct *c = NULL;
+	struct hlist_node *tmp;
+	__u32 busaddr_masked, tag_masked;
+
+	tag = cciss_tag_discard_error_bits(raw_tag);
+	hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
+		busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
+		tag_masked = cciss_tag_discard_error_bits(tag);
+		if (busaddr_masked == tag_masked) {
+			finish_cmd(h, c, raw_tag);
+			return get_next_completion(h);
+		}
+	}
+	bad_tag(h, h->nr_cmds + 1, raw_tag);
+	return get_next_completion(h);
+}
+
+static irqreturn_t do_cciss_intx(int irq, void *dev_id)
+{
+	ctlr_info_t *h = dev_id;
 	unsigned long flags;
-	__u32 a, a1, a2;
+	u32 raw_tag;
 
 	if (interrupt_not_for_us(h))
 		return IRQ_NONE;
@@ -3324,50 +3410,41 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id)
 	 */
 	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
 	while (interrupt_pending(h)) {
-		while ((a = get_next_completion(h)) != FIFO_EMPTY) {
-			a1 = a;
-			if ((a & 0x04)) {
-				a2 = (a >> 3);
-				if (a2 >= h->nr_cmds) {
-					printk(KERN_WARNING
-					       "cciss: controller cciss%d failed, stopping.\n",
-					       h->ctlr);
-					spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
-					fail_all_cmds(h->ctlr);
-					return IRQ_HANDLED;
-				}
+		raw_tag = get_next_completion(h);
+		while (raw_tag != FIFO_EMPTY) {
+			if (cciss_tag_contains_index(raw_tag))
+				raw_tag = process_indexed_cmd(h, raw_tag);
+			else
+				raw_tag = process_nonindexed_cmd(h, raw_tag);
+		}
+	}
 
-				c = h->cmd_pool + a2;
-				a = c->busaddr;
+	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	return IRQ_HANDLED;
+}
 
-			} else {
-				struct hlist_node *tmp;
+/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
+ * check the interrupt pending register because it is not set.
+ */
+static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
+{
+	ctlr_info_t *h = dev_id;
+	unsigned long flags;
+	u32 raw_tag;
 
-				a &= ~3;
-				c = NULL;
-				hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
-					if (c->busaddr == a)
-						break;
-				}
-			}
-			/*
-			 * If we've found the command, take it off the
-			 * completion Q and free it
-			 */
-			if (c && c->busaddr == a) {
-				removeQ(c);
-				if (c->cmd_type == CMD_RWREQ) {
-					complete_command(h, c, 0);
-				} else if (c->cmd_type == CMD_IOCTL_PEND) {
-					complete(c->waiting);
-				}
-#				ifdef CONFIG_CISS_SCSI_TAPE
-				else if (c->cmd_type == CMD_SCSI)
-					complete_scsi_command(c, 0, a1);
-#				endif
-				continue;
-			}
-		}
+	if (interrupt_not_for_us(h))
+		return IRQ_NONE;
+	/*
+	 * If there are completed commands in the completion queue,
+	 * we had better do something about it.
+	 */
+	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	raw_tag = get_next_completion(h);
+	while (raw_tag != FIFO_EMPTY) {
+		if (cciss_tag_contains_index(raw_tag))
+			raw_tag = process_indexed_cmd(h, raw_tag);
+		else
+			raw_tag = process_nonindexed_cmd(h, raw_tag);
 	}
 
 	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
@@ -4230,11 +4307,21 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 
 	/* make sure the board interrupts are off */
 	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
-	if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
-			IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
-		printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
-		       hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
-		goto clean2;
+	if (hba[i]->msi_vector || hba[i]->msix_vector) {
+		if (request_irq(hba[i]->intr[SIMPLE_MODE_INT],
+				do_cciss_msix_intr,
+				IRQF_DISABLED, hba[i]->devname, hba[i])) {
+			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
+			       hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
+			goto clean2;
+		}
+	} else {
+		if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intx,
+				IRQF_DISABLED, hba[i]->devname, hba[i])) {
+			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
+			       hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
+			goto clean2;
+		}
 	}
 
 	printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
@@ -4534,46 +4621,5 @@ static void __exit cciss_cleanup(void)
 	bus_unregister(&cciss_bus_type);
 }
 
-static void fail_all_cmds(unsigned long ctlr)
-{
-	/* If we get here, the board is apparently dead. */
-	ctlr_info_t *h = hba[ctlr];
-	CommandList_struct *c;
-	unsigned long flags;
-
-	printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
-	h->alive = 0;		/* the controller apparently died... */
-
-	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-
-	pci_disable_device(h->pdev);	/* Make sure it is really dead. */
-
-	/* move everything off the request queue onto the completed queue */
-	while (!hlist_empty(&h->reqQ)) {
-		c = hlist_entry(h->reqQ.first, CommandList_struct, list);
-		removeQ(c);
-		h->Qdepth--;
-		addQ(&h->cmpQ, c);
-	}
-
-	/* Now, fail everything on the completed queue with a HW error */
-	while (!hlist_empty(&h->cmpQ)) {
-		c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
-		removeQ(c);
-		if (c->cmd_type != CMD_MSG_STALE)
-			c->err_info->CommandStatus = CMD_HARDWARE_ERR;
-		if (c->cmd_type == CMD_RWREQ) {
-			complete_command(h, c, 0);
-		} else if (c->cmd_type == CMD_IOCTL_PEND)
-			complete(c->waiting);
-#ifdef CONFIG_CISS_SCSI_TAPE
-		else if (c->cmd_type == CMD_SCSI)
-			complete_scsi_command(c, 0, 0);
-#endif
-	}
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
-	return;
-}
-
 module_init(cciss_init);
 module_exit(cciss_cleanup);
-- 
cgit v1.2.3


From 2cf3af1c9ec26f8db3f386e48f9d979ad8bb3eff Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Wed, 2 Jun 2010 12:58:02 -0700
Subject: cciss: check for msi in interrupt_not_for_us

Check to see if h->msi[x]_vector is set.  We need this for a following
patch.  Without this check we process one interrupt then stop because in
msi[x] mode the interrupt pending bit is not set.  Not sure why we didn't
encounter this before.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index cae6a1383282..cd830cb64a5d 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3333,8 +3333,9 @@ static inline int interrupt_pending(ctlr_info_t *h)
 
 static inline long interrupt_not_for_us(ctlr_info_t *h)
 {
-	return (((h->access.intr_pending(h) == 0) ||
-		(h->interrupts_enabled == 0)));
+	return !(h->msi_vector || h->msix_vector) &&
+		((h->access.intr_pending(h) == 0) ||
+		(h->interrupts_enabled == 0));
 }
 
 static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
-- 
cgit v1.2.3


From 1d1414419f034702bf587accdf2a9ac53245e000 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Wed, 2 Jun 2010 12:58:04 -0700
Subject: cciss: make interrupt access methods return type bool

Change the return type of our interrupt access routines to bool from
unsigned long.  It makes more sense that way.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index c5d411174db0..c527932d223a 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -25,7 +25,7 @@ struct access_method {
 	void (*submit_command)(ctlr_info_t *h, CommandList_struct *c);
 	void (*set_intr_mask)(ctlr_info_t *h, unsigned long val);
 	unsigned long (*fifo_full)(ctlr_info_t *h);
-	unsigned long (*intr_pending)(ctlr_info_t *h);
+	bool (*intr_pending)(ctlr_info_t *h);
 	unsigned long (*command_completed)(ctlr_info_t *h);
 };
 typedef struct _drive_info_struct
@@ -253,7 +253,7 @@ static unsigned long SA5_completed(ctlr_info_t *h)
 /*
  *	Returns true if an interrupt is pending.. 
  */
-static unsigned long SA5_intr_pending(ctlr_info_t *h)
+static bool SA5_intr_pending(ctlr_info_t *h)
 {
 	unsigned long register_value  = 
 		readl(h->vaddr + SA5_INTR_STATUS);
@@ -268,7 +268,7 @@ static unsigned long SA5_intr_pending(ctlr_info_t *h)
 /*
  *      Returns true if an interrupt is pending..
  */
-static unsigned long SA5B_intr_pending(ctlr_info_t *h)
+static bool SA5B_intr_pending(ctlr_info_t *h)
 {
         unsigned long register_value  =
                 readl(h->vaddr + SA5_INTR_STATUS);
-- 
cgit v1.2.3


From 5e216153c34ac21781110795284a784037f808e3 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Wed, 2 Jun 2010 12:58:06 -0700
Subject: cciss: add performant mode support for Stars/Sirius

Add a mode of controller operation called Performant Mode.  Even though
cciss has been deprecated in favor of hpsa there are new controllers due
out next year that HP must support in older vendor distros.  Vendors
require all fixes/features be upstream.  These new controllers support
only 16 commands in simple mode but support up to 1024 in performant mode.
This requires us to add this support at this late date.

The performant mode transport minimizes host PCI accesses by performinf
many completions per read.  PCI writes are posted so the host can write
then immediately get off the bus not waiting for the writwe to complete to
the target.  In the context of performant mode the host read out to a
controller pulls all posted writes into host memory ensuring the reply
queue is coherent.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c      | 267 ++++++++++++++++++++++++++++++++++++---------
 drivers/block/cciss.h      | 109 +++++++++++++++++-
 drivers/block/cciss_cmd.h  |  34 +++++-
 drivers/block/cciss_scsi.c |   6 +-
 4 files changed, 353 insertions(+), 63 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index cd830cb64a5d..08a2e619dc36 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -206,6 +206,11 @@ static void cciss_device_release(struct device *dev);
 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
 
+/* performant mode helper functions */
+static void  calc_bucket_map(int *bucket, int num_buckets, int nsgs,
+				int *bucket_map);
+static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
+
 #ifdef CONFIG_PROC_FS
 static void cciss_procinit(int i);
 #else
@@ -231,6 +236,16 @@ static const struct block_device_operations cciss_fops = {
 	.revalidate_disk = cciss_revalidate,
 };
 
+/* set_performant_mode: Modify the tag for cciss performant
+ * set bit 0 for pull model, bits 3-1 for block fetch
+ * register number
+ */
+static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
+{
+	if (likely(h->transMethod == CFGTBL_Trans_Performant))
+		c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
+}
+
 /*
  * Enqueuing and dequeuing functions for cmdlists.
  */
@@ -261,6 +276,7 @@ static void enqueue_cmd_and_start_io(ctlr_info_t *h,
 	CommandList_struct *c)
 {
 	unsigned long flags;
+	set_performant_mode(h, c);
 	spin_lock_irqsave(&h->lock, flags);
 	addQ(&h->reqQ, c);
 	h->Qdepth++;
@@ -350,6 +366,28 @@ static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 
 #ifdef CONFIG_PROC_FS
 
+static inline u32 next_command(ctlr_info_t *h)
+{
+	u32 a;
+
+	if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
+		return h->access.command_completed(h);
+
+	if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
+		a = *(h->reply_pool_head); /* Next cmd in ring buffer */
+		(h->reply_pool_head)++;
+		h->commands_outstanding--;
+	} else {
+		a = FIFO_EMPTY;
+	}
+	/* Check for wraparound */
+	if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
+		h->reply_pool_head = h->reply_pool;
+		h->reply_pool_wraparound ^= 1;
+	}
+	return a;
+}
+
 /*
  * Report information about this controller.
  */
@@ -377,7 +415,7 @@ static void cciss_seq_show_header(struct seq_file *seq)
 		h->product_name,
 		(unsigned long)h->board_id,
 		h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
-		h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
+		h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT],
 		h->num_luns,
 		h->Qdepth, h->commands_outstanding,
 		h->maxQsinceinit, h->max_outstanding, h->maxSG);
@@ -3126,13 +3164,13 @@ after_error_processing:
 
 static inline u32 cciss_tag_contains_index(u32 tag)
 {
-#define DIRECT_LOOKUP_BIT 0x04
+#define DIRECT_LOOKUP_BIT 0x10
 	return tag & DIRECT_LOOKUP_BIT;
 }
 
 static inline u32 cciss_tag_to_index(u32 tag)
 {
-#define DIRECT_LOOKUP_SHIFT 3
+#define DIRECT_LOOKUP_SHIFT 5
 	return tag >> DIRECT_LOOKUP_SHIFT;
 }
 
@@ -3262,9 +3300,12 @@ static void do_cciss_request(struct request_queue *q)
 			blk_rq_sectors(creq), seg, chained);
 #endif				/* CCISS_DEBUG */
 
-	c->Header.SGList = c->Header.SGTotal = seg + chained;
-	if (seg > h->max_cmd_sgentries)
+	c->Header.SGTotal = seg + chained;
+	if (seg <= h->max_cmd_sgentries)
+		c->Header.SGList = c->Header.SGTotal;
+	else
 		c->Header.SGList = h->max_cmd_sgentries;
+	set_performant_mode(h, c);
 
 	if (likely(blk_fs_request(creq))) {
 		if(h->cciss_read == CCISS_READ_10) {
@@ -3370,10 +3411,10 @@ static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
 
 	tag_index = cciss_tag_to_index(raw_tag);
 	if (bad_tag(h, tag_index, raw_tag))
-		return get_next_completion(h);
+		return next_command(h);
 	c = h->cmd_pool + tag_index;
 	finish_cmd(h, c, raw_tag);
-	return get_next_completion(h);
+	return next_command(h);
 }
 
 /* process completion of a non-indexed command */
@@ -3390,11 +3431,11 @@ static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
 		tag_masked = cciss_tag_discard_error_bits(tag);
 		if (busaddr_masked == tag_masked) {
 			finish_cmd(h, c, raw_tag);
-			return get_next_completion(h);
+			return next_command(h);
 		}
 	}
 	bad_tag(h, h->nr_cmds + 1, raw_tag);
-	return get_next_completion(h);
+	return next_command(h);
 }
 
 static irqreturn_t do_cciss_intx(int irq, void *dev_id)
@@ -3700,6 +3741,155 @@ static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
 	return -1;
 }
 
+/* Fill in bucket_map[], given nsgs (the max number of
+ * scatter gather elements supported) and bucket[],
+ * which is an array of 8 integers.  The bucket[] array
+ * contains 8 different DMA transfer sizes (in 16
+ * byte increments) which the controller uses to fetch
+ * commands.  This function fills in bucket_map[], which
+ * maps a given number of scatter gather elements to one of
+ * the 8 DMA transfer sizes.  The point of it is to allow the
+ * controller to only do as much DMA as needed to fetch the
+ * command, with the DMA transfer size encoded in the lower
+ * bits of the command address.
+ */
+static void  calc_bucket_map(int bucket[], int num_buckets,
+	int nsgs, int *bucket_map)
+{
+	int i, j, b, size;
+
+	/* even a command with 0 SGs requires 4 blocks */
+#define MINIMUM_TRANSFER_BLOCKS 4
+#define NUM_BUCKETS 8
+	/* Note, bucket_map must have nsgs+1 entries. */
+	for (i = 0; i <= nsgs; i++) {
+		/* Compute size of a command with i SG entries */
+		size = i + MINIMUM_TRANSFER_BLOCKS;
+		b = num_buckets; /* Assume the biggest bucket */
+		/* Find the bucket that is just big enough */
+		for (j = 0; j < 8; j++) {
+			if (bucket[j] >= size) {
+				b = j;
+				break;
+			}
+		}
+		/* for a command with i SG entries, use bucket b. */
+		bucket_map[i] = b;
+	}
+}
+
+static void
+cciss_put_controller_into_performant_mode(ctlr_info_t *h)
+{
+	int l = 0;
+	__u32 trans_support;
+	__u32 trans_offset;
+			/*
+			 *  5 = 1 s/g entry or 4k
+			 *  6 = 2 s/g entry or 8k
+			 *  8 = 4 s/g entry or 16k
+			 * 10 = 6 s/g entry or 24k
+			 */
+	int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
+	unsigned long register_value;
+
+	BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
+
+	/* Attempt to put controller into performant mode if supported */
+	/* Does board support performant mode? */
+	trans_support = readl(&(h->cfgtable->TransportSupport));
+	if (!(trans_support & PERFORMANT_MODE))
+		return;
+
+	printk(KERN_WARNING "cciss%d: Placing controller into "
+				"performant mode\n", h->ctlr);
+	/* Performant mode demands commands on a 32 byte boundary
+	 * pci_alloc_consistent aligns on page boundarys already.
+	 * Just need to check if divisible by 32
+	 */
+	if ((sizeof(CommandList_struct) % 32) != 0) {
+		printk(KERN_WARNING "%s %d %s\n",
+			"cciss info: command size[",
+			(int)sizeof(CommandList_struct),
+			"] not divisible by 32, no performant mode..\n");
+		return;
+	}
+
+	/* Performant mode ring buffer and supporting data structures */
+	h->reply_pool = (__u64 *)pci_alloc_consistent(
+		h->pdev, h->max_commands * sizeof(__u64),
+		&(h->reply_pool_dhandle));
+
+	/* Need a block fetch table for performant mode */
+	h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
+		sizeof(__u32)), GFP_KERNEL);
+
+	if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
+		goto clean_up;
+
+	h->reply_pool_wraparound = 1; /* spec: init to 1 */
+
+	/* Controller spec: zero out this buffer. */
+	memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
+	h->reply_pool_head = h->reply_pool;
+
+	trans_offset = readl(&(h->cfgtable->TransMethodOffset));
+	calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
+				h->blockFetchTable);
+	writel(bft[0], &h->transtable->BlockFetch0);
+	writel(bft[1], &h->transtable->BlockFetch1);
+	writel(bft[2], &h->transtable->BlockFetch2);
+	writel(bft[3], &h->transtable->BlockFetch3);
+	writel(bft[4], &h->transtable->BlockFetch4);
+	writel(bft[5], &h->transtable->BlockFetch5);
+	writel(bft[6], &h->transtable->BlockFetch6);
+	writel(bft[7], &h->transtable->BlockFetch7);
+
+	/* size of controller ring buffer */
+	writel(h->max_commands, &h->transtable->RepQSize);
+	writel(1, &h->transtable->RepQCount);
+	writel(0, &h->transtable->RepQCtrAddrLow32);
+	writel(0, &h->transtable->RepQCtrAddrHigh32);
+	writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
+	writel(0, &h->transtable->RepQAddr0High32);
+	writel(CFGTBL_Trans_Performant,
+			&(h->cfgtable->HostWrite.TransportRequest));
+
+	h->transMethod = CFGTBL_Trans_Performant;
+	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
+	/* under certain very rare conditions, this can take awhile.
+	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
+	 * as we enter this code.) */
+	for (l = 0; l < MAX_CONFIG_WAIT; l++) {
+		register_value = readl(h->vaddr + SA5_DOORBELL);
+		if (!(register_value & CFGTBL_ChangeReq))
+			break;
+		/* delay and try again */
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(10);
+	}
+	register_value = readl(&(h->cfgtable->TransportActive));
+	if (!(register_value & CFGTBL_Trans_Performant)) {
+		printk(KERN_WARNING "cciss: unable to get board into"
+					" performant mode\n");
+		return;
+	}
+
+	/* Change the access methods to the performant access methods */
+	h->access = SA5_performant_access;
+
+	return;
+clean_up:
+	kfree(h->blockFetchTable);
+	if (h->reply_pool)
+		pci_free_consistent(h->pdev,
+				h->max_commands * sizeof(__u64),
+				h->reply_pool,
+				h->reply_pool_dhandle);
+	return;
+
+} /* cciss_put_controller_into_performant_mode */
+
 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
  * controllers that are capable. If not, we use IO-APIC mode.
  */
@@ -3749,7 +3939,7 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
 default_int_mode:
 #endif				/* CONFIG_PCI_MSI */
 	/* if we get here we're going to use the default interrupt mode */
-	c->intr[SIMPLE_MODE_INT] = pdev->irq;
+	c->intr[PERF_MODE_INT] = pdev->irq;
 	return;
 }
 
@@ -3761,6 +3951,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	__u32 cfg_base_addr;
 	__u64 cfg_base_addr_index;
 	int i, prod_index, err;
+	__u32 trans_offset;
 
 	subsystem_vendor_id = pdev->subsystem_vendor;
 	subsystem_device_id = pdev->subsystem_device;
@@ -3874,11 +4065,16 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
 						       cfg_base_addr_index) +
 				    cfg_offset, sizeof(CfgTable_struct));
+	/* Find performant mode table. */
+	trans_offset = readl(&(c->cfgtable->TransMethodOffset));
+	c->transtable = remap_pci_mem(pci_resource_start(pdev,
+		cfg_base_addr_index) + cfg_offset+trans_offset,
+		sizeof(*c->transtable));
 	c->board_id = board_id;
 
-#ifdef CCISS_DEBUG
-	print_cfg_table(c->cfgtable);
-#endif				/* CCISS_DEBUG */
+	#ifdef CCISS_DEBUG
+		print_cfg_table(c->cfgtable);
+	#endif				/* CCISS_DEBUG */
 
 	/* Some controllers support Zero Memory Raid (ZMR).
 	 * When configured in ZMR mode the number of supported
@@ -3888,7 +4084,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	 * are supported on the controller then subtract 4 to
 	 * leave a little room for ioctl calls.
 	 */
-	c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
+	c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands));
 	c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
 
 	/*
@@ -3933,7 +4129,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	 * kernels revealed a bug in the refetch if dom0 resides on a P600.
 	 */
 	if(board_id == 0x3225103C) {
-		__u32 dma_prefetch;
+			__u32 dma_prefetch;
 		__u32 dma_refetch;
 		dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
 		dma_prefetch |= 0x8000;
@@ -3944,38 +4140,8 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	}
 
 #ifdef CCISS_DEBUG
-	printk("Trying to put board into Simple mode\n");
+	printk(KERN_WARNING "Trying to put board into Performant mode\n");
 #endif				/* CCISS_DEBUG */
-	c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
-	/* Update the field, and then ring the doorbell */
-	writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
-	writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
-
-	/* under certain very rare conditions, this can take awhile.
-	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
-	 * as we enter this code.) */
-	for (i = 0; i < MAX_CONFIG_WAIT; i++) {
-		if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
-			break;
-		/* delay and try again */
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(msecs_to_jiffies(1));
-	}
-
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "I counter got to %d %x\n", i,
-	       readl(c->vaddr + SA5_DOORBELL));
-#endif				/* CCISS_DEBUG */
-#ifdef CCISS_DEBUG
-	print_cfg_table(c->cfgtable);
-#endif				/* CCISS_DEBUG */
-
-	if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
-		printk(KERN_WARNING "cciss: unable to get board into"
-		       " simple mode\n");
-		err = -ENODEV;
-		goto err_out_free_res;
-	}
 	return 0;
 
 err_out_free_res:
@@ -3984,6 +4150,7 @@ err_out_free_res:
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
 	pci_release_regions(pdev);
+	cciss_put_controller_into_performant_mode(c);
 	return err;
 }
 
@@ -4260,7 +4427,6 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	i = alloc_cciss_hba();
 	if (i < 0)
 		return -1;
-
 	hba[i]->busy_initializing = 1;
 	INIT_HLIST_HEAD(&hba[i]->cmpQ);
 	INIT_HLIST_HEAD(&hba[i]->reqQ);
@@ -4327,7 +4493,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 
 	printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
 	       hba[i]->devname, pdev->device, pci_name(pdev),
-	       hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
+	       hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
 
 	hba[i]->cmd_pool_bits =
 	    kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
@@ -4433,7 +4599,7 @@ clean4:
 				    hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
 				    hba[i]->errinfo_pool,
 				    hba[i]->errinfo_pool_dhandle);
-	free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
+	free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
 clean2:
 	unregister_blkdev(hba[i]->major, hba[i]->devname);
 clean1:
@@ -4475,7 +4641,7 @@ static void cciss_shutdown(struct pci_dev *pdev)
 		printk(KERN_WARNING "cciss%d: Error flushing cache\n",
 			h->ctlr);
 	h->access.set_intr_mask(h, CCISS_INTR_OFF);
-	free_irq(h->intr[2], h);
+	free_irq(h->intr[PERF_MODE_INT], h);
 }
 
 static void __devexit cciss_remove_one(struct pci_dev *pdev)
@@ -4575,7 +4741,6 @@ static int __init cciss_init(void)
 	 * array of them, the size must be a multiple of 8 bytes.
 	 */
 	BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
-
 	printk(KERN_INFO DRIVER_NAME "\n");
 
 	err = bus_register(&cciss_bus_type);
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index c527932d223a..8a9f5b58daa8 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -85,8 +85,8 @@ struct ctlr_info
 	int	max_cmd_sgentries;
 	SGDescriptor_struct **cmd_sg_list;
 
-#	define DOORBELL_INT	0
-#	define PERF_MODE_INT	1
+#	define PERF_MODE_INT	0
+#	define DOORBELL_INT	1
 #	define SIMPLE_MODE_INT	2
 #	define MEMQ_MODE_INT	3
 	unsigned int intr[4];
@@ -137,10 +137,27 @@ struct ctlr_info
 	struct list_head scan_list;
 	struct completion scan_wait;
 	struct device dev;
+	/*
+	 * Performant mode tables.
+	 */
+	u32 trans_support;
+	u32 trans_offset;
+	struct TransTable_struct *transtable;
+	unsigned long transMethod;
+
+	/*
+	 * Performant mode completion buffer
+	 */
+	u64 *reply_pool;
+	dma_addr_t reply_pool_dhandle;
+	u64 *reply_pool_head;
+	size_t reply_pool_size;
+	unsigned char reply_pool_wraparound;
+	u32 *blockFetchTable;
 };
 
-/*  Defining the diffent access_menthods */
-/*
+/*  Defining the diffent access_methods
+ *
  * Memory mapped FIFO interface (SMART 53xx cards)
  */
 #define SA5_DOORBELL	0x20
@@ -159,6 +176,15 @@ struct ctlr_info
 #define SA5B_INTR_PENDING	0x04
 #define FIFO_EMPTY		0xffffffff	
 #define CCISS_FIRMWARE_READY	0xffff0000 /* value in scratchpad register */
+/* Perf. mode flags */
+#define SA5_PERF_INTR_PENDING	0x04
+#define SA5_PERF_INTR_OFF	0x05
+#define SA5_OUTDB_STATUS_PERF_BIT	0x01
+#define SA5_OUTDB_CLEAR_PERF_BIT	0x01
+#define SA5_OUTDB_CLEAR         0xA0
+#define SA5_OUTDB_CLEAR_PERF_BIT        0x01
+#define SA5_OUTDB_STATUS        0x9C
+
 
 #define  CISS_ERROR_BIT		0x02
 
@@ -170,8 +196,9 @@ struct ctlr_info
 static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c) 
 {
 #ifdef CCISS_DEBUG
-	 printk("Sending %x - down to controller\n", c->busaddr );
-#endif /* CCISS_DEBUG */ 
+	printk(KERN_WARNING "cciss%d: Sending %08x - down to controller\n",
+			h->ctlr, c->busaddr);
+#endif /* CCISS_DEBUG */
          writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 	 h->commands_outstanding++;
 	 if ( h->commands_outstanding > h->max_outstanding)
@@ -214,6 +241,20 @@ static void SA5B_intr_mask(ctlr_info_t *h, unsigned long val)
                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
         }
 }
+
+/* Performant mode intr_mask */
+static void SA5_performant_intr_mask(ctlr_info_t *h, unsigned long val)
+{
+	if (val) { /* turn on interrupts */
+		h->interrupts_enabled = 1;
+		writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+	} else {
+		h->interrupts_enabled = 0;
+		writel(SA5_PERF_INTR_OFF,
+				h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
+	}
+}
+
 /*
  *  Returns true if fifo is full.  
  * 
@@ -250,6 +291,40 @@ static unsigned long SA5_completed(ctlr_info_t *h)
 	return ( register_value); 
 
 }
+
+/* Performant mode command completed */
+static unsigned long SA5_performant_completed(ctlr_info_t *h)
+{
+	unsigned long register_value = FIFO_EMPTY;
+
+	/* flush the controller write of the reply queue by reading
+	 * outbound doorbell status register.
+	 */
+	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
+	/* msi auto clears the interrupt pending bit. */
+	if (!(h->msi_vector || h->msix_vector)) {
+		writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
+		/* Do a read in order to flush the write to the controller
+		 * (as per spec.)
+		 */
+		register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
+	}
+
+	if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
+		register_value = *(h->reply_pool_head);
+		(h->reply_pool_head)++;
+		h->commands_outstanding--;
+	} else {
+		register_value = FIFO_EMPTY;
+	}
+	/* Check for wraparound */
+	if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
+		h->reply_pool_head = h->reply_pool;
+		h->reply_pool_wraparound ^= 1;
+	}
+
+	return register_value;
+}
 /*
  *	Returns true if an interrupt is pending.. 
  */
@@ -280,6 +355,20 @@ static bool SA5B_intr_pending(ctlr_info_t *h)
         return 0 ;
 }
 
+static bool SA5_performant_intr_pending(ctlr_info_t *h)
+{
+	unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
+
+	if (!register_value)
+		return false;
+
+	if (h->msi_vector || h->msix_vector)
+		return true;
+
+	/* Read outbound doorbell to flush */
+	register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
+	return register_value & SA5_OUTDB_STATUS_PERF_BIT;
+}
 
 static struct access_method SA5_access = {
 	SA5_submit_command,
@@ -297,6 +386,14 @@ static struct access_method SA5B_access = {
         SA5_completed,
 };
 
+static struct access_method SA5_performant_access = {
+	SA5_submit_command,
+	SA5_performant_intr_mask,
+	SA5_fifo_full,
+	SA5_performant_intr_pending,
+	SA5_performant_completed,
+};
+
 struct board_type {
 	__u32	board_id;
 	char	*product_name;
diff --git a/drivers/block/cciss_cmd.h b/drivers/block/cciss_cmd.h
index e624ff959cb6..eda6a8e6b600 100644
--- a/drivers/block/cciss_cmd.h
+++ b/drivers/block/cciss_cmd.h
@@ -54,6 +54,7 @@
 #define CFGTBL_AccCmds          0x00000001l
 
 #define CFGTBL_Trans_Simple     0x00000002l
+#define CFGTBL_Trans_Performant 0x00000004l
 
 #define CFGTBL_BusType_Ultra2   0x00000001l
 #define CFGTBL_BusType_Ultra3   0x00000002l
@@ -173,12 +174,15 @@ typedef struct _SGDescriptor_struct {
  * PAD_64 can be adjusted independently as needed for 32-bit
  * and 64-bits systems.
  */
-#define COMMANDLIST_ALIGNMENT (8)
+#define COMMANDLIST_ALIGNMENT (32)
 #define IS_64_BIT ((sizeof(long) - 4)/4)
 #define IS_32_BIT (!IS_64_BIT)
-#define PAD_32 (0)
+#define PAD_32 (32)
 #define PAD_64 (4)
 #define PADSIZE (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
+#define DIRECT_LOOKUP_BIT 0x10
+#define DIRECT_LOOKUP_SHIFT 5
+
 typedef struct _CommandList_struct {
   CommandListHeader_struct Header;
   RequestBlock_struct      Request;
@@ -195,7 +199,7 @@ typedef struct _CommandList_struct {
   struct completion *waiting;
   int	 retry_count;
   void * scsi_cmd;
-  char   pad[PADSIZE];
+  char pad[PADSIZE];
 } CommandList_struct;
 
 /* Configuration Table Structure */
@@ -209,12 +213,15 @@ typedef struct _HostWrite_struct {
 typedef struct _CfgTable_struct {
   BYTE             Signature[4];
   DWORD            SpecValence;
+#define SIMPLE_MODE	0x02
+#define PERFORMANT_MODE	0x04
+#define MEMQ_MODE	0x08
   DWORD            TransportSupport;
   DWORD            TransportActive;
   HostWrite_struct HostWrite;
   DWORD            CmdsOutMax;
   DWORD            BusTypes;
-  DWORD            Reserved; 
+  DWORD            TransMethodOffset;
   BYTE             ServerName[16];
   DWORD            HeartBeat;
   DWORD            SCSI_Prefetch;
@@ -222,6 +229,25 @@ typedef struct _CfgTable_struct {
   DWORD            MaxLogicalUnits;
   DWORD            MaxPhysicalDrives;
   DWORD            MaxPhysicalDrivesPerLogicalUnit;
+  DWORD            MaxPerformantModeCommands;
 } CfgTable_struct;
+
+struct TransTable_struct {
+  u32 BlockFetch0;
+  u32 BlockFetch1;
+  u32 BlockFetch2;
+  u32 BlockFetch3;
+  u32 BlockFetch4;
+  u32 BlockFetch5;
+  u32 BlockFetch6;
+  u32 BlockFetch7;
+  u32 RepQSize;
+  u32 RepQCount;
+  u32 RepQCtrAddrLow32;
+  u32 RepQCtrAddrHigh32;
+  u32 RepQAddr0Low32;
+  u32 RepQAddr0High32;
+};
+
 #pragma pack()	 
 #endif /* CCISS_CMD_H */
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 72dae92f3cab..48be47853737 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -93,8 +93,8 @@ static struct scsi_host_template cciss_driver_template = {
 
 #pragma pack(1)
 
-#define SCSI_PAD_32 0
-#define SCSI_PAD_64 0
+#define SCSI_PAD_32 8
+#define SCSI_PAD_64 8
 
 struct cciss_scsi_cmd_stack_elem_t {
 	CommandList_struct cmd;
@@ -213,6 +213,8 @@ scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
 
 	/* Check alignment, see cciss_cmd.h near CommandList_struct def. */
 	BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
+	/* printk(KERN_WARNING "cciss_scsi.c: 0x%08x 0x%08x 0x%08x\n",
+			0xdeadbeef, sizeof(*stk->pool), 0xbeefdead); */
 	/* pci_alloc_consistent guarantees 32-bit DMA address will be used */
 	stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
 		pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle);
-- 
cgit v1.2.3


From 841fdffdd382722d33579a6aa1487e8a4e526dbd Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Wed, 2 Jun 2010 12:58:09 -0700
Subject: cciss: new controller support and bump driver version

Add support for new controllers due out next year.  HP must continue to
support new controllers in older distros.  All vendors require support be
upstream.  These controllers support only 16 commands in simple mode but
can support up to 1024 in performant mode.  See patch 5/6/ We have no
marketing names yet.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 08a2e619dc36..5e215ff0a6bb 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -56,16 +56,14 @@
 #include <linux/kthread.h>
 
 #define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
-#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
-#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
+#define DRIVER_NAME "HP CISS Driver (v 3.6.26)"
+#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26)
 
 /* Embedded module documentation macros - see modules.h */
 MODULE_AUTHOR("Hewlett-Packard Company");
 MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
-MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
-			" SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
-			" Smart Array G2 Series SAS/SATA Controllers");
-MODULE_VERSION("3.6.20");
+MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
+MODULE_VERSION("3.6.26");
 MODULE_LICENSE("GPL");
 
 static int cciss_allow_hpsa;
@@ -107,6 +105,11 @@ static const struct pci_device_id cciss_pci_device_id[] = {
 	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
 	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
 	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
+	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3250},
+	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3251},
+	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3252},
+	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3253},
+	{PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3254},
 	{0,}
 };
 
@@ -146,6 +149,11 @@ static struct board_type products[] = {
 	{0x3249103C, "Smart Array P812", &SA5_access},
 	{0x324A103C, "Smart Array P712m", &SA5_access},
 	{0x324B103C, "Smart Array P711m", &SA5_access},
+	{0x3250103C, "Smart Array", &SA5_access},
+	{0x3251103C, "Smart Array", &SA5_access},
+	{0x3252103C, "Smart Array", &SA5_access},
+	{0x3253103C, "Smart Array", &SA5_access},
+	{0x3254103C, "Smart Array", &SA5_access},
 };
 
 /* How long to wait (in milliseconds) for board to go into simple mode */
-- 
cgit v1.2.3


From 256aea3fd3b5c43e8d05ce66eaf43def83773612 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Fri, 11 Jun 2010 13:13:14 +0200
Subject: cciss: make sure we request the performant mode irq

Make sure we register the performant mode interrupt Another blunder.
Seemed to work because the call to put_controller_into_performant_mode was
never called.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 5e215ff0a6bb..4f59f03f91ff 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4483,18 +4483,18 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	/* make sure the board interrupts are off */
 	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
 	if (hba[i]->msi_vector || hba[i]->msix_vector) {
-		if (request_irq(hba[i]->intr[SIMPLE_MODE_INT],
+		if (request_irq(hba[i]->intr[PERF_MODE_INT],
 				do_cciss_msix_intr,
 				IRQF_DISABLED, hba[i]->devname, hba[i])) {
 			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
-			       hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
+			       hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
 			goto clean2;
 		}
 	} else {
-		if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intx,
+		if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
 				IRQF_DISABLED, hba[i]->devname, hba[i])) {
 			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
-			       hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
+			       hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
 			goto clean2;
 		}
 	}
-- 
cgit v1.2.3


From b14aa6dcd083ad00fb416a93f76131734e6c3c17 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Fri, 11 Jun 2010 13:13:35 +0200
Subject: cciss: fix call to put_controller_in_performant_mode

call to put_controller_in_performant_mode was in the wrong place
The call inadvertently ended up in an error path.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 4f59f03f91ff..156ea365c14d 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4150,6 +4150,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 #ifdef CCISS_DEBUG
 	printk(KERN_WARNING "Trying to put board into Performant mode\n");
 #endif				/* CCISS_DEBUG */
+	cciss_put_controller_into_performant_mode(c);
 	return 0;
 
 err_out_free_res:
@@ -4158,7 +4159,6 @@ err_out_free_res:
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
 	pci_release_regions(pdev);
-	cciss_put_controller_into_performant_mode(c);
 	return err;
 }
 
-- 
cgit v1.2.3


From 29979a71227c46b2ed970b9d603d529c718e5fc8 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Fri, 11 Jun 2010 13:13:35 +0200
Subject: cciss: move next_command function from ifdef

The definition of next_command also ended up in wrong place It ended up
inside an "#ifdef CONFIG_PROCFS".  Already caught by Randy Dunlap and a
couple others.  Tried to put it somewhere that made sense.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 45 +++++++++++++++++++++++----------------------
 1 file changed, 23 insertions(+), 22 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 156ea365c14d..10a0268a1f92 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -213,6 +213,7 @@ static void cciss_hba_release(struct device *dev);
 static void cciss_device_release(struct device *dev);
 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
+static inline u32 next_command(ctlr_info_t *h);
 
 /* performant mode helper functions */
 static void  calc_bucket_map(int *bucket, int num_buckets, int nsgs,
@@ -374,28 +375,6 @@ static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 
 #ifdef CONFIG_PROC_FS
 
-static inline u32 next_command(ctlr_info_t *h)
-{
-	u32 a;
-
-	if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
-		return h->access.command_completed(h);
-
-	if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
-		a = *(h->reply_pool_head); /* Next cmd in ring buffer */
-		(h->reply_pool_head)++;
-		h->commands_outstanding--;
-	} else {
-		a = FIFO_EMPTY;
-	}
-	/* Check for wraparound */
-	if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
-		h->reply_pool_head = h->reply_pool;
-		h->reply_pool_wraparound ^= 1;
-	}
-	return a;
-}
-
 /*
  * Report information about this controller.
  */
@@ -3411,6 +3390,28 @@ static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
 #endif
 }
 
+static inline u32 next_command(ctlr_info_t *h)
+{
+	u32 a;
+
+	if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
+		return h->access.command_completed(h);
+
+	if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
+		a = *(h->reply_pool_head); /* Next cmd in ring buffer */
+		(h->reply_pool_head)++;
+		h->commands_outstanding--;
+	} else {
+		a = FIFO_EMPTY;
+	}
+	/* Check for wraparound */
+	if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
+		h->reply_pool_head = h->reply_pool;
+		h->reply_pool_wraparound ^= 1;
+	}
+	return a;
+}
+
 /* process completion of an indexed ("direct lookup") command */
 static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
 {
-- 
cgit v1.2.3


From b0dd5cad3a3297415f8205135d37f22da12b9083 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Fri, 11 Jun 2010 13:13:36 +0200
Subject: cciss: remove errant debug code

Remove a debug statement left behind by accident Ths debug statement got
left behind.  It was commented out after use but not deleted.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss_scsi.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 48be47853737..8e0a709286df 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -213,8 +213,6 @@ scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
 
 	/* Check alignment, see cciss_cmd.h near CommandList_struct def. */
 	BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
-	/* printk(KERN_WARNING "cciss_scsi.c: 0x%08x 0x%08x 0x%08x\n",
-			0xdeadbeef, sizeof(*stk->pool), 0xbeefdead); */
 	/* pci_alloc_consistent guarantees 32-bit DMA address will be used */
 	stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
 		pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle);
-- 
cgit v1.2.3


From f3bcb14332a5881c88f8cd16ed59f3fd0ae26e12 Mon Sep 17 00:00:00 2001
From: Mike Miller <mike.miller@hp.com>
Date: Fri, 11 Jun 2010 13:13:36 +0200
Subject: cciss: change pad value from 32 to 0

Change the command padding on 32-bit systems to 0 since setting it to 32
has the identical effect.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss_cmd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss_cmd.h b/drivers/block/cciss_cmd.h
index eda6a8e6b600..936b9666da6a 100644
--- a/drivers/block/cciss_cmd.h
+++ b/drivers/block/cciss_cmd.h
@@ -177,7 +177,7 @@ typedef struct _SGDescriptor_struct {
 #define COMMANDLIST_ALIGNMENT (32)
 #define IS_64_BIT ((sizeof(long) - 4)/4)
 #define IS_32_BIT (!IS_64_BIT)
-#define PAD_32 (32)
+#define PAD_32 (0)
 #define PAD_64 (4)
 #define PADSIZE (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
 #define DIRECT_LOOKUP_BIT 0x10
-- 
cgit v1.2.3


From 285203c8ff541a775f27148c06c58b96822d8b68 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: initialize debug jiffies offset

Set debug jiffies offset at initialization.  Avoids wierd values showing
up if debugging enabled.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 90c4038702da..0cb24f00c920 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4175,6 +4175,9 @@ static int __init floppy_init(void)
 	int i, unit, drive;
 	int err, dr;
 
+	set_debugt();
+	interruptjiffies = resultjiffies = jiffies;
+
 #if defined(CONFIG_PPC)
 	if (check_legacy_ioport(FDC1))
 		return -ENODEV;
-- 
cgit v1.2.3


From be7a12bb1a7dc185d5143e3ae434f8a855f66a31 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: remove unnecessary inlines

These routines are all big enough that is better to let the compiler
decide to inline or not.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 0cb24f00c920..7ba239e8f0dc 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -899,7 +899,7 @@ static int _lock_fdc(int drive, bool interruptible, int line)
 	_lock_fdc(drive, interruptible, __LINE__)
 
 /* unlocks the driver */
-static inline void unlock_fdc(void)
+static void unlock_fdc(void)
 {
 	unsigned long flags;
 
@@ -1224,7 +1224,7 @@ static int need_more_output(void)
 /* Set perpendicular mode as required, based on data rate, if supported.
  * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
  */
-static inline void perpendicular_mode(void)
+static void perpendicular_mode(void)
 {
 	unsigned char perp_mode;
 
@@ -3033,7 +3033,7 @@ static inline int fd_copyin(void __user *param, void *address,
 	return copy_from_user(address, param, size) ? -EFAULT : 0;
 }
 
-static inline const char *drive_name(int type, int drive)
+static const char *drive_name(int type, int drive)
 {
 	struct floppy_struct *floppy;
 
@@ -3103,7 +3103,7 @@ static struct cont_t raw_cmd_cont = {
 	.done		= raw_cmd_done
 };
 
-static inline int raw_cmd_copyout(int cmd, void __user *param,
+static int raw_cmd_copyout(int cmd, void __user *param,
 				  struct floppy_raw_cmd *ptr)
 {
 	int ret;
@@ -3148,7 +3148,7 @@ static void raw_cmd_free(struct floppy_raw_cmd **ptr)
 	}
 }
 
-static inline int raw_cmd_copyin(int cmd, void __user *param,
+static int raw_cmd_copyin(int cmd, void __user *param,
 				 struct floppy_raw_cmd **rcmd)
 {
 	struct floppy_raw_cmd *ptr;
@@ -3266,7 +3266,7 @@ static int invalidate_drive(struct block_device *bdev)
 	return 0;
 }
 
-static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
+static int set_geometry(unsigned int cmd, struct floppy_struct *g,
 			       int drive, int type, struct block_device *bdev)
 {
 	int cnt;
@@ -3365,7 +3365,7 @@ static int ioctl_table[] = {
 	FDTWADDLE
 };
 
-static inline int normalize_ioctl(int *cmd, int *size)
+static int normalize_ioctl(int *cmd, int *size)
 {
 	int i;
 
-- 
cgit v1.2.3


From 41a55b4de396f675485a3f3cb3e1b117316e9ce9 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: silence warning during disk test

The first thing the floppy does is read block 0 to test geometry and to
test for disk presence.  If disk is not present this causes a console
warning message about failed I/O.  Set flag to silence.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 7ba239e8f0dc..5816387f9bce 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3829,6 +3829,7 @@ static int __floppy_read_block_0(struct block_device *bdev)
 	bio.bi_size = size;
 	bio.bi_bdev = bdev;
 	bio.bi_sector = 0;
+	bio.bi_flags = BIO_QUIET;
 	init_completion(&complete);
 	bio.bi_private = &complete;
 	bio.bi_end_io = floppy_rb0_complete;
-- 
cgit v1.2.3


From 575cfc673e0f2e6f71ccc01bb77d7ec811054048 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: use atomic type for usage_count

The usage_count was being protected by a lock which was only there to
create an atomic counter.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 42 ++++++++++++------------------------------
 1 file changed, 12 insertions(+), 30 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 5816387f9bce..9b4746871227 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -578,7 +578,7 @@ static void reset_fdc(void);
 #define NEED_1_RECAL	-2
 #define NEED_2_RECAL	-3
 
-static int usage_count;
+static atomic_t usage_count = ATOMIC_INIT(0);
 
 /* buffer related variables */
 static int buffer_track = -1;
@@ -860,7 +860,7 @@ static void set_fdc(int drive)
 /* locks the driver */
 static int _lock_fdc(int drive, bool interruptible, int line)
 {
-	if (!usage_count) {
+	if (atomic_read(&usage_count) == 0) {
 		pr_err("Trying to lock fdc while usage count=0 at line %d\n",
 		       line);
 		return -1;
@@ -2941,7 +2941,7 @@ static void do_fd_request(struct request_queue *q)
 		return;
 	}
 
-	if (usage_count == 0) {
+	if (atomic_read(&usage_count) == 0) {
 		pr_info("warning: usage count=0, current_req=%p exiting\n",
 			current_req);
 		pr_info("sect=%ld type=%x flags=%x\n",
@@ -3858,7 +3858,7 @@ static int floppy_revalidate(struct gendisk *disk)
 	if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
 	    test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
 	    test_bit(drive, &fake_change) || NO_GEOM) {
-		if (usage_count == 0) {
+		if (atomic_read(&usage_count) == 0) {
 			pr_info("VFS: revalidate called on non-open device.\n");
 			return -EFAULT;
 		}
@@ -4357,7 +4357,7 @@ out_unreg_platform_dev:
 	platform_device_unregister(&floppy_device[drive]);
 out_flush_work:
 	flush_scheduled_work();
-	if (usage_count)
+	if (atomic_read(&usage_count))
 		floppy_release_irq_and_dma();
 out_unreg_region:
 	blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
@@ -4374,8 +4374,6 @@ out_put_disk:
 	return err;
 }
 
-static DEFINE_SPINLOCK(floppy_usage_lock);
-
 static const struct io_region {
 	int offset;
 	int size;
@@ -4421,14 +4419,8 @@ static void floppy_release_regions(int fdc)
 
 static int floppy_grab_irq_and_dma(void)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&floppy_usage_lock, flags);
-	if (usage_count++) {
-		spin_unlock_irqrestore(&floppy_usage_lock, flags);
+	if (atomic_inc_return(&usage_count) > 1)
 		return 0;
-	}
-	spin_unlock_irqrestore(&floppy_usage_lock, flags);
 
 	/*
 	 * We might have scheduled a free_irq(), wait it to
@@ -4439,9 +4431,7 @@ static int floppy_grab_irq_and_dma(void)
 	if (fd_request_irq()) {
 		DPRINT("Unable to grab IRQ%d for the floppy driver\n",
 		       FLOPPY_IRQ);
-		spin_lock_irqsave(&floppy_usage_lock, flags);
-		usage_count--;
-		spin_unlock_irqrestore(&floppy_usage_lock, flags);
+		atomic_dec(&usage_count);
 		return -1;
 	}
 	if (fd_request_dma()) {
@@ -4451,9 +4441,7 @@ static int floppy_grab_irq_and_dma(void)
 			use_virtual_dma = can_use_virtual_dma = 1;
 		if (!(can_use_virtual_dma & 1)) {
 			fd_free_irq();
-			spin_lock_irqsave(&floppy_usage_lock, flags);
-			usage_count--;
-			spin_unlock_irqrestore(&floppy_usage_lock, flags);
+			atomic_dec(&usage_count);
 			return -1;
 		}
 	}
@@ -4488,9 +4476,7 @@ cleanup:
 	fd_free_dma();
 	while (--fdc >= 0)
 		floppy_release_regions(fdc);
-	spin_lock_irqsave(&floppy_usage_lock, flags);
-	usage_count--;
-	spin_unlock_irqrestore(&floppy_usage_lock, flags);
+	atomic_dec(&usage_count);
 	return -1;
 }
 
@@ -4502,14 +4488,10 @@ static void floppy_release_irq_and_dma(void)
 #endif
 	long tmpsize;
 	unsigned long tmpaddr;
-	unsigned long flags;
 
-	spin_lock_irqsave(&floppy_usage_lock, flags);
-	if (--usage_count) {
-		spin_unlock_irqrestore(&floppy_usage_lock, flags);
+	if (!atomic_dec_and_test(&usage_count))
 		return;
-	}
-	spin_unlock_irqrestore(&floppy_usage_lock, flags);
+
 	if (irqdma_allocated) {
 		fd_disable_dma();
 		fd_free_dma();
@@ -4602,7 +4584,7 @@ static void __exit floppy_module_exit(void)
 	del_timer_sync(&fd_timer);
 	blk_cleanup_queue(floppy_queue);
 
-	if (usage_count)
+	if (atomic_read(&usage_count))
 		floppy_release_irq_and_dma();
 
 	/* eject disk, if any */
-- 
cgit v1.2.3


From be1c0fbfb4e84d0b02903cbc6358124586605a1b Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: cmos attribute should be static

As reported by sparse, cmos attribute is local.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 9b4746871227..975fac3669c5 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4127,7 +4127,7 @@ static ssize_t floppy_cmos_show(struct device *dev,
 	return sprintf(buf, "%X\n", UDP->cmos);
 }
 
-DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
+static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
 
 static void floppy_device_release(struct device *dev)
 {
-- 
cgit v1.2.3


From 21af5448042a0962fb1df13a310bb363a8f6a8dc Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: fix signed/unsigned warnings

Ioctl cmd value is unsigned, so change normalize_ioctl

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 975fac3669c5..fd7085aa999f 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3337,7 +3337,7 @@ static int set_geometry(unsigned int cmd, struct floppy_struct *g,
 }
 
 /* handle obsolete ioctl's */
-static int ioctl_table[] = {
+static unsigned int ioctl_table[] = {
 	FDCLRPRM,
 	FDSETPRM,
 	FDDEFPRM,
@@ -3365,7 +3365,7 @@ static int ioctl_table[] = {
 	FDTWADDLE
 };
 
-static int normalize_ioctl(int *cmd, int *size)
+static int normalize_ioctl(unsigned int *cmd, int *size)
 {
 	int i;
 
-- 
cgit v1.2.3


From b862f26fe17df273167bd47df79e8742a1bf101c Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: use wait_event_interruptible

Convert wait loops to use wait_event_ macros.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 59 ++++++++------------------------------------------
 1 file changed, 9 insertions(+), 50 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index fd7085aa999f..3fdceda85735 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -514,8 +514,6 @@ static unsigned long fdc_busy;
 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
 static DECLARE_WAIT_QUEUE_HEAD(command_done);
 
-#define NO_SIGNAL (!interruptible || !signal_pending(current))
-
 /* Errors during formatting are counted here. */
 static int format_errors;
 
@@ -858,36 +856,15 @@ static void set_fdc(int drive)
 }
 
 /* locks the driver */
-static int _lock_fdc(int drive, bool interruptible, int line)
+static int lock_fdc(int drive, bool interruptible)
 {
-	if (atomic_read(&usage_count) == 0) {
-		pr_err("Trying to lock fdc while usage count=0 at line %d\n",
-		       line);
+	if (WARN(atomic_read(&usage_count) == 0,
+		 "Trying to lock fdc while usage count=0\n"))
 		return -1;
-	}
 
-	if (test_and_set_bit(0, &fdc_busy)) {
-		DECLARE_WAITQUEUE(wait, current);
-		add_wait_queue(&fdc_wait, &wait);
-
-		for (;;) {
-			set_current_state(TASK_INTERRUPTIBLE);
-
-			if (!test_and_set_bit(0, &fdc_busy))
-				break;
-
-			schedule();
-
-			if (!NO_SIGNAL) {
-				remove_wait_queue(&fdc_wait, &wait);
-				return -EINTR;
-			}
-		}
+	if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy)))
+		return -EINTR;
 
-		set_current_state(TASK_RUNNING);
-		remove_wait_queue(&fdc_wait, &wait);
-		flush_scheduled_work();
-	}
 	command_status = FD_COMMAND_NONE;
 
 	__reschedule_timeout(drive, "lock fdc");
@@ -895,9 +872,6 @@ static int _lock_fdc(int drive, bool interruptible, int line)
 	return 0;
 }
 
-#define lock_fdc(drive, interruptible)			\
-	_lock_fdc(drive, interruptible, __LINE__)
-
 /* unlocks the driver */
 static void unlock_fdc(void)
 {
@@ -2015,25 +1989,10 @@ static int wait_til_done(void (*handler)(void), bool interruptible)
 
 	schedule_bh(handler);
 
-	if (command_status < 2 && NO_SIGNAL) {
-		DECLARE_WAITQUEUE(wait, current);
-
-		add_wait_queue(&command_done, &wait);
-		for (;;) {
-			set_current_state(interruptible ?
-					  TASK_INTERRUPTIBLE :
-					  TASK_UNINTERRUPTIBLE);
-
-			if (command_status >= 2 || !NO_SIGNAL)
-				break;
-
-			is_alive(__func__, "");
-			schedule();
-		}
-
-		set_current_state(TASK_RUNNING);
-		remove_wait_queue(&command_done, &wait);
-	}
+	if (interruptible)
+		wait_event_interruptible(command_done, command_status >= 2);
+	else
+		wait_event(command_done, command_status >= 2);
 
 	if (command_status < 2) {
 		cancel_activity();
-- 
cgit v1.2.3


From 01b6b67edabe864391163dc6405e2cb454f108db Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 15 Jun 2010 13:21:11 +0200
Subject: floppy: use warning macros

Convert assertions to use WARN().  There are several error checks in the
code for things that should never happen.  Convert them to standard
warnings so kerneloops.org will see them.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 3fdceda85735..82c30f9f81ca 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -2542,10 +2542,8 @@ static int make_raw_rw_request(void)
 	int tracksize;
 	int ssize;
 
-	if (max_buffer_sectors == 0) {
-		pr_info("VFS: Block I/O scheduled on unopened device\n");
+	if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n"))
 		return 0;
-	}
 
 	set_fdc((long)current_req->rq_disk->private_data);
 
@@ -2895,19 +2893,16 @@ static void process_fd_request(void)
 
 static void do_fd_request(struct request_queue *q)
 {
-	if (max_buffer_sectors == 0) {
-		pr_info("VFS: %s called on non-open device\n", __func__);
+	if (WARN(max_buffer_sectors == 0,
+		 "VFS: %s called on non-open device\n", __func__))
 		return;
-	}
 
-	if (atomic_read(&usage_count) == 0) {
-		pr_info("warning: usage count=0, current_req=%p exiting\n",
-			current_req);
-		pr_info("sect=%ld type=%x flags=%x\n",
-			(long)blk_rq_pos(current_req), current_req->cmd_type,
-			current_req->cmd_flags);
+	if (WARN(atomic_read(&usage_count) == 0,
+		 "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n",
+		 current_req, (long)blk_rq_pos(current_req), current_req->cmd_type,
+		 current_req->cmd_flags))
 		return;
-	}
+
 	if (test_bit(0, &fdc_busy)) {
 		/* fdc busy, this new request will be treated when the
 		   current one is done */
@@ -3817,10 +3812,10 @@ static int floppy_revalidate(struct gendisk *disk)
 	if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
 	    test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
 	    test_bit(drive, &fake_change) || NO_GEOM) {
-		if (atomic_read(&usage_count) == 0) {
-			pr_info("VFS: revalidate called on non-open device.\n");
+		if (WARN(atomic_read(&usage_count) == 0,
+			 "VFS: revalidate called on non-open device.\n"))
 			return -EFAULT;
-		}
+
 		lock_fdc(drive, false);
 		cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
 		      test_bit(FD_VERIFY_BIT, &UDRS->flags));
-- 
cgit v1.2.3


From b375a612ad931264b71cf162d692b4420f2578a9 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Thu, 17 Jun 2010 14:58:21 +0200
Subject: aha1532: remove ISA_DMA_THRESHOLD usage

We can safely remove ISA_DMA_THRESHOLD usage in aha1542. aha1542 uses
ISA_DMA_THRESHOLD to see if:

- the buffers in scatter/list are below 16MB.
- scsi_host is below 16MB.

Both checkings were added in the ancient times but aren't necessary
nowadays since we properly bounce the buffers and allocate scsi_host
below 16MB with non-zero unchecked_isa_dma.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/aha1542.c | 25 -------------------------
 1 file changed, 25 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c
index 2a8cf137f609..4f785f254c1f 100644
--- a/drivers/scsi/aha1542.c
+++ b/drivers/scsi/aha1542.c
@@ -52,22 +52,6 @@
 #define SCSI_BUF_PA(address)	isa_virt_to_bus(address)
 #define SCSI_SG_PA(sgent)	(isa_page_to_bus(sg_page((sgent))) + (sgent)->offset)
 
-static void BAD_SG_DMA(Scsi_Cmnd * SCpnt,
-		       struct scatterlist *sgp,
-		       int nseg,
-		       int badseg)
-{
-	printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n",
-	       badseg, nseg, sg_virt(sgp),
-	       (unsigned long long)SCSI_SG_PA(sgp),
-	       sgp->length);
-
-	/*
-	 * Not safe to continue.
-	 */
-	panic("Buffer at physical address > 16Mb used for aha1542");
-}
-
 #include<linux/stat.h>
 
 #ifdef DEBUG
@@ -691,8 +675,6 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
 		}
 		scsi_for_each_sg(SCpnt, sg, sg_count, i) {
 			any2scsi(cptr[i].dataptr, SCSI_SG_PA(sg));
-			if (SCSI_SG_PA(sg) + sg->length - 1 > ISA_DMA_THRESHOLD)
-				BAD_SG_DMA(SCpnt, scsi_sglist(SCpnt), sg_count, i);
 			any2scsi(cptr[i].datalen, sg->length);
 		};
 		any2scsi(ccb[mbo].datalen, sg_count * sizeof(struct chain));
@@ -1133,16 +1115,9 @@ static int __init aha1542_detect(struct scsi_host_template * tpnt)
 				release_region(bases[indx], 4);
 				continue;
 			}
-			/* For now we do this - until kmalloc is more intelligent
-			   we are resigned to stupid hacks like this */
-			if (SCSI_BUF_PA(shpnt) >= ISA_DMA_THRESHOLD) {
-				printk(KERN_ERR "Invalid address for shpnt with 1542.\n");
-				goto unregister;
-			}
 			if (!aha1542_test_port(bases[indx], shpnt))
 				goto unregister;
 
-
 			base_io = bases[indx];
 
 			/* Set the Bus on/off-times as not to ruin floppy performance */
-- 
cgit v1.2.3


From 33659ebbae262228eef4e0fe990f393d1f0ed941 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Sat, 7 Aug 2010 18:17:56 +0200
Subject: block: remove wrappers for request type/flags

Remove all the trivial wrappers for the cmd_type and cmd_flags fields in
struct requests.  This allows much easier grepping for different request
types instead of unwinding through macros.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/ata/libata-scsi.c           |  2 +-
 drivers/block/cciss.c               | 49 ++++++++++++++++-----------
 drivers/block/hd.c                  |  2 +-
 drivers/block/mg_disk.c             |  4 +--
 drivers/block/nbd.c                 |  2 +-
 drivers/block/osdblk.c              |  3 +-
 drivers/block/paride/pd.c           |  2 +-
 drivers/block/ps3disk.c             |  2 +-
 drivers/block/ub.c                  |  8 ++---
 drivers/block/viodasd.c             |  2 +-
 drivers/block/virtio_blk.c          | 15 +++++----
 drivers/block/xd.c                  |  2 +-
 drivers/block/xen-blkfront.c        |  4 +--
 drivers/block/xsysace.c             |  2 +-
 drivers/cdrom/gdrom.c               |  2 +-
 drivers/cdrom/viocd.c               |  2 +-
 drivers/ide/ide-atapi.c             | 17 ++++++----
 drivers/ide/ide-cd.c                | 66 ++++++++++++++++++++-----------------
 drivers/ide/ide-disk.c              |  2 +-
 drivers/ide/ide-eh.c                |  5 +--
 drivers/ide/ide-floppy.c            | 25 +++++++++-----
 drivers/ide/ide-io.c                |  8 ++---
 drivers/ide/ide-pm.c                |  8 ++---
 drivers/ide/ide-tape.c              |  3 +-
 drivers/md/dm.c                     | 10 +++---
 drivers/memstick/core/mspro_block.c |  3 +-
 drivers/message/i2o/i2o_block.c     |  2 +-
 drivers/mmc/card/queue.c            |  2 +-
 drivers/mtd/mtd_blkdevs.c           |  4 +--
 drivers/scsi/scsi_error.c           | 10 +++---
 drivers/scsi/scsi_lib.c             |  5 +--
 drivers/scsi/sd.c                   | 12 +++----
 drivers/scsi/sun3_NCR5380.c         |  2 +-
 drivers/scsi/sun3_scsi.c            |  2 +-
 drivers/scsi/sun3_scsi_vme.c        |  2 +-
 drivers/staging/hv/blkvsc_drv.c     |  8 +++--
 36 files changed, 168 insertions(+), 131 deletions(-)

(limited to 'drivers')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a54273d2c3c6..a5c08b082edb 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1111,7 +1111,7 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev)
  */
 static int atapi_drain_needed(struct request *rq)
 {
-	if (likely(!blk_pc_request(rq)))
+	if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
 		return 0;
 
 	if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_RW))
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 10a0268a1f92..11b377762b8e 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1783,7 +1783,7 @@ static void cciss_softirq_done(struct request *rq)
 #endif				/* CCISS_DEBUG */
 
 	/* set the residual count for pc requests */
-	if (blk_pc_request(rq))
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		rq->resid_len = cmd->err_info->ResidualCnt;
 
 	blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
@@ -2983,7 +2983,7 @@ static inline int evaluate_target_status(ctlr_info_t *h,
 	driver_byte = DRIVER_OK;
 	msg_byte = cmd->err_info->CommandStatus; /* correct?  seems too device specific */
 
-	if (blk_pc_request(cmd->rq))
+	if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		host_byte = DID_PASSTHROUGH;
 	else
 		host_byte = DID_OK;
@@ -2992,7 +2992,7 @@ static inline int evaluate_target_status(ctlr_info_t *h,
 		host_byte, driver_byte);
 
 	if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
-		if (!blk_pc_request(cmd->rq))
+		if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
 			printk(KERN_WARNING "cciss: cmd %p "
 			       "has SCSI Status 0x%x\n",
 			       cmd, cmd->err_info->ScsiStatus);
@@ -3002,15 +3002,17 @@ static inline int evaluate_target_status(ctlr_info_t *h,
 	/* check the sense key */
 	sense_key = 0xf & cmd->err_info->SenseInfo[2];
 	/* no status or recovered error */
-	if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
+	if (((sense_key == 0x0) || (sense_key == 0x1)) &&
+	    (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
 		error_value = 0;
 
 	if (check_for_unit_attention(h, cmd)) {
-		*retry_cmd = !blk_pc_request(cmd->rq);
+		*retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
 		return 0;
 	}
 
-	if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
+	/* Not SG_IO or similar? */
+	if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 		if (error_value != 0)
 			printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
 			       " sense key = 0x%x\n", cmd, sense_key);
@@ -3052,7 +3054,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 		rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
 		break;
 	case CMD_DATA_UNDERRUN:
-		if (blk_fs_request(cmd->rq)) {
+		if (cmd->rq->cmd_type == REQ_TYPE_FS) {
 			printk(KERN_WARNING "cciss: cmd %p has"
 			       " completed with data underrun "
 			       "reported\n", cmd);
@@ -3060,7 +3062,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 		}
 		break;
 	case CMD_DATA_OVERRUN:
-		if (blk_fs_request(cmd->rq))
+		if (cmd->rq->cmd_type == REQ_TYPE_FS)
 			printk(KERN_WARNING "cciss: cmd %p has"
 			       " completed with data overrun "
 			       "reported\n", cmd);
@@ -3070,42 +3072,48 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 		       "reported invalid\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_PROTOCOL_ERR:
 		printk(KERN_WARNING "cciss: cmd %p has "
 		       "protocol error \n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_HARDWARE_ERR:
 		printk(KERN_WARNING "cciss: cmd %p had "
 		       " hardware error\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_CONNECTION_LOST:
 		printk(KERN_WARNING "cciss: cmd %p had "
 		       "connection lost\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_ABORTED:
 		printk(KERN_WARNING "cciss: cmd %p was "
 		       "aborted\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ABORT);
 		break;
 	case CMD_ABORT_FAILED:
 		printk(KERN_WARNING "cciss: cmd %p reports "
 		       "abort failed\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_UNSOLICITED_ABORT:
 		printk(KERN_WARNING "cciss%d: unsolicited "
@@ -3121,13 +3129,15 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 			       "many times\n", h->ctlr, cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ABORT);
 		break;
 	case CMD_TIMEOUT:
 		printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	default:
 		printk(KERN_WARNING "cciss: cmd %p returned "
@@ -3135,7 +3145,8 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 		       cmd->err_info->CommandStatus);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
-			blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
+			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
+				DID_PASSTHROUGH : DID_ERROR);
 	}
 
 after_error_processing:
@@ -3294,7 +3305,7 @@ static void do_cciss_request(struct request_queue *q)
 		c->Header.SGList = h->max_cmd_sgentries;
 	set_performant_mode(h, c);
 
-	if (likely(blk_fs_request(creq))) {
+	if (likely(creq->cmd_type == REQ_TYPE_FS)) {
 		if(h->cciss_read == CCISS_READ_10) {
 			c->Request.CDB[1] = 0;
 			c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
@@ -3324,7 +3335,7 @@ static void do_cciss_request(struct request_queue *q)
 			c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
 			c->Request.CDB[14] = c->Request.CDB[15] = 0;
 		}
-	} else if (blk_pc_request(creq)) {
+	} else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		c->Request.CDBLen = creq->cmd_len;
 		memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
 	} else {
diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 81c78b3ce2df..30ec6b37424e 100644
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -627,7 +627,7 @@ repeat:
 		req_data_dir(req) == READ ? "read" : "writ",
 		cyl, head, sec, nsect, req->buffer);
 #endif
-	if (blk_fs_request(req)) {
+	if (req->cmd_type == REQ_TYPE_FS) {
 		switch (rq_data_dir(req)) {
 		case READ:
 			hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_READ,
diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index 28db925dbdad..b82c5ce5e9df 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -670,7 +670,7 @@ static void mg_request_poll(struct request_queue *q)
 				break;
 		}
 
-		if (unlikely(!blk_fs_request(host->req))) {
+		if (unlikely(host->req->cmd_type != REQ_TYPE_FS)) {
 			mg_end_request_cur(host, -EIO);
 			continue;
 		}
@@ -756,7 +756,7 @@ static void mg_request(struct request_queue *q)
 			continue;
 		}
 
-		if (unlikely(!blk_fs_request(req))) {
+		if (unlikely(req->cmd_type != REQ_TYPE_FS)) {
 			mg_end_request_cur(host, -EIO);
 			continue;
 		}
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 218d091f3c52..2e74e7d475ca 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -448,7 +448,7 @@ static void nbd_clear_que(struct nbd_device *lo)
 
 static void nbd_handle_req(struct nbd_device *lo, struct request *req)
 {
-	if (!blk_fs_request(req))
+	if (req->cmd_type != REQ_TYPE_FS)
 		goto error_out;
 
 	nbd_cmd(req) = NBD_CMD_READ;
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index 6cd8b705b11b..819002ba3433 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -310,7 +310,8 @@ static void osdblk_rq_fn(struct request_queue *q)
 			break;
 
 		/* filter out block requests we don't understand */
-		if (!blk_fs_request(rq) && !blk_barrier_rq(rq)) {
+		if (rq->cmd_type != REQ_TYPE_FS &&
+		    !(rq->cmd_flags & REQ_HARDBARRIER)) {
 			blk_end_request_all(rq, 0);
 			continue;
 		}
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index c1e5cd029b23..4e8b9bff3abe 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -439,7 +439,7 @@ static char *pd_buf;		/* buffer for request in progress */
 
 static enum action do_pd_io_start(void)
 {
-	if (blk_special_request(pd_req)) {
+	if (pd_req->cmd_type == REQ_TYPE_SPECIAL) {
 		phase = pd_special;
 		return pd_special();
 	}
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index 3b419e3fffa1..5f208c0bf156 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -196,7 +196,7 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
 	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
 
 	while ((req = blk_fetch_request(q))) {
-		if (blk_fs_request(req)) {
+		if (req->cmd_type == REQ_TYPE_FS) {
 			if (ps3disk_submit_request_sg(dev, req))
 				break;
 		} else if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 0536b5b29adc..034b34440ffa 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -648,7 +648,7 @@ static int ub_request_fn_1(struct ub_lun *lun, struct request *rq)
 		return 0;
 	}
 
-	if (lun->changed && !blk_pc_request(rq)) {
+	if (lun->changed && rq->cmd_type != REQ_TYPE_BLOCK_PC)
 		blk_start_request(rq);
 		ub_end_rq(rq, SAM_STAT_CHECK_CONDITION);
 		return 0;
@@ -684,7 +684,7 @@ static int ub_request_fn_1(struct ub_lun *lun, struct request *rq)
 	}
 	urq->nsg = n_elem;
 
-	if (blk_pc_request(rq)) {
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		ub_cmd_build_packet(sc, lun, cmd, urq);
 	} else {
 		ub_cmd_build_block(sc, lun, cmd, urq);
@@ -781,7 +781,7 @@ static void ub_rw_cmd_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
 	rq = urq->rq;
 
 	if (cmd->error == 0) {
-		if (blk_pc_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 			if (cmd->act_len >= rq->resid_len)
 				rq->resid_len = 0;
 			else
@@ -795,7 +795,7 @@ static void ub_rw_cmd_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd)
 			}
 		}
 	} else {
-		if (blk_pc_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 			/* UB_SENSE_SIZE is smaller than SCSI_SENSE_BUFFERSIZE */
 			memcpy(rq->sense, sc->top_sense, UB_SENSE_SIZE);
 			rq->sense_len = UB_SENSE_SIZE;
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index 788d93882ab9..5663d3c284c8 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -361,7 +361,7 @@ static void do_viodasd_request(struct request_queue *q)
 		if (req == NULL)
 			return;
 		/* check that request contains a valid command */
-		if (!blk_fs_request(req)) {
+		if (req->cmd_type != REQ_TYPE_FS) {
 			viodasd_end_request(req, -EIO, blk_rq_sectors(req));
 			continue;
 		}
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 258bc2ae2885..774144334ece 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -65,13 +65,16 @@ static void blk_done(struct virtqueue *vq)
 			break;
 		}
 
-		if (blk_pc_request(vbr->req)) {
+		switch (vbr->req->cmd_type) {
+		case REQ_TYPE_BLOCK_PC:
 			vbr->req->resid_len = vbr->in_hdr.residual;
 			vbr->req->sense_len = vbr->in_hdr.sense_len;
 			vbr->req->errors = vbr->in_hdr.errors;
-		}
-		if (blk_special_request(vbr->req))
+			break;
+		case REQ_TYPE_SPECIAL:
 			vbr->req->errors = (error != 0);
+			break;
+		}
 
 		__blk_end_request_all(vbr->req, error);
 		list_del(&vbr->list);
@@ -123,7 +126,7 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 		BUG();
 	}
 
-	if (blk_barrier_rq(vbr->req))
+	if (vbr->req->cmd_flags & REQ_HARDBARRIER)
 		vbr->out_hdr.type |= VIRTIO_BLK_T_BARRIER;
 
 	sg_set_buf(&vblk->sg[out++], &vbr->out_hdr, sizeof(vbr->out_hdr));
@@ -134,12 +137,12 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 	 * block, and before the normal inhdr we put the sense data and the
 	 * inhdr with additional status information before the normal inhdr.
 	 */
-	if (blk_pc_request(vbr->req))
+	if (vbr->req->cmd_type == REQ_TYPE_BLOCK_PC)
 		sg_set_buf(&vblk->sg[out++], vbr->req->cmd, vbr->req->cmd_len);
 
 	num = blk_rq_map_sg(q, vbr->req, vblk->sg + out);
 
-	if (blk_pc_request(vbr->req)) {
+	if (vbr->req->cmd_type == REQ_TYPE_BLOCK_PC) {
 		sg_set_buf(&vblk->sg[num + out + in++], vbr->req->sense, 96);
 		sg_set_buf(&vblk->sg[num + out + in++], &vbr->in_hdr,
 			   sizeof(vbr->in_hdr));
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 18a80ff57ce8..4dc298376098 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -322,7 +322,7 @@ static void do_xd_request (struct request_queue * q)
 		int res = -EIO;
 		int retry;
 
-		if (!blk_fs_request(req))
+		if (req->cmd_type != REQ_TYPE_FS) {
 			goto done;
 		if (block + count > get_capacity(req->rq_disk))
 			goto done;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 82ed403147c0..495533e66542 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -238,7 +238,7 @@ static int blkif_queue_request(struct request *req)
 
 	ring_req->operation = rq_data_dir(req) ?
 		BLKIF_OP_WRITE : BLKIF_OP_READ;
-	if (blk_barrier_rq(req))
+	if (req->cmd_flags & REQ_HARDBARRIER)
 		ring_req->operation = BLKIF_OP_WRITE_BARRIER;
 
 	ring_req->nr_segments = blk_rq_map_sg(req->q, req, info->sg);
@@ -309,7 +309,7 @@ static void do_blkif_request(struct request_queue *rq)
 
 		blk_start_request(req);
 
-		if (!blk_fs_request(req)) {
+		if (req->cmd_type != REQ_TYPE_FS) {
 			__blk_end_request_all(req, -EIO);
 			continue;
 		}
diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index a7b83c0a7eb5..ac278ac908d5 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -465,7 +465,7 @@ struct request *ace_get_next_request(struct request_queue * q)
 	struct request *req;
 
 	while ((req = blk_peek_request(q)) != NULL) {
-		if (blk_fs_request(req))
+		if (req->cmd_type == REQ_TYPE_FS)
 			break;
 		blk_start_request(req);
 		__blk_end_request_all(req, -EIO);
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 03c71f7698cb..7c05ddc63ae8 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -643,7 +643,7 @@ static void gdrom_request(struct request_queue *rq)
 	struct request *req;
 
 	while ((req = blk_fetch_request(rq)) != NULL) {
-		if (!blk_fs_request(req)) {
+		if (req->cmd_type != REQ_TYPE_FS) {
 			printk(KERN_DEBUG "GDROM: Non-fs request ignored\n");
 			__blk_end_request_all(req, -EIO);
 			continue;
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 451cd7071b1d..14e420168764 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -298,7 +298,7 @@ static void do_viocd_request(struct request_queue *q)
 	struct request *req;
 
 	while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) {
-		if (!blk_fs_request(req))
+		if (req->cmd_type != REQ_TYPE_FS)
 			__blk_end_request_all(req, -EIO);
 		else if (send_request(req) < 0) {
 			printk(VIOCD_KERN_WARNING
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index f9daffd7d0e3..3117a894d20e 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -190,7 +190,7 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
 
 	BUG_ON(sense_len > sizeof(*sense));
 
-	if (blk_sense_request(rq) || drive->sense_rq_armed)
+	if (rq->cmd_type == REQ_TYPE_SENSE || drive->sense_rq_armed)
 		return;
 
 	memset(sense, 0, sizeof(*sense));
@@ -307,13 +307,16 @@ EXPORT_SYMBOL_GPL(ide_cd_expiry);
 
 int ide_cd_get_xferlen(struct request *rq)
 {
-	if (blk_fs_request(rq))
+	switch (rq->cmd_type)
+	case REQ_TYPE_FS:
 		return 32768;
-	else if (blk_sense_request(rq) || blk_pc_request(rq) ||
-			 rq->cmd_type == REQ_TYPE_ATA_PC)
+	case REQ_TYPE_SENSE:
+	case REQ_TYPE_BLOCK_PC:
+	case REQ_TYPE_ATA_PC:
 		return blk_rq_bytes(rq);
-	else
+	default:
 		return 0;
+	}
 }
 EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
 
@@ -474,12 +477,12 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 		if (uptodate == 0)
 			drive->failed_pc = NULL;
 
-		if (blk_special_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_SPECIAL)
 			rq->errors = 0;
 			error = 0;
 		} else {
 
-			if (blk_fs_request(rq) == 0 && uptodate <= 0) {
+			if (req->cmd_type != REQ_TYPE_FS && uptodate <= 0) {
 				if (rq->errors == 0)
 					rq->errors = -EIO;
 			}
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 64207df8da82..26a3688de467 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -176,7 +176,7 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 			if (!sense->valid)
 				break;
 			if (failed_command == NULL ||
-					!blk_fs_request(failed_command))
+			    failed_command->cmd_type != REQ_TYPE_FS)
 				break;
 			sector = (sense->information[0] << 24) |
 				 (sense->information[1] << 16) |
@@ -292,7 +292,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 				  "stat 0x%x",
 				  rq->cmd[0], rq->cmd_type, err, stat);
 
-	if (blk_sense_request(rq)) {
+	if (rq->cmd_type == REQ_TYPE_SENSE) {
 		/*
 		 * We got an error trying to get sense info from the drive
 		 * (probably while trying to recover from a former error).
@@ -303,7 +303,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 	}
 
 	/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
-	if (blk_pc_request(rq) && !rq->errors)
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
 		rq->errors = SAM_STAT_CHECK_CONDITION;
 
 	if (blk_noretry_request(rq))
@@ -311,13 +311,14 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 
 	switch (sense_key) {
 	case NOT_READY:
-		if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
+		if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
 			if (ide_cd_breathe(drive, rq))
 				return 1;
 		} else {
 			cdrom_saw_media_change(drive);
 
-			if (blk_fs_request(rq) && !blk_rq_quiet(rq))
+			if (rq->cmd_type == REQ_TYPE_FS &&
+			    !(rq->cmd_flags & REQ_QUIET)) {
 				printk(KERN_ERR PFX "%s: tray open\n",
 					drive->name);
 		}
@@ -326,7 +327,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 	case UNIT_ATTENTION:
 		cdrom_saw_media_change(drive);
 
-		if (blk_fs_request(rq) == 0)
+		if (rq->cmd_type != REQ_TYPE_FS)
 			return 0;
 
 		/*
@@ -352,7 +353,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		 * No point in retrying after an illegal request or data
 		 * protect error.
 		 */
-		if (!blk_rq_quiet(rq))
+		if (!(rq->cmd_flags & REQ_QUIET))
 			ide_dump_status(drive, "command error", stat);
 		do_end_request = 1;
 		break;
@@ -361,20 +362,20 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		 * No point in re-trying a zillion times on a bad sector.
 		 * If we got here the error is not correctable.
 		 */
-		if (!blk_rq_quiet(rq))
+		if (!(rq->cmd_flags & REQ_QUIET))
 			ide_dump_status(drive, "media error "
 					"(bad sector)", stat);
 		do_end_request = 1;
 		break;
 	case BLANK_CHECK:
 		/* disk appears blank? */
-		if (!blk_rq_quiet(rq))
+		if (!(rq->cmd_flags & REQ_QUIET))
 			ide_dump_status(drive, "media error (blank)",
 					stat);
 		do_end_request = 1;
 		break;
 	default:
-		if (blk_fs_request(rq) == 0)
+		if (req->cmd_type != REQ_TYPE_FS)
 			break;
 		if (err & ~ATA_ABORTED) {
 			/* go to the default handler for other errors */
@@ -385,7 +386,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 			do_end_request = 1;
 	}
 
-	if (blk_fs_request(rq) == 0) {
+	if (rq->cmd_type != REQ_TYPE_FS) {
 		rq->cmd_flags |= REQ_FAILED;
 		do_end_request = 1;
 	}
@@ -525,7 +526,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	ide_expiry_t *expiry = NULL;
 	int dma_error = 0, dma, thislen, uptodate = 0;
 	int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
-	int sense = blk_sense_request(rq);
+	int sense = (rq->cmd_type == REQ_TYPE_SENSE);
 	unsigned int timeout;
 	u16 len;
 	u8 ireason, stat;
@@ -568,7 +569,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 
 	ide_read_bcount_and_ireason(drive, &len, &ireason);
 
-	thislen = blk_fs_request(rq) ? len : cmd->nleft;
+	thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
 	if (thislen > len)
 		thislen = len;
 
@@ -577,7 +578,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 
 	/* If DRQ is clear, the command has completed. */
 	if ((stat & ATA_DRQ) == 0) {
-		if (blk_fs_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_FS) {
 			/*
 			 * If we're not done reading/writing, complain.
 			 * Otherwise, complete the command normally.
@@ -591,7 +592,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 					rq->cmd_flags |= REQ_FAILED;
 				uptodate = 0;
 			}
-		} else if (!blk_pc_request(rq)) {
+		} else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 			ide_cd_request_sense_fixup(drive, cmd);
 
 			uptodate = cmd->nleft ? 0 : 1;
@@ -640,7 +641,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 
 	/* pad, if necessary */
 	if (len > 0) {
-		if (blk_fs_request(rq) == 0 || write == 0)
+		if (rq->cmd_type != REQ_TYPE_FS || write == 0)
 			ide_pad_transfer(drive, write, len);
 		else {
 			printk(KERN_ERR PFX "%s: confused, missing data\n",
@@ -649,11 +650,11 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 		}
 	}
 
-	if (blk_pc_request(rq)) {
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		timeout = rq->timeout;
 	} else {
 		timeout = ATAPI_WAIT_PC;
-		if (!blk_fs_request(rq))
+		if (rq->cmd_type != REQ_TYPE_FS)
 			expiry = ide_cd_expiry;
 	}
 
@@ -662,7 +663,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	return ide_started;
 
 out_end:
-	if (blk_pc_request(rq) && rc == 0) {
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
 		rq->resid_len = 0;
 		blk_end_request_all(rq, 0);
 		hwif->rq = NULL;
@@ -670,7 +671,7 @@ out_end:
 		if (sense && uptodate)
 			ide_cd_complete_failed_rq(drive, rq);
 
-		if (blk_fs_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_FS) {
 			if (cmd->nleft == 0)
 				uptodate = 1;
 		} else {
@@ -682,7 +683,7 @@ out_end:
 			ide_cd_error_cmd(drive, cmd);
 
 		/* make sure it's fully ended */
-		if (blk_fs_request(rq) == 0) {
+		if (rq->cmd_type != REQ_TYPE_FS) {
 			rq->resid_len -= cmd->nbytes - cmd->nleft;
 			if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 				rq->resid_len += cmd->last_xfer_len;
@@ -742,7 +743,7 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 	ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 				  rq->cmd[0], rq->cmd_type);
 
-	if (blk_pc_request(rq))
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		rq->cmd_flags |= REQ_QUIET;
 	else
 		rq->cmd_flags &= ~REQ_FAILED;
@@ -783,21 +784,26 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 	if (drive->debug_mask & IDE_DBG_RQ)
 		blk_dump_rq_flags(rq, "ide_cd_do_request");
 
-	if (blk_fs_request(rq)) {
+	switch (rq->cmd_type) {
+	case REQ_TYPE_FS:
 		if (cdrom_start_rw(drive, rq) == ide_stopped)
 			goto out_end;
-	} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
-		   rq->cmd_type == REQ_TYPE_ATA_PC) {
+		break;
+	case REQ_TYPE_SENSE:
+	case REQ_TYPE_BLOCK_PC:
+	case REQ_TYPE_ATA_PC:
 		if (!rq->timeout)
 			rq->timeout = ATAPI_WAIT_PC;
 
 		cdrom_do_block_pc(drive, rq);
-	} else if (blk_special_request(rq)) {
+		break;
+	case REQ_TYPE_SPECIAL:
 		/* right now this can only be a reset... */
 		uptodate = 1;
 		goto out_end;
-	} else
+	default:
 		BUG();
+	}
 
 	/* prepare sense request for this command */
 	ide_prep_sense(drive, rq);
@@ -809,7 +815,7 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 
 	cmd.rq = rq;
 
-	if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
+	if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
 		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 		ide_map_sg(drive, &cmd);
 	}
@@ -1365,9 +1371,9 @@ static int ide_cdrom_prep_pc(struct request *rq)
 
 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
 {
-	if (blk_fs_request(rq))
+	if (rq->cmd_type == REQ_TYPE_FS)
 		return ide_cdrom_prep_fs(q, rq);
-	else if (blk_pc_request(rq))
+	else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		return ide_cdrom_prep_pc(rq);
 
 	return 0;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 33d65039cce9..df3d91ba1c96 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -184,7 +184,7 @@ static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 	ide_hwif_t *hwif = drive->hwif;
 
 	BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
-	BUG_ON(!blk_fs_request(rq));
+	BUG_ON(rq->cmd_type != REQ_TYPE_FS);
 
 	ledtrig_ide_activity();
 
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
index e9abf2c3c335..c0aa93fb7a60 100644
--- a/drivers/ide/ide-eh.c
+++ b/drivers/ide/ide-eh.c
@@ -122,7 +122,7 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
 		return ide_stopped;
 
 	/* retry only "normal" I/O: */
-	if (!blk_fs_request(rq)) {
+	if (rq->cmd_type != REQ_TYPE_FS) {
 		if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 			struct ide_cmd *cmd = rq->special;
 
@@ -146,7 +146,8 @@ static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
 {
 	struct request *rq = drive->hwif->rq;
 
-	if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) {
+	if (rq && rq->cmd_type == REQ_TYPE_SPECIAL &&
+	    rq->cmd[0] == REQ_DRIVE_RESET) {
 		if (err <= 0 && rq->errors == 0)
 			rq->errors = -EIO;
 		ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq));
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 4713bdca20b6..c7d0737bb18a 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -73,7 +73,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
 		drive->failed_pc = NULL;
 
 	if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
-	    (rq && blk_pc_request(rq)))
+	    (rq && rq->cmd_type == REQ_TYPE_BLOCK_PC))
 		uptodate = 1; /* FIXME */
 	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 
@@ -98,7 +98,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
 			       "Aborting request!\n");
 	}
 
-	if (blk_special_request(rq))
+	if (rq->cmd_type == REQ_TYPE_SPECIAL)
 		rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
 
 	return uptodate;
@@ -247,14 +247,16 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 		} else
 			printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
 
-		if (blk_special_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_SPECIAL) {
 			rq->errors = 0;
 			ide_complete_rq(drive, 0, blk_rq_bytes(rq));
 			return ide_stopped;
 		} else
 			goto out_end;
 	}
-	if (blk_fs_request(rq)) {
+
+	switch (rq->cmd_type) {
+	case REQ_TYPE_FS:
 		if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
 		    (blk_rq_sectors(rq) % floppy->bs_factor)) {
 			printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
@@ -263,13 +265,18 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 		}
 		pc = &floppy->queued_pc;
 		idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
-	} else if (blk_special_request(rq) || blk_sense_request(rq)) {
+		break;
+	case REQ_TYPE_SPECIAL:
+	case REQ_TYPE_SENSE:
 		pc = (struct ide_atapi_pc *)rq->special;
-	} else if (blk_pc_request(rq)) {
+		break;
+	case REQ_TYPE_BLOCK_PC:
 		pc = &floppy->queued_pc;
 		idefloppy_blockpc_cmd(floppy, pc, rq);
-	} else
+		break;
+	default:
 		BUG();
+	}
 
 	ide_prep_sense(drive, rq);
 
@@ -280,7 +287,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 
 	cmd.rq = rq;
 
-	if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
+	if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
 		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 		ide_map_sg(drive, &cmd);
 	}
@@ -290,7 +297,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 	return ide_floppy_issue_pc(drive, &cmd, pc);
 out_end:
 	drive->failed_pc = NULL;
-	if (blk_fs_request(rq) == 0 && rq->errors == 0)
+	if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
 		rq->errors = -EIO;
 	ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
 	return ide_stopped;
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 172ac9218154..9304a7e54d9e 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -135,7 +135,7 @@ EXPORT_SYMBOL(ide_complete_rq);
 
 void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 {
-	u8 drv_req = blk_special_request(rq) && rq->rq_disk;
+	u8 drv_req = (rq->cmd_type == REQ_TYPE_SPECIAL) && rq->rq_disk;
 	u8 media = drive->media;
 
 	drive->failed_pc = NULL;
@@ -145,7 +145,7 @@ void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 	} else {
 		if (media == ide_tape)
 			rq->errors = IDE_DRV_ERROR_GENERAL;
-		else if (blk_fs_request(rq) == 0 && rq->errors == 0)
+		else if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
 			rq->errors = -EIO;
 	}
 
@@ -307,7 +307,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
 {
 	ide_startstop_t startstop;
 
-	BUG_ON(!blk_rq_started(rq));
+	BUG_ON(!(rq->cmd_flags & REQ_STARTED));
 
 #ifdef DEBUG
 	printk("%s: start_request: current=0x%08lx\n",
@@ -353,7 +353,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
 			    pm->pm_step == IDE_PM_COMPLETED)
 				ide_complete_pm_rq(drive, rq);
 			return startstop;
-		} else if (!rq->rq_disk && blk_special_request(rq))
+		} else if (!rq->rq_disk && rq->cmd_type == REQ_TYPE_SPECIAL) {
 			/*
 			 * TODO: Once all ULDs have been modified to
 			 * check for specific op codes rather than
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index 1c08311b0a0e..92406097efeb 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -191,10 +191,10 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
 
 #ifdef DEBUG_PM
 	printk("%s: completing PM request, %s\n", drive->name,
-	       blk_pm_suspend_request(rq) ? "suspend" : "resume");
+	       (rq->cmd_type == REQ_TYPE_PM_SUSPEND) ? "suspend" : "resume");
 #endif
 	spin_lock_irqsave(q->queue_lock, flags);
-	if (blk_pm_suspend_request(rq))
+	if (rq->cmd_type == REQ_TYPE_PM_SUSPEND)
 		blk_stop_queue(q);
 	else
 		drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
@@ -210,11 +210,11 @@ void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
 {
 	struct request_pm_state *pm = rq->special;
 
-	if (blk_pm_suspend_request(rq) &&
+	if (rq->cmd_type == REQ_TYPE_PM_SUSPEND &&
 	    pm->pm_step == IDE_PM_START_SUSPEND)
 		/* Mark drive blocked when starting the suspend sequence. */
 		drive->dev_flags |= IDE_DFLAG_BLOCKED;
-	else if (blk_pm_resume_request(rq) &&
+	else if (rq->cmd_type == REQ_TYPE_PM_RESUME &&
 		 pm->pm_step == IDE_PM_START_RESUME) {
 		/*
 		 * The first thing we do on wakeup is to wait for BSY bit to
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index b07232880ec9..635fd72d4728 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -577,7 +577,8 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 		      rq->cmd[0], (unsigned long long)blk_rq_pos(rq),
 		      blk_rq_sectors(rq));
 
-	BUG_ON(!(blk_special_request(rq) || blk_sense_request(rq)));
+	BUG_ON(!(rq->cmd_type == REQ_TYPE_SPECIAL ||
+		 rq->cmd_type == REQ_TYPE_SENSE));
 
 	/* Retry a failed packet command */
 	if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index d21e1284604f..1e0e6dd51501 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -792,12 +792,12 @@ static void dm_end_request(struct request *clone, int error)
 {
 	int rw = rq_data_dir(clone);
 	int run_queue = 1;
-	bool is_barrier = blk_barrier_rq(clone);
+	bool is_barrier = clone->cmd_flags & REQ_HARDBARRIER;
 	struct dm_rq_target_io *tio = clone->end_io_data;
 	struct mapped_device *md = tio->md;
 	struct request *rq = tio->orig;
 
-	if (blk_pc_request(rq) && !is_barrier) {
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !is_barrier) {
 		rq->errors = clone->errors;
 		rq->resid_len = clone->resid_len;
 
@@ -844,7 +844,7 @@ void dm_requeue_unmapped_request(struct request *clone)
 	struct request_queue *q = rq->q;
 	unsigned long flags;
 
-	if (unlikely(blk_barrier_rq(clone))) {
+	if (unlikely(clone->cmd_flags & REQ_HARDBARRIER)) {
 		/*
 		 * Barrier clones share an original request.
 		 * Leave it to dm_end_request(), which handles this special
@@ -943,7 +943,7 @@ static void dm_complete_request(struct request *clone, int error)
 	struct dm_rq_target_io *tio = clone->end_io_data;
 	struct request *rq = tio->orig;
 
-	if (unlikely(blk_barrier_rq(clone))) {
+	if (unlikely(clone->cmd_flags & REQ_HARDBARRIER)) {
 		/*
 		 * Barrier clones share an original request.  So can't use
 		 * softirq_done with the original.
@@ -972,7 +972,7 @@ void dm_kill_unmapped_request(struct request *clone, int error)
 	struct dm_rq_target_io *tio = clone->end_io_data;
 	struct request *rq = tio->orig;
 
-	if (unlikely(blk_barrier_rq(clone))) {
+	if (unlikely(clone->cmd_flags & REQ_HARDBARRIER)) {
 		/*
 		 * Barrier clones share an original request.
 		 * Leave it to dm_end_request(), which handles this special
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 8327e248520a..56645408d225 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -805,7 +805,8 @@ static void mspro_block_start(struct memstick_dev *card)
 
 static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
 {
-	if (!blk_fs_request(req) && !blk_pc_request(req)) {
+	if (req->cmd_type != REQ_TYPE_FS &&
+	    req->cmd_type != REQ_TYPE_BLOCK_PC) {
 		blk_dump_rq_flags(req, "MSPro unsupported request");
 		return BLKPREP_KILL;
 	}
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index fc593fbab696..108f0c2b2bfd 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -883,7 +883,7 @@ static void i2o_block_request_fn(struct request_queue *q)
 		if (!req)
 			break;
 
-		if (blk_fs_request(req)) {
+		if (req->cmd_type == REQ_TYPE_FS) {
 			struct i2o_block_delayed_request *dreq;
 			struct i2o_block_request *ireq = req->special;
 			unsigned int queue_depth;
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index d6ded247d941..ec92bcbdeddb 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -32,7 +32,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
 	/*
 	 * We only like normal block requests.
 	 */
-	if (!blk_fs_request(req)) {
+	if (req->cmd_type != REQ_TYPE_FS) {
 		blk_dump_rq_flags(req, "MMC bad request");
 		return BLKPREP_KILL;
 	}
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 03e19c1965cc..475af42745cb 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -73,14 +73,14 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
 
 	buf = req->buffer;
 
-	if (!blk_fs_request(req))
+	if (req->cmd_type != REQ_TYPE_FS)
 		return -EIO;
 
 	if (blk_rq_pos(req) + blk_rq_cur_sectors(req) >
 	    get_capacity(req->rq_disk))
 		return -EIO;
 
-	if (blk_discard_rq(req))
+	if (req->cmd_flags & REQ_DISCARD)
 		return tr->discard(dev, block, nsect);
 
 	switch(rq_data_dir(req)) {
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index a5d630f5f519..1b88af89d0c7 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -307,7 +307,7 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
 		    (sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
 			return FAILED;
 
-		if (blk_barrier_rq(scmd->request))
+		if (scmd->request->cmd_flags & REQ_HARDBARRIER)
 			/*
 			 * barrier requests should always retry on UA
 			 * otherwise block will get a spurious error
@@ -1318,16 +1318,16 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
 	case DID_OK:
 		break;
 	case DID_BUS_BUSY:
-		return blk_failfast_transport(scmd->request);
+		return (scmd->request->cmd_flags & REQ_FAILFAST_TRANSPORT);
 	case DID_PARITY:
-		return blk_failfast_dev(scmd->request);
+		return (scmd->request->cmd_flags & REQ_FAILFAST_DEV);
 	case DID_ERROR:
 		if (msg_byte(scmd->result) == COMMAND_COMPLETE &&
 		    status_byte(scmd->result) == RESERVATION_CONFLICT)
 			return 0;
 		/* fall through */
 	case DID_SOFT_ERROR:
-		return blk_failfast_driver(scmd->request);
+		return (scmd->request->cmd_flags & REQ_FAILFAST_DRIVER);
 	}
 
 	switch (status_byte(scmd->result)) {
@@ -1336,7 +1336,7 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
 		 * assume caller has checked sense and determinted
 		 * the check condition was retryable.
 		 */
-		return blk_failfast_dev(scmd->request);
+		return (scmd->request->cmd_flags & REQ_FAILFAST_DEV);
 	}
 
 	return 0;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 1646fe7cbd4b..5f1160841b0e 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -722,7 +722,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
 			sense_deferred = scsi_sense_is_deferred(&sshdr);
 	}
 
-	if (blk_pc_request(req)) { /* SG_IO ioctl from block level */
+	if (req->cmd_type == REQ_TYPE_BLOCK_PC) { /* SG_IO ioctl from block level */
 		req->errors = result;
 		if (result) {
 			if (sense_valid && req->sense) {
@@ -757,7 +757,8 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
 		}
 	}
 
-	BUG_ON(blk_bidi_rq(req)); /* bidi not support for !blk_pc_request yet */
+	/* no bidi support for !REQ_TYPE_BLOCK_PC yet */
+	BUG_ON(blk_bidi_rq(req));
 
 	/*
 	 * Next deal with any sectors which we were able to correctly
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 8802e48bc063..a3fdf4dc59da 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -485,7 +485,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 	 * Discard request come in as REQ_TYPE_FS but we turn them into
 	 * block PC requests to make life easier.
 	 */
-	if (blk_discard_rq(rq))
+	if (rq->cmd_flags & REQ_DISCARD)
 		ret = sd_prepare_discard(rq);
 
 	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
@@ -636,7 +636,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 		SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD;
 		SCpnt->cmnd[7] = 0x18;
 		SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32;
-		SCpnt->cmnd[10] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
+		SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
 
 		/* LBA */
 		SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
@@ -661,7 +661,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 		SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
 	} else if (block > 0xffffffff) {
 		SCpnt->cmnd[0] += READ_16 - READ_6;
-		SCpnt->cmnd[1] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
+		SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
 		SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
 		SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
 		SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
@@ -682,7 +682,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 			this_count = 0xffff;
 
 		SCpnt->cmnd[0] += READ_10 - READ_6;
-		SCpnt->cmnd[1] = protect | (blk_fua_rq(rq) ? 0x8 : 0);
+		SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
 		SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
 		SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
 		SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
@@ -691,7 +691,7 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 		SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
 		SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
 	} else {
-		if (unlikely(blk_fua_rq(rq))) {
+		if (unlikely(rq->cmd_flags & REQ_FUA)) {
 			/*
 			 * This happens only if this drive failed
 			 * 10byte rw command with ILLEGAL_REQUEST
@@ -1112,7 +1112,7 @@ static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
 	u64 bad_lba;
 	int info_valid;
 
-	if (!blk_fs_request(scmd->request))
+	if (scmd->request->cmd_type != REQ_TYPE_FS)
 		return 0;
 
 	info_valid = scsi_get_sense_info_fld(scmd->sense_buffer,
diff --git a/drivers/scsi/sun3_NCR5380.c b/drivers/scsi/sun3_NCR5380.c
index b5838d547c68..713620ed70d9 100644
--- a/drivers/scsi/sun3_NCR5380.c
+++ b/drivers/scsi/sun3_NCR5380.c
@@ -2022,7 +2022,7 @@ static void NCR5380_information_transfer (struct Scsi_Host *instance)
 		if((count > SUN3_DMA_MINSIZE) && (sun3_dma_setup_done
 						  != cmd))
 		{
-			if(blk_fs_request(cmd->request)) {
+			if (cmd->request->cmd_type == REQ_TYPE_FS) {
 				sun3scsi_dma_setup(d, count,
 						   rq_data_dir(cmd->request));
 				sun3_dma_setup_done = cmd;
diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c
index e606cf0a2eb7..613f5880d135 100644
--- a/drivers/scsi/sun3_scsi.c
+++ b/drivers/scsi/sun3_scsi.c
@@ -524,7 +524,7 @@ static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
 						  struct scsi_cmnd *cmd,
 						  int write_flag)
 {
-	if(blk_fs_request(cmd->request))
+	if (cmd->request->cmd_type == REQ_TYPE_FS)
  		return wanted;
 	else
 		return 0;
diff --git a/drivers/scsi/sun3_scsi_vme.c b/drivers/scsi/sun3_scsi_vme.c
index aaa4fd0dd1b9..7c526b8e30ac 100644
--- a/drivers/scsi/sun3_scsi_vme.c
+++ b/drivers/scsi/sun3_scsi_vme.c
@@ -458,7 +458,7 @@ static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
 						  struct scsi_cmnd *cmd,
 						  int write_flag)
 {
-	if(blk_fs_request(cmd->request))
+	if (cmd->request->cmd_type == REQ_TYPE_FS)
  		return wanted;
 	else
 		return 0;
diff --git a/drivers/staging/hv/blkvsc_drv.c b/drivers/staging/hv/blkvsc_drv.c
index 61bd0be5fb18..a9aff90e58e0 100644
--- a/drivers/staging/hv/blkvsc_drv.c
+++ b/drivers/staging/hv/blkvsc_drv.c
@@ -823,7 +823,8 @@ static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req)
 			blkvsc_req->cmnd[0] = READ_16;
 		}
 
-		blkvsc_req->cmnd[1] |= blk_fua_rq(blkvsc_req->req) ? 0x8 : 0;
+		blkvsc_req->cmnd[1] |=
+			(blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
 
 		*(unsigned long long *)&blkvsc_req->cmnd[2] =
 				cpu_to_be64(blkvsc_req->sector_start);
@@ -839,7 +840,8 @@ static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req)
 			blkvsc_req->cmnd[0] = READ_10;
 		}
 
-		blkvsc_req->cmnd[1] |= blk_fua_rq(blkvsc_req->req) ? 0x8 : 0;
+		blkvsc_req->cmnd[1] |=
+			(blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
 
 		*(unsigned int *)&blkvsc_req->cmnd[2] =
 				cpu_to_be32(blkvsc_req->sector_start);
@@ -1286,7 +1288,7 @@ static void blkvsc_request(struct request_queue *queue)
 		DPRINT_DBG(BLKVSC_DRV, "- req %p\n", req);
 
 		blkdev = req->rq_disk->private_data;
-		if (blkdev->shutting_down || !blk_fs_request(req) ||
+		if (blkdev->shutting_down || req->cmd_type != REQ_TYPE_FS ||
 		    blkdev->media_not_present) {
 			__blk_end_request_cur(req, 0);
 			continue;
-- 
cgit v1.2.3


From 7b6d91daee5cac6402186ff224c3af39d79f4a0e Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Sat, 7 Aug 2010 18:20:39 +0200
Subject: block: unify flags for struct bio and struct request

Remove the current bio flags and reuse the request flags for the bio, too.
This allows to more easily trace the type of I/O from the filesystem
down to the block driver.  There were two flags in the bio that were
missing in the requests:  BIO_RW_UNPLUG and BIO_RW_AHEAD.  Also I've
renamed two request flags that had a superflous RW in them.

Note that the flags are in bio.h despite having the REQ_ name - as
blkdev.h includes bio.h that is the only way to go for now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/ata/libata-scsi.c          |  2 +-
 drivers/block/aoe/aoeblk.c         |  2 +-
 drivers/block/brd.c                |  2 +-
 drivers/block/drbd/drbd_actlog.c   |  8 ++++----
 drivers/block/drbd/drbd_main.c     |  6 +++---
 drivers/block/drbd/drbd_receiver.c | 22 +++++++++++-----------
 drivers/block/drbd/drbd_req.c      |  2 +-
 drivers/block/loop.c               |  2 +-
 drivers/block/pktcdvd.c            |  2 +-
 drivers/block/umem.c               |  2 +-
 drivers/ide/ide-cd_ioctl.c         |  2 +-
 drivers/ide/ide-floppy.c           |  2 +-
 drivers/md/dm-io.c                 | 12 ++++++------
 drivers/md/dm-kcopyd.c             |  2 +-
 drivers/md/dm-raid1.c              |  2 +-
 drivers/md/dm-stripe.c             |  2 +-
 drivers/md/dm.c                    | 14 +++++++-------
 drivers/md/linear.c                |  2 +-
 drivers/md/md.c                    | 10 +++++-----
 drivers/md/md.h                    |  4 ++--
 drivers/md/multipath.c             |  8 ++++----
 drivers/md/raid0.c                 |  2 +-
 drivers/md/raid1.c                 | 22 ++++++++++------------
 drivers/md/raid10.c                | 12 ++++++------
 drivers/md/raid5.c                 |  2 +-
 drivers/scsi/osd/osd_initiator.c   |  8 ++++----
 26 files changed, 77 insertions(+), 79 deletions(-)

(limited to 'drivers')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a5c08b082edb..0a8cd3484791 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1114,7 +1114,7 @@ static int atapi_drain_needed(struct request *rq)
 	if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
 		return 0;
 
-	if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_RW))
+	if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
 		return 0;
 
 	return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 035cefe4045a..65deffde60ac 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -173,7 +173,7 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
 		BUG();
 		bio_endio(bio, -ENXIO);
 		return 0;
-	} else if (bio_rw_flagged(bio, BIO_RW_BARRIER)) {
+	} else if (bio->bi_rw & REQ_HARDBARRIER) {
 		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	} else if (bio->bi_io_vec == NULL) {
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index f1bf79d9bc0a..1b218c6b6820 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -340,7 +340,7 @@ static int brd_make_request(struct request_queue *q, struct bio *bio)
 						get_capacity(bdev->bd_disk))
 		goto out;
 
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_DISCARD))) {
+	if (unlikely(bio->bi_rw & REQ_DISCARD)) {
 		err = 0;
 		discard_from_brd(brd, sector, bio->bi_size);
 		goto out;
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index df018990c422..9400845d602e 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -79,8 +79,8 @@ static int _drbd_md_sync_page_io(struct drbd_conf *mdev,
 	md_io.error = 0;
 
 	if ((rw & WRITE) && !test_bit(MD_NO_BARRIER, &mdev->flags))
-		rw |= (1 << BIO_RW_BARRIER);
-	rw |= ((1<<BIO_RW_UNPLUG) | (1<<BIO_RW_SYNCIO));
+		rw |= REQ_HARDBARRIER;
+	rw |= REQ_UNPLUG | REQ_SYNC;
 
  retry:
 	bio = bio_alloc(GFP_NOIO, 1);
@@ -103,11 +103,11 @@ static int _drbd_md_sync_page_io(struct drbd_conf *mdev,
 	/* check for unsupported barrier op.
 	 * would rather check on EOPNOTSUPP, but that is not reliable.
 	 * don't try again for ANY return value != 0 */
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER) && !ok)) {
+	if (unlikely((bio->bi_rw & REQ_HARDBARRIER) && !ok)) {
 		/* Try again with no barrier */
 		dev_warn(DEV, "Barriers not supported on meta data device - disabling\n");
 		set_bit(MD_NO_BARRIER, &mdev->flags);
-		rw &= ~(1 << BIO_RW_BARRIER);
+		rw &= ~REQ_HARDBARRIER;
 		bio_put(bio);
 		goto retry;
 	}
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 7258c95e895e..e2ab13d99d69 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2425,15 +2425,15 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
 	/* NOTE: no need to check if barriers supported here as we would
 	 *       not pass the test in make_request_common in that case
 	 */
-	if (bio_rw_flagged(req->master_bio, BIO_RW_BARRIER)) {
+	if (req->master_bio->bi_rw & REQ_HARDBARRIER) {
 		dev_err(DEV, "ASSERT FAILED would have set DP_HARDBARRIER\n");
 		/* dp_flags |= DP_HARDBARRIER; */
 	}
-	if (bio_rw_flagged(req->master_bio, BIO_RW_SYNCIO))
+	if (req->master_bio->bi_rw & REQ_SYNC)
 		dp_flags |= DP_RW_SYNC;
 	/* for now handle SYNCIO and UNPLUG
 	 * as if they still were one and the same flag */
-	if (bio_rw_flagged(req->master_bio, BIO_RW_UNPLUG))
+	if (req->master_bio->bi_rw & REQ_UNPLUG)
 		dp_flags |= DP_RW_SYNC;
 	if (mdev->state.conn >= C_SYNC_SOURCE &&
 	    mdev->state.conn <= C_PAUSED_SYNC_T)
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index dff48701b84d..cba1deb7b271 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1180,7 +1180,7 @@ next_bio:
 	bio->bi_sector = sector;
 	bio->bi_bdev = mdev->ldev->backing_bdev;
 	/* we special case some flags in the multi-bio case, see below
-	 * (BIO_RW_UNPLUG, BIO_RW_BARRIER) */
+	 * (REQ_UNPLUG, REQ_HARDBARRIER) */
 	bio->bi_rw = rw;
 	bio->bi_private = e;
 	bio->bi_end_io = drbd_endio_sec;
@@ -1209,16 +1209,16 @@ next_bio:
 		bios = bios->bi_next;
 		bio->bi_next = NULL;
 
-		/* strip off BIO_RW_UNPLUG unless it is the last bio */
+		/* strip off REQ_UNPLUG unless it is the last bio */
 		if (bios)
-			bio->bi_rw &= ~(1<<BIO_RW_UNPLUG);
+			bio->bi_rw &= ~REQ_UNPLUG;
 
 		drbd_generic_make_request(mdev, fault_type, bio);
 
-		/* strip off BIO_RW_BARRIER,
+		/* strip off REQ_HARDBARRIER,
 		 * unless it is the first or last bio */
 		if (bios && bios->bi_next)
-			bios->bi_rw &= ~(1<<BIO_RW_BARRIER);
+			bios->bi_rw &= ~REQ_HARDBARRIER;
 	} while (bios);
 	maybe_kick_lo(mdev);
 	return 0;
@@ -1233,7 +1233,7 @@ fail:
 }
 
 /**
- * w_e_reissue() - Worker callback; Resubmit a bio, without BIO_RW_BARRIER set
+ * w_e_reissue() - Worker callback; Resubmit a bio, without REQ_HARDBARRIER set
  * @mdev:	DRBD device.
  * @w:		work object.
  * @cancel:	The connection will be closed anyways (unused in this callback)
@@ -1245,7 +1245,7 @@ int w_e_reissue(struct drbd_conf *mdev, struct drbd_work *w, int cancel) __relea
 	   (and DE_BARRIER_IN_NEXT_EPOCH_ISSUED in the previous Epoch)
 	   so that we can finish that epoch in drbd_may_finish_epoch().
 	   That is necessary if we already have a long chain of Epochs, before
-	   we realize that BIO_RW_BARRIER is actually not supported */
+	   we realize that REQ_HARDBARRIER is actually not supported */
 
 	/* As long as the -ENOTSUPP on the barrier is reported immediately
 	   that will never trigger. If it is reported late, we will just
@@ -1824,14 +1824,14 @@ static int receive_Data(struct drbd_conf *mdev, struct p_header *h)
 		epoch = list_entry(e->epoch->list.prev, struct drbd_epoch, list);
 		if (epoch == e->epoch) {
 			set_bit(DE_CONTAINS_A_BARRIER, &e->epoch->flags);
-			rw |= (1<<BIO_RW_BARRIER);
+			rw |= REQ_HARDBARRIER;
 			e->flags |= EE_IS_BARRIER;
 		} else {
 			if (atomic_read(&epoch->epoch_size) > 1 ||
 			    !test_bit(DE_CONTAINS_A_BARRIER, &epoch->flags)) {
 				set_bit(DE_BARRIER_IN_NEXT_EPOCH_ISSUED, &epoch->flags);
 				set_bit(DE_CONTAINS_A_BARRIER, &e->epoch->flags);
-				rw |= (1<<BIO_RW_BARRIER);
+				rw |= REQ_HARDBARRIER;
 				e->flags |= EE_IS_BARRIER;
 			}
 		}
@@ -1841,10 +1841,10 @@ static int receive_Data(struct drbd_conf *mdev, struct p_header *h)
 	dp_flags = be32_to_cpu(p->dp_flags);
 	if (dp_flags & DP_HARDBARRIER) {
 		dev_err(DEV, "ASSERT FAILED would have submitted barrier request\n");
-		/* rw |= (1<<BIO_RW_BARRIER); */
+		/* rw |= REQ_HARDBARRIER; */
 	}
 	if (dp_flags & DP_RW_SYNC)
-		rw |= (1<<BIO_RW_SYNCIO) | (1<<BIO_RW_UNPLUG);
+		rw |= REQ_SYNC | REQ_UNPLUG;
 	if (dp_flags & DP_MAY_SET_IN_SYNC)
 		e->flags |= EE_MAY_SET_IN_SYNC;
 
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 654f1ef5cbb0..f761d98a4e90 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -997,7 +997,7 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
 	 * because of those XXX, this is not yet enabled,
 	 * i.e. in drbd_init_set_defaults we set the NO_BARRIER_SUPP bit.
 	 */
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER) && test_bit(NO_BARRIER_SUPP, &mdev->flags))) {
+	if (unlikely(bio->bi_rw & REQ_HARDBARRIER) && test_bit(NO_BARRIER_SUPP, &mdev->flags)) {
 		/* dev_warn(DEV, "Rejecting barrier request as underlying device does not support\n"); */
 		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6120922f459f..fedfdb7d3cdf 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -476,7 +476,7 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio)
 	pos = ((loff_t) bio->bi_sector << 9) + lo->lo_offset;
 
 	if (bio_rw(bio) == WRITE) {
-		bool barrier = bio_rw_flagged(bio, BIO_RW_BARRIER);
+		bool barrier = (bio->bi_rw & REQ_HARDBARRIER);
 		struct file *file = lo->lo_backing_file;
 
 		if (barrier) {
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 8a549db2aa78..9f3e4454274b 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1221,7 +1221,7 @@ static int pkt_start_recovery(struct packet_data *pkt)
 	pkt->bio->bi_flags = 1 << BIO_UPTODATE;
 	pkt->bio->bi_idx = 0;
 
-	BUG_ON(pkt->bio->bi_rw != (1 << BIO_RW));
+	BUG_ON(pkt->bio->bi_rw != REQ_WRITE);
 	BUG_ON(pkt->bio->bi_vcnt != pkt->frames);
 	BUG_ON(pkt->bio->bi_size != pkt->frames * CD_FRAMESIZE);
 	BUG_ON(pkt->bio->bi_end_io != pkt_end_io_packet_write);
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index 2f9470ff8f7c..8be57151f5d6 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -478,7 +478,7 @@ static void process_page(unsigned long data)
 				le32_to_cpu(desc->local_addr)>>9,
 				le32_to_cpu(desc->transfer_size));
 			dump_dmastat(card, control);
-		} else if (test_bit(BIO_RW, &bio->bi_rw) &&
+		} else if ((bio->bi_rw & REQ_WRITE) &&
 			   le32_to_cpu(desc->local_addr) >> 9 ==
 				card->init_size) {
 			card->init_size += le32_to_cpu(desc->transfer_size) >> 9;
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 02712bf045c1..766b3deeb23c 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -454,7 +454,7 @@ int ide_cdrom_packet(struct cdrom_device_info *cdi,
 	   touch it at all. */
 
 	if (cgc->data_direction == CGC_DATA_WRITE)
-		flags |= REQ_RW;
+		flags |= REQ_WRITE;
 
 	if (cgc->sense)
 		memset(cgc->sense, 0, sizeof(struct request_sense));
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index c7d0737bb18a..5406b6ea3ad1 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -207,7 +207,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
 	memcpy(rq->cmd, pc->c, 12);
 
 	pc->rq = rq;
-	if (rq->cmd_flags & REQ_RW)
+	if (rq->cmd_flags & REQ_WRITE)
 		pc->flags |= PC_FLAG_WRITING;
 
 	pc->flags |= PC_FLAG_DMA_OK;
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 10f457ca6af2..0590c75b0ab6 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -356,7 +356,7 @@ static void dispatch_io(int rw, unsigned int num_regions,
 	BUG_ON(num_regions > DM_IO_MAX_REGIONS);
 
 	if (sync)
-		rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
+		rw |= REQ_SYNC | REQ_UNPLUG;
 
 	/*
 	 * For multiple regions we need to be careful to rewind
@@ -364,7 +364,7 @@ static void dispatch_io(int rw, unsigned int num_regions,
 	 */
 	for (i = 0; i < num_regions; i++) {
 		*dp = old_pages;
-		if (where[i].count || (rw & (1 << BIO_RW_BARRIER)))
+		if (where[i].count || (rw & REQ_HARDBARRIER))
 			do_region(rw, i, where + i, dp, io);
 	}
 
@@ -412,8 +412,8 @@ retry:
 	}
 	set_current_state(TASK_RUNNING);
 
-	if (io->eopnotsupp_bits && (rw & (1 << BIO_RW_BARRIER))) {
-		rw &= ~(1 << BIO_RW_BARRIER);
+	if (io->eopnotsupp_bits && (rw & REQ_HARDBARRIER)) {
+		rw &= ~REQ_HARDBARRIER;
 		goto retry;
 	}
 
@@ -479,8 +479,8 @@ static int dp_init(struct dm_io_request *io_req, struct dpages *dp)
  * New collapsed (a)synchronous interface.
  *
  * If the IO is asynchronous (i.e. it has notify.fn), you must either unplug
- * the queue with blk_unplug() some time later or set the BIO_RW_SYNC bit in
- * io_req->bi_rw. If you fail to do one of these, the IO will be submitted to
+ * the queue with blk_unplug() some time later or set REQ_SYNC in
+io_req->bi_rw. If you fail to do one of these, the IO will be submitted to
  * the disk after q->unplug_delay, which defaults to 3ms in blk-settings.c.
  */
 int dm_io(struct dm_io_request *io_req, unsigned num_regions,
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index addf83475040..d8587bac5682 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -345,7 +345,7 @@ static int run_io_job(struct kcopyd_job *job)
 {
 	int r;
 	struct dm_io_request io_req = {
-		.bi_rw = job->rw | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG),
+		.bi_rw = job->rw | REQ_SYNC | REQ_UNPLUG,
 		.mem.type = DM_IO_PAGE_LIST,
 		.mem.ptr.pl = job->pages,
 		.mem.offset = job->offset,
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index ddda531723dc..74136262d654 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -1211,7 +1211,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
 	if (error == -EOPNOTSUPP)
 		goto out;
 
-	if ((error == -EWOULDBLOCK) && bio_rw_flagged(bio, BIO_RW_AHEAD))
+	if ((error == -EWOULDBLOCK) && (bio->bi_rw & REQ_RAHEAD))
 		goto out;
 
 	if (unlikely(error)) {
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index e610725db766..d6e28d732b4d 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -284,7 +284,7 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio,
 	if (!error)
 		return 0; /* I/O complete */
 
-	if ((error == -EWOULDBLOCK) && bio_rw_flagged(bio, BIO_RW_AHEAD))
+	if ((error == -EWOULDBLOCK) && (bio->bi_rw & REQ_RAHEAD))
 		return error;
 
 	if (error == -EOPNOTSUPP)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 1e0e6dd51501..d6f77baeafd6 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -614,7 +614,7 @@ static void dec_pending(struct dm_io *io, int error)
 			 */
 			spin_lock_irqsave(&md->deferred_lock, flags);
 			if (__noflush_suspending(md)) {
-				if (!bio_rw_flagged(io->bio, BIO_RW_BARRIER))
+				if (!(io->bio->bi_rw & REQ_HARDBARRIER))
 					bio_list_add_head(&md->deferred,
 							  io->bio);
 			} else
@@ -626,7 +626,7 @@ static void dec_pending(struct dm_io *io, int error)
 		io_error = io->error;
 		bio = io->bio;
 
-		if (bio_rw_flagged(bio, BIO_RW_BARRIER)) {
+		if (bio->bi_rw & REQ_HARDBARRIER) {
 			/*
 			 * There can be just one barrier request so we use
 			 * a per-device variable for error reporting.
@@ -1106,7 +1106,7 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector,
 
 	clone->bi_sector = sector;
 	clone->bi_bdev = bio->bi_bdev;
-	clone->bi_rw = bio->bi_rw & ~(1 << BIO_RW_BARRIER);
+	clone->bi_rw = bio->bi_rw & ~REQ_HARDBARRIER;
 	clone->bi_vcnt = 1;
 	clone->bi_size = to_bytes(len);
 	clone->bi_io_vec->bv_offset = offset;
@@ -1133,7 +1133,7 @@ static struct bio *clone_bio(struct bio *bio, sector_t sector,
 
 	clone = bio_alloc_bioset(GFP_NOIO, bio->bi_max_vecs, bs);
 	__bio_clone(clone, bio);
-	clone->bi_rw &= ~(1 << BIO_RW_BARRIER);
+	clone->bi_rw &= ~REQ_HARDBARRIER;
 	clone->bi_destructor = dm_bio_destructor;
 	clone->bi_sector = sector;
 	clone->bi_idx = idx;
@@ -1301,7 +1301,7 @@ static void __split_and_process_bio(struct mapped_device *md, struct bio *bio)
 
 	ci.map = dm_get_live_table(md);
 	if (unlikely(!ci.map)) {
-		if (!bio_rw_flagged(bio, BIO_RW_BARRIER))
+		if (!(bio->bi_rw & REQ_HARDBARRIER))
 			bio_io_error(bio);
 		else
 			if (!md->barrier_error)
@@ -1414,7 +1414,7 @@ static int _dm_request(struct request_queue *q, struct bio *bio)
 	 * we have to queue this io for later.
 	 */
 	if (unlikely(test_bit(DMF_QUEUE_IO_TO_THREAD, &md->flags)) ||
-	    unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+	    unlikely(bio->bi_rw & REQ_HARDBARRIER)) {
 		up_read(&md->io_lock);
 
 		if (unlikely(test_bit(DMF_BLOCK_IO_FOR_SUSPEND, &md->flags)) &&
@@ -2296,7 +2296,7 @@ static void dm_wq_work(struct work_struct *work)
 		if (dm_request_based(md))
 			generic_make_request(c);
 		else {
-			if (bio_rw_flagged(c, BIO_RW_BARRIER))
+			if (c->bi_rw & REQ_HARDBARRIER)
 				process_barrier(md, c);
 			else
 				__split_and_process_bio(md, c);
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 7e0e057db9a7..ba19060bcf3f 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -294,7 +294,7 @@ static int linear_make_request (mddev_t *mddev, struct bio *bio)
 	dev_info_t *tmp_dev;
 	sector_t start_sector;
 
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+	if (unlikely(bio->bi_rw & REQ_HARDBARRIER)) {
 		md_barrier_request(mddev, bio);
 		return 0;
 	}
diff --git a/drivers/md/md.c b/drivers/md/md.c
index cb20d0b0555a..1893af678779 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -353,7 +353,7 @@ static void md_submit_barrier(struct work_struct *ws)
 		/* an empty barrier - all done */
 		bio_endio(bio, 0);
 	else {
-		bio->bi_rw &= ~(1<<BIO_RW_BARRIER);
+		bio->bi_rw &= ~REQ_HARDBARRIER;
 		if (mddev->pers->make_request(mddev, bio))
 			generic_make_request(bio);
 		mddev->barrier = POST_REQUEST_BARRIER;
@@ -675,11 +675,11 @@ void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
 	 * if zero is reached.
 	 * If an error occurred, call md_error
 	 *
-	 * As we might need to resubmit the request if BIO_RW_BARRIER
+	 * As we might need to resubmit the request if REQ_HARDBARRIER
 	 * causes ENOTSUPP, we allocate a spare bio...
 	 */
 	struct bio *bio = bio_alloc(GFP_NOIO, 1);
-	int rw = (1<<BIO_RW) | (1<<BIO_RW_SYNCIO) | (1<<BIO_RW_UNPLUG);
+	int rw = REQ_WRITE | REQ_SYNC | REQ_UNPLUG;
 
 	bio->bi_bdev = rdev->bdev;
 	bio->bi_sector = sector;
@@ -691,7 +691,7 @@ void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
 	atomic_inc(&mddev->pending_writes);
 	if (!test_bit(BarriersNotsupp, &rdev->flags)) {
 		struct bio *rbio;
-		rw |= (1<<BIO_RW_BARRIER);
+		rw |= REQ_HARDBARRIER;
 		rbio = bio_clone(bio, GFP_NOIO);
 		rbio->bi_private = bio;
 		rbio->bi_end_io = super_written_barrier;
@@ -736,7 +736,7 @@ int sync_page_io(struct block_device *bdev, sector_t sector, int size,
 	struct completion event;
 	int ret;
 
-	rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
+	rw |= REQ_SYNC | REQ_UNPLUG;
 
 	bio->bi_bdev = bdev;
 	bio->bi_sector = sector;
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 10597bfec000..fc56e0f21c80 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -67,7 +67,7 @@ struct mdk_rdev_s
 #define	Faulty		1		/* device is known to have a fault */
 #define	In_sync		2		/* device is in_sync with rest of array */
 #define	WriteMostly	4		/* Avoid reading if at all possible */
-#define	BarriersNotsupp	5		/* BIO_RW_BARRIER is not supported */
+#define	BarriersNotsupp	5		/* REQ_HARDBARRIER is not supported */
 #define	AllReserved	6		/* If whole device is reserved for
 					 * one array */
 #define	AutoDetected	7		/* added by auto-detect */
@@ -254,7 +254,7 @@ struct mddev_s
 							 * fails.  Only supported
 							 */
 	struct bio			*biolist; 	/* bios that need to be retried
-							 * because BIO_RW_BARRIER is not supported
+							 * because REQ_HARDBARRIER is not supported
 							 */
 
 	atomic_t			recovery_active; /* blocks scheduled, but not written */
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 410fb60699ac..0307d217e7a4 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -91,7 +91,7 @@ static void multipath_end_request(struct bio *bio, int error)
 
 	if (uptodate)
 		multipath_end_bh_io(mp_bh, 0);
-	else if (!bio_rw_flagged(bio, BIO_RW_AHEAD)) {
+	else if (!(bio->bi_rw & REQ_RAHEAD)) {
 		/*
 		 * oops, IO error:
 		 */
@@ -142,7 +142,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
 	struct multipath_bh * mp_bh;
 	struct multipath_info *multipath;
 
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+	if (unlikely(bio->bi_rw & REQ_HARDBARRIER)) {
 		md_barrier_request(mddev, bio);
 		return 0;
 	}
@@ -163,7 +163,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
 	mp_bh->bio = *bio;
 	mp_bh->bio.bi_sector += multipath->rdev->data_offset;
 	mp_bh->bio.bi_bdev = multipath->rdev->bdev;
-	mp_bh->bio.bi_rw |= (1 << BIO_RW_FAILFAST_TRANSPORT);
+	mp_bh->bio.bi_rw |= REQ_FAILFAST_TRANSPORT;
 	mp_bh->bio.bi_end_io = multipath_end_request;
 	mp_bh->bio.bi_private = mp_bh;
 	generic_make_request(&mp_bh->bio);
@@ -398,7 +398,7 @@ static void multipathd (mddev_t *mddev)
 			*bio = *(mp_bh->master_bio);
 			bio->bi_sector += conf->multipaths[mp_bh->path].rdev->data_offset;
 			bio->bi_bdev = conf->multipaths[mp_bh->path].rdev->bdev;
-			bio->bi_rw |= (1 << BIO_RW_FAILFAST_TRANSPORT);
+			bio->bi_rw |= REQ_FAILFAST_TRANSPORT;
 			bio->bi_end_io = multipath_end_request;
 			bio->bi_private = mp_bh;
 			generic_make_request(bio);
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 563abed5a2cb..6f7af46d623c 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -483,7 +483,7 @@ static int raid0_make_request(mddev_t *mddev, struct bio *bio)
 	struct strip_zone *zone;
 	mdk_rdev_t *tmp_dev;
 
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+	if (unlikely(bio->bi_rw & REQ_HARDBARRIER)) {
 		md_barrier_request(mddev, bio);
 		return 0;
 	}
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a948da8012de..73cc74ffc26b 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -787,7 +787,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 	struct bio_list bl;
 	struct page **behind_pages = NULL;
 	const int rw = bio_data_dir(bio);
-	const bool do_sync = bio_rw_flagged(bio, BIO_RW_SYNCIO);
+	const bool do_sync = (bio->bi_rw & REQ_SYNC);
 	bool do_barriers;
 	mdk_rdev_t *blocked_rdev;
 
@@ -822,7 +822,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 		finish_wait(&conf->wait_barrier, &w);
 	}
 	if (unlikely(!mddev->barriers_work &&
-		     bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+		     (bio->bi_rw & REQ_HARDBARRIER))) {
 		if (rw == WRITE)
 			md_write_end(mddev);
 		bio_endio(bio, -EOPNOTSUPP);
@@ -877,7 +877,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 		read_bio->bi_sector = r1_bio->sector + mirror->rdev->data_offset;
 		read_bio->bi_bdev = mirror->rdev->bdev;
 		read_bio->bi_end_io = raid1_end_read_request;
-		read_bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
+		read_bio->bi_rw = READ | do_sync;
 		read_bio->bi_private = r1_bio;
 
 		generic_make_request(read_bio);
@@ -959,7 +959,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 	atomic_set(&r1_bio->remaining, 0);
 	atomic_set(&r1_bio->behind_remaining, 0);
 
-	do_barriers = bio_rw_flagged(bio, BIO_RW_BARRIER);
+	do_barriers = bio->bi_rw & REQ_HARDBARRIER;
 	if (do_barriers)
 		set_bit(R1BIO_Barrier, &r1_bio->state);
 
@@ -975,8 +975,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 		mbio->bi_sector	= r1_bio->sector + conf->mirrors[i].rdev->data_offset;
 		mbio->bi_bdev = conf->mirrors[i].rdev->bdev;
 		mbio->bi_end_io	= raid1_end_write_request;
-		mbio->bi_rw = WRITE | (do_barriers << BIO_RW_BARRIER) |
-			(do_sync << BIO_RW_SYNCIO);
+		mbio->bi_rw = WRITE | do_barriers | do_sync;
 		mbio->bi_private = r1_bio;
 
 		if (behind_pages) {
@@ -1633,7 +1632,7 @@ static void raid1d(mddev_t *mddev)
 			sync_request_write(mddev, r1_bio);
 			unplug = 1;
 		} else if (test_bit(R1BIO_BarrierRetry, &r1_bio->state)) {
-			/* some requests in the r1bio were BIO_RW_BARRIER
+			/* some requests in the r1bio were REQ_HARDBARRIER
 			 * requests which failed with -EOPNOTSUPP.  Hohumm..
 			 * Better resubmit without the barrier.
 			 * We know which devices to resubmit for, because
@@ -1641,7 +1640,7 @@ static void raid1d(mddev_t *mddev)
 			 * We already have a nr_pending reference on these rdevs.
 			 */
 			int i;
-			const bool do_sync = bio_rw_flagged(r1_bio->master_bio, BIO_RW_SYNCIO);
+			const bool do_sync = (r1_bio->master_bio->bi_rw & REQ_SYNC);
 			clear_bit(R1BIO_BarrierRetry, &r1_bio->state);
 			clear_bit(R1BIO_Barrier, &r1_bio->state);
 			for (i=0; i < conf->raid_disks; i++)
@@ -1662,8 +1661,7 @@ static void raid1d(mddev_t *mddev)
 						conf->mirrors[i].rdev->data_offset;
 					bio->bi_bdev = conf->mirrors[i].rdev->bdev;
 					bio->bi_end_io = raid1_end_write_request;
-					bio->bi_rw = WRITE |
-						(do_sync << BIO_RW_SYNCIO);
+					bio->bi_rw = WRITE | do_sync;
 					bio->bi_private = r1_bio;
 					r1_bio->bios[i] = bio;
 					generic_make_request(bio);
@@ -1698,7 +1696,7 @@ static void raid1d(mddev_t *mddev)
 				       (unsigned long long)r1_bio->sector);
 				raid_end_bio_io(r1_bio);
 			} else {
-				const bool do_sync = bio_rw_flagged(r1_bio->master_bio, BIO_RW_SYNCIO);
+				const bool do_sync = r1_bio->master_bio->bi_rw & REQ_SYNC;
 				r1_bio->bios[r1_bio->read_disk] =
 					mddev->ro ? IO_BLOCKED : NULL;
 				r1_bio->read_disk = disk;
@@ -1715,7 +1713,7 @@ static void raid1d(mddev_t *mddev)
 				bio->bi_sector = r1_bio->sector + rdev->data_offset;
 				bio->bi_bdev = rdev->bdev;
 				bio->bi_end_io = raid1_end_read_request;
-				bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
+				bio->bi_rw = READ | do_sync;
 				bio->bi_private = r1_bio;
 				unplug = 1;
 				generic_make_request(bio);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 42e64e4e5e25..62ecb6650fd0 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -799,12 +799,12 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 	int i;
 	int chunk_sects = conf->chunk_mask + 1;
 	const int rw = bio_data_dir(bio);
-	const bool do_sync = bio_rw_flagged(bio, BIO_RW_SYNCIO);
+	const bool do_sync = (bio->bi_rw & REQ_SYNC);
 	struct bio_list bl;
 	unsigned long flags;
 	mdk_rdev_t *blocked_rdev;
 
-	if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+	if (unlikely(bio->bi_rw & REQ_HARDBARRIER)) {
 		md_barrier_request(mddev, bio);
 		return 0;
 	}
@@ -879,7 +879,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 			mirror->rdev->data_offset;
 		read_bio->bi_bdev = mirror->rdev->bdev;
 		read_bio->bi_end_io = raid10_end_read_request;
-		read_bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
+		read_bio->bi_rw = READ | do_sync;
 		read_bio->bi_private = r10_bio;
 
 		generic_make_request(read_bio);
@@ -947,7 +947,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
 			conf->mirrors[d].rdev->data_offset;
 		mbio->bi_bdev = conf->mirrors[d].rdev->bdev;
 		mbio->bi_end_io	= raid10_end_write_request;
-		mbio->bi_rw = WRITE | (do_sync << BIO_RW_SYNCIO);
+		mbio->bi_rw = WRITE | do_sync;
 		mbio->bi_private = r10_bio;
 
 		atomic_inc(&r10_bio->remaining);
@@ -1716,7 +1716,7 @@ static void raid10d(mddev_t *mddev)
 				raid_end_bio_io(r10_bio);
 				bio_put(bio);
 			} else {
-				const bool do_sync = bio_rw_flagged(r10_bio->master_bio, BIO_RW_SYNCIO);
+				const bool do_sync = (r10_bio->master_bio->bi_rw & REQ_SYNC);
 				bio_put(bio);
 				rdev = conf->mirrors[mirror].rdev;
 				if (printk_ratelimit())
@@ -1730,7 +1730,7 @@ static void raid10d(mddev_t *mddev)
 				bio->bi_sector = r10_bio->devs[r10_bio->read_slot].addr
 					+ rdev->data_offset;
 				bio->bi_bdev = rdev->bdev;
-				bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
+				bio->bi_rw = READ | do_sync;
 				bio->bi_private = r10_bio;
 				bio->bi_end_io = raid10_end_read_request;
 				unplug = 1;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 96c690279fc6..20ac2f14376a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3958,7 +3958,7 @@ static int make_request(mddev_t *mddev, struct bio * bi)
 	const int rw = bio_data_dir(bi);
 	int remaining;
 
-	if (unlikely(bio_rw_flagged(bi, BIO_RW_BARRIER))) {
+	if (unlikely(bi->bi_rw & REQ_HARDBARRIER)) {
 		/* Drain all pending writes.  We only really need
 		 * to ensure they have been submitted, but this is
 		 * easier.
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index ee4b6914667f..fda4de3440c4 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -716,7 +716,7 @@ static int _osd_req_list_objects(struct osd_request *or,
 		return PTR_ERR(bio);
 	}
 
-	bio->bi_rw &= ~(1 << BIO_RW);
+	bio->bi_rw &= ~REQ_WRITE;
 	or->in.bio = bio;
 	or->in.total_bytes = bio->bi_size;
 	return 0;
@@ -814,7 +814,7 @@ void osd_req_write(struct osd_request *or,
 {
 	_osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
 	WARN_ON(or->out.bio || or->out.total_bytes);
-	WARN_ON(0 ==  bio_rw_flagged(bio, BIO_RW));
+	WARN_ON(0 == (bio->bi_rw & REQ_WRITE));
 	or->out.bio = bio;
 	or->out.total_bytes = len;
 }
@@ -829,7 +829,7 @@ int osd_req_write_kern(struct osd_request *or,
 	if (IS_ERR(bio))
 		return PTR_ERR(bio);
 
-	bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
+	bio->bi_rw |= REQ_WRITE; /* FIXME: bio_set_dir() */
 	osd_req_write(or, obj, offset, bio, len);
 	return 0;
 }
@@ -865,7 +865,7 @@ void osd_req_read(struct osd_request *or,
 {
 	_osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
 	WARN_ON(or->in.bio || or->in.total_bytes);
-	WARN_ON(1 == bio_rw_flagged(bio, BIO_RW));
+	WARN_ON(1 == (bio->bi_rw & REQ_WRITE));
 	or->in.bio = bio;
 	or->in.total_bytes = len;
 }
-- 
cgit v1.2.3


From 15fa6e81650a167f82dc0d478f290f1cffa9183d Mon Sep 17 00:00:00 2001
From: Jens Axboe <jaxboe@fusionio.com>
Date: Fri, 18 Jun 2010 12:10:18 +0200
Subject: virtio_blk: add default case to cmd type switch
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

On compilation, gcc correctly detects that we do not handle
all types:

In function ‘blk_done’:
warning: enumeration value ‘REQ_TYPE_FS’ not handled in switch
warning: enumeration value ‘REQ_TYPE_SENSE’ not handled in switch
warning: enumeration value ‘REQ_TYPE_PM_SUSPEND’ not handled in switch
warning: enumeration value ‘REQ_TYPE_PM_RESUME’ not handled in switch
warning: enumeration value ‘REQ_TYPE_PM_SHUTDOWN’ not handled in switch
warning: enumeration value ‘REQ_TYPE_LINUX_BLOCK’ not handled in switch
warning: enumeration value ‘REQ_TYPE_ATA_TASKFILE’ not handled in switch
warning: enumeration value ‘REQ_TYPE_ATA_PC’ not handled in switch

which is a bit pointless since this is at the end of the request
processessing. Add a default case that just breaks out.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/virtio_blk.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers')

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 774144334ece..b5ebcd33bdb6 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -74,6 +74,8 @@ static void blk_done(struct virtqueue *vq)
 		case REQ_TYPE_SPECIAL:
 			vbr->req->errors = (error != 0);
 			break;
+		default:
+			break;
 		}
 
 		__blk_end_request_all(vbr->req, error);
-- 
cgit v1.2.3


From 4c4762d10faf93167b84ee03e4b58dd62012b06f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Sat, 19 Jun 2010 17:26:47 +0200
Subject: block: fix some more cmd_type cleanup fallout

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/ub.c      | 2 +-
 drivers/ide/ide-atapi.c | 6 +++---
 drivers/ide/ide-cd.c    | 4 ++--
 drivers/ide/ide-io.c    | 2 +-
 4 files changed, 7 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 034b34440ffa..aaf27fb4efd6 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -648,7 +648,7 @@ static int ub_request_fn_1(struct ub_lun *lun, struct request *rq)
 		return 0;
 	}
 
-	if (lun->changed && rq->cmd_type != REQ_TYPE_BLOCK_PC)
+	if (lun->changed && rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 		blk_start_request(rq);
 		ub_end_rq(rq, SAM_STAT_CHECK_CONDITION);
 		return 0;
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 3117a894d20e..e88a2cf17711 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -307,7 +307,7 @@ EXPORT_SYMBOL_GPL(ide_cd_expiry);
 
 int ide_cd_get_xferlen(struct request *rq)
 {
-	switch (rq->cmd_type)
+	switch (rq->cmd_type) {
 	case REQ_TYPE_FS:
 		return 32768;
 	case REQ_TYPE_SENSE:
@@ -477,12 +477,12 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 		if (uptodate == 0)
 			drive->failed_pc = NULL;
 
-		if (rq->cmd_type == REQ_TYPE_SPECIAL)
+		if (rq->cmd_type == REQ_TYPE_SPECIAL) {
 			rq->errors = 0;
 			error = 0;
 		} else {
 
-			if (req->cmd_type != REQ_TYPE_FS && uptodate <= 0) {
+			if (rq->cmd_type != REQ_TYPE_FS && uptodate <= 0) {
 				if (rq->errors == 0)
 					rq->errors = -EIO;
 			}
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 26a3688de467..ef7e3a9bee51 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -318,7 +318,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 			cdrom_saw_media_change(drive);
 
 			if (rq->cmd_type == REQ_TYPE_FS &&
-			    !(rq->cmd_flags & REQ_QUIET)) {
+			    !(rq->cmd_flags & REQ_QUIET))
 				printk(KERN_ERR PFX "%s: tray open\n",
 					drive->name);
 		}
@@ -375,7 +375,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		do_end_request = 1;
 		break;
 	default:
-		if (req->cmd_type != REQ_TYPE_FS)
+		if (rq->cmd_type != REQ_TYPE_FS)
 			break;
 		if (err & ~ATA_ABORTED) {
 			/* go to the default handler for other errors */
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 9304a7e54d9e..a381be814070 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -353,7 +353,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
 			    pm->pm_step == IDE_PM_COMPLETED)
 				ide_complete_pm_rq(drive, rq);
 			return startstop;
-		} else if (!rq->rq_disk && rq->cmd_type == REQ_TYPE_SPECIAL) {
+		} else if (!rq->rq_disk && rq->cmd_type == REQ_TYPE_SPECIAL)
 			/*
 			 * TODO: Once all ULDs have been modified to
 			 * check for specific op codes rather than
-- 
cgit v1.2.3


From 66ac0280197981f88774e74b60c8e5f9f07c1dba Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 18 Jun 2010 16:59:42 +0200
Subject: block: don't allocate a payload for discard request

Allocating a fixed payload for discard requests always was a horrible hack,
and it's not coming to byte us when adding support for discard in DM/MD.

So change the code to leave the allocation of a payload to the lowlevel
driver.  Unfortunately that means we'll need another hack, which allows
us to update the various block layer length fields indicating that we
have a payload.  Instead of hiding this in sd.c, which we already partially
do for UNMAP support add a documented helper in the core block layer for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 52 ++++++++++++++++++++++++++++++++++------------------
 1 file changed, 34 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index a3fdf4dc59da..86da819c70eb 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -411,22 +411,25 @@ static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif)
 }
 
 /**
- * sd_prepare_discard - unmap blocks on thinly provisioned device
+ * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device
+ * @sdp: scsi device to operate one
  * @rq: Request to prepare
  *
  * Will issue either UNMAP or WRITE SAME(16) depending on preference
  * indicated by target device.
  **/
-static int sd_prepare_discard(struct request *rq)
+static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 {
 	struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
 	struct bio *bio = rq->bio;
 	sector_t sector = bio->bi_sector;
-	unsigned int num = bio_sectors(bio);
+	unsigned int nr_sectors = bio_sectors(bio);
+	unsigned int len;
+	struct page *page;
 
 	if (sdkp->device->sector_size == 4096) {
 		sector >>= 3;
-		num >>= 3;
+		nr_sectors >>= 3;
 	}
 
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
@@ -434,31 +437,35 @@ static int sd_prepare_discard(struct request *rq)
 
 	memset(rq->cmd, 0, rq->cmd_len);
 
+	page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
+	if (!page)
+		return BLKPREP_DEFER;
+
 	if (sdkp->unmap) {
-		char *buf = kmap_atomic(bio_page(bio), KM_USER0);
+		char *buf = page_address(page);
 
+		rq->cmd_len = 10;
 		rq->cmd[0] = UNMAP;
 		rq->cmd[8] = 24;
-		rq->cmd_len = 10;
-
-		/* Ensure that data length matches payload */
-		rq->__data_len = bio->bi_size = bio->bi_io_vec->bv_len = 24;
 
 		put_unaligned_be16(6 + 16, &buf[0]);
 		put_unaligned_be16(16, &buf[2]);
 		put_unaligned_be64(sector, &buf[8]);
-		put_unaligned_be32(num, &buf[16]);
+		put_unaligned_be32(nr_sectors, &buf[16]);
 
-		kunmap_atomic(buf, KM_USER0);
+		len = 24;
 	} else {
+		rq->cmd_len = 16;
 		rq->cmd[0] = WRITE_SAME_16;
 		rq->cmd[1] = 0x8; /* UNMAP */
 		put_unaligned_be64(sector, &rq->cmd[2]);
-		put_unaligned_be32(num, &rq->cmd[10]);
-		rq->cmd_len = 16;
+		put_unaligned_be32(nr_sectors, &rq->cmd[10]);
+
+		len = sdkp->device->sector_size;
 	}
 
-	return BLKPREP_OK;
+	blk_add_request_payload(rq, page, len);
+	return scsi_setup_blk_pc_cmnd(sdp, rq);
 }
 
 /**
@@ -485,10 +492,10 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 	 * Discard request come in as REQ_TYPE_FS but we turn them into
 	 * block PC requests to make life easier.
 	 */
-	if (rq->cmd_flags & REQ_DISCARD)
-		ret = sd_prepare_discard(rq);
-
-	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
+	if (rq->cmd_flags & REQ_DISCARD) {
+		ret = scsi_setup_discard_cmnd(sdp, rq);
+		goto out;
+	} else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		ret = scsi_setup_blk_pc_cmnd(sdp, rq);
 		goto out;
 	} else if (rq->cmd_type != REQ_TYPE_FS) {
@@ -1163,6 +1170,15 @@ static int sd_done(struct scsi_cmnd *SCpnt)
 	int sense_valid = 0;
 	int sense_deferred = 0;
 
+	/*
+	 * If this is a discard request that originated from the kernel
+	 * we need to free our payload here.  Note that we need to check
+	 * the request flag as the normal payload rules apply for
+	 * pass-through UNMAP / WRITE SAME requests.
+	 */
+	if (SCpnt->request->cmd_flags & REQ_DISCARD)
+		__free_page(bio_page(SCpnt->request->bio));
+
 	if (result) {
 		sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
 		if (sense_valid)
-- 
cgit v1.2.3


From 511d37af66246c67f65e7896c230bdb81d853b6c Mon Sep 17 00:00:00 2001
From: Randy Dunlap <randy.dunlap@oracle.com>
Date: Tue, 22 Jun 2010 09:03:43 -0700
Subject: block/xd.c: fix brace typo

Fix extra brace typo that is causing build errors.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 4dc298376098..b16a3a926cf2 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -322,7 +322,7 @@ static void do_xd_request (struct request_queue * q)
 		int res = -EIO;
 		int retry;
 
-		if (req->cmd_type != REQ_TYPE_FS) {
+		if (req->cmd_type != REQ_TYPE_FS)
 			goto done;
 		if (block + count > get_capacity(req->rq_disk))
 			goto done;
-- 
cgit v1.2.3


From e597cd09f711b28b8466ebdc2f12e55b44fa81e4 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Thu, 1 Jul 2010 08:24:32 +0200
Subject: drivers/cdrom: use pr_<level>

- add pr_fmt.

- convert printks to pr_<level>

- add if (0) and printf argument checking to cdinfo

- coalesce consecutive printks to single pr_

- fix a typo "back ground" to "background"

- convert printks without level to pr_info

- remove VIOCD_ prefixes and use pr_fmt/pr_<level>

- add a missing newline to an OS/400 message

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Folded in tab indentation fix from Andrew.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/cdrom/cdrom.c | 46 +++++++++++++++-------------
 drivers/cdrom/gdrom.c | 27 ++++++++---------
 drivers/cdrom/viocd.c | 83 +++++++++++++++++++++------------------------------
 3 files changed, 73 insertions(+), 83 deletions(-)

(limited to 'drivers')

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index e3749d0ba68b..af13c62dc473 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -242,6 +242,8 @@
 
 -------------------------------------------------------------------------*/
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #define REVISION "Revision: 3.20"
 #define VERSION "Id: cdrom.c 3.20 2003/12/17"
 
@@ -314,11 +316,17 @@ static const char *mrw_format_status[] = {
 static const char *mrw_address_space[] = { "DMA", "GAA" };
 
 #if (ERRLOGMASK!=CD_NOTHING)
-#define cdinfo(type, fmt, args...) \
-        if ((ERRLOGMASK & type) || debug==1 ) \
-            printk(KERN_INFO "cdrom: " fmt, ## args)
+#define cdinfo(type, fmt, args...)			\
+do {							\
+	if ((ERRLOGMASK & type) || debug == 1)		\
+		pr_info(fmt, ##args);			\
+} while (0)
 #else
-#define cdinfo(type, fmt, args...) 
+#define cdinfo(type, fmt, args...)			\
+do {							\
+	if (0 && (ERRLOGMASK & type) || debug == 1)	\
+		pr_info(fmt, ##args);			\
+} while (0)
 #endif
 
 /* These are used to simplify getting data in from and back to user land */
@@ -395,7 +403,7 @@ int register_cdrom(struct cdrom_device_info *cdi)
 	if (cdo->open == NULL || cdo->release == NULL)
 		return -EINVAL;
 	if (!banner_printed) {
-		printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
+		pr_info("Uniform CD-ROM driver " REVISION "\n");
 		banner_printed = 1;
 		cdrom_sysctl_register();
 	}
@@ -546,7 +554,7 @@ static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
 	unsigned char buffer[12];
 	int ret;
 
-	printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
+	pr_info("%sstarting format\n", cont ? "Re" : "");
 
 	/*
 	 * FmtData bit set (bit 4), format type is 1
@@ -576,7 +584,7 @@ static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
 
 	ret = cdi->ops->generic_packet(cdi, &cgc);
 	if (ret)
-		printk(KERN_INFO "cdrom: bgformat failed\n");
+		pr_info("bgformat failed\n");
 
 	return ret;
 }
@@ -622,8 +630,7 @@ static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
 
 	ret = 0;
 	if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
-		printk(KERN_INFO "cdrom: issuing MRW back ground "
-				"format suspend\n");
+		pr_info("issuing MRW background format suspend\n");
 		ret = cdrom_mrw_bgformat_susp(cdi, 0);
 	}
 
@@ -658,7 +665,8 @@ static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
 	if ((ret = cdrom_mode_select(cdi, &cgc)))
 		return ret;
 
-	printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
+	pr_info("%s: mrw address space %s selected\n",
+		cdi->name, mrw_address_space[space]);
 	return 0;
 }
 
@@ -762,7 +770,7 @@ static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
 	 * always reset to DMA lba space on open
 	 */
 	if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
-		printk(KERN_ERR "cdrom: failed setting lba address space\n");
+		pr_err("failed setting lba address space\n");
 		return 1;
 	}
 
@@ -781,8 +789,7 @@ static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
 	 * 3	-	MRW formatting complete
 	 */
 	ret = 0;
-	printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
-			mrw_format_status[di.mrw_status]);
+	pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
 	if (!di.mrw_status)
 		ret = 1;
 	else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
@@ -932,8 +939,7 @@ static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
 		return;
 	}
 
-	printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
-	       cdi->name);
+	pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
 
 	init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
 	cgc.cmd[0] = GPCMD_FLUSH_CACHE;
@@ -2176,7 +2182,7 @@ retry:
 	 * frame dma, so drop to single frame dma if we need to
 	 */
 	if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
-		printk("cdrom: dropping to single frame dma\n");
+		pr_info("dropping to single frame dma\n");
 		cdi->cdda_method = CDDA_BPC_SINGLE;
 		goto retry;
 	}
@@ -2189,7 +2195,7 @@ retry:
 	if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
 		return ret;
 
-	printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
+	pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
 	cdi->cdda_method = CDDA_OLD;
 	return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);	
 }
@@ -3401,7 +3407,7 @@ static int cdrom_print_info(const char *header, int val, char *info,
 					"\t%d", CDROM_CAN(val) != 0);
 			break;
 		default:
-			printk(KERN_INFO "cdrom: invalid option%d\n", option);
+			pr_info("invalid option%d\n", option);
 			return 1;
 		}
 		if (!ret)
@@ -3491,7 +3497,7 @@ doit:
 	mutex_unlock(&cdrom_mutex);
 	return proc_dostring(ctl, write, buffer, lenp, ppos);
 done:
-	printk(KERN_INFO "cdrom: info buffer too small\n");
+	pr_info("info buffer too small\n");
 	goto doit;
 }
 
@@ -3665,7 +3671,7 @@ static int __init cdrom_init(void)
 
 static void __exit cdrom_exit(void)
 {
-	printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
+	pr_info("Uniform CD-ROM driver unloaded\n");
 	cdrom_sysctl_unregister();
 }
 
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 7c05ddc63ae8..5219b57deb36 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -19,6 +19,8 @@
  *
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/fs.h>
@@ -339,8 +341,7 @@ static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
 		tocuse = 0;
 		err = gdrom_readtoc_cmd(gd.toc, 0);
 		if (err) {
-			printk(KERN_INFO "GDROM: Could not get CD "
-				"table of contents\n");
+			pr_info("Could not get CD table of contents\n");
 			return -ENXIO;
 		}
 	}
@@ -357,8 +358,7 @@ static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
 	} while (track >= fentry);
 
 	if ((track > 100) || (track < get_entry_track(gd.toc->first))) {
-		printk(KERN_INFO "GDROM: No data on the last "
-			"session of the CD\n");
+		pr_info("No data on the last session of the CD\n");
 		gdrom_getsense(NULL);
 		return -ENXIO;
 	}
@@ -451,14 +451,14 @@ static int gdrom_getsense(short *bufstring)
 		goto cleanup_sense;
 	insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
 	if (sense[1] & 40) {
-		printk(KERN_INFO "GDROM: Drive not ready - command aborted\n");
+		pr_info("Drive not ready - command aborted\n");
 		goto cleanup_sense;
 	}
 	sense_key = sense[1] & 0x0F;
 	if (sense_key < ARRAY_SIZE(sense_texts))
-		printk(KERN_INFO "GDROM: %s\n", sense_texts[sense_key].text);
+		pr_info("%s\n", sense_texts[sense_key].text);
 	else
-		printk(KERN_ERR "GDROM: Unknown sense key: %d\n", sense_key);
+		pr_err("Unknown sense key: %d\n", sense_key);
 	if (bufstring) /* return addional sense data */
 		memcpy(bufstring, &sense[4], 2);
 	if (sense_key < 2)
@@ -644,13 +644,12 @@ static void gdrom_request(struct request_queue *rq)
 
 	while ((req = blk_fetch_request(rq)) != NULL) {
 		if (req->cmd_type != REQ_TYPE_FS) {
-			printk(KERN_DEBUG "GDROM: Non-fs request ignored\n");
+			printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
 			__blk_end_request_all(req, -EIO);
 			continue;
 		}
 		if (rq_data_dir(req) != READ) {
-			printk(KERN_NOTICE "GDROM: Read only device -");
-			printk(" write request ignored\n");
+			pr_notice("Read only device - write request ignored\n");
 			__blk_end_request_all(req, -EIO);
 			continue;
 		}
@@ -685,7 +684,7 @@ static int __devinit gdrom_outputversion(void)
 	firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);
 	if (!firmw_ver)
 		goto free_manuf_name;
-	printk(KERN_INFO "GDROM: %s from %s with firmware %s\n",
+	pr_info("%s from %s with firmware %s\n",
 		model_name, manuf_name, firmw_ver);
 	err = 0;
 	kfree(firmw_ver);
@@ -757,7 +756,7 @@ static int __devinit probe_gdrom(struct platform_device *devptr)
 	int err;
 	/* Start the device */
 	if (gdrom_execute_diagnostic() != 1) {
-		printk(KERN_WARNING "GDROM: ATA Probe for GDROM failed.\n");
+		pr_warning("ATA Probe for GDROM failed\n");
 		return -ENODEV;
 	}
 	/* Print out firmware ID */
@@ -767,7 +766,7 @@ static int __devinit probe_gdrom(struct platform_device *devptr)
 	gdrom_major = register_blkdev(0, GDROM_DEV_NAME);
 	if (gdrom_major <= 0)
 		return gdrom_major;
-	printk(KERN_INFO "GDROM: Registered with major number %d\n",
+	pr_info("Registered with major number %d\n",
 		gdrom_major);
 	/* Specify basic properties of drive */
 	gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL);
@@ -818,7 +817,7 @@ probe_fail_no_disk:
 	unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
 	gdrom_major = 0;
 probe_fail_no_mem:
-	printk(KERN_WARNING "GDROM: Probe failed - error is 0x%X\n", err);
+	pr_warning("Probe failed - error is 0x%X\n", err);
 	return err;
 }
 
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 14e420168764..1fa6628d150b 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -31,6 +31,8 @@
  * the OS/400 partition.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/major.h>
 #include <linux/blkdev.h>
 #include <linux/cdrom.h>
@@ -53,9 +55,6 @@
 
 #define VIOCD_VERS "1.06"
 
-#define VIOCD_KERN_WARNING		KERN_WARNING "viocd: "
-#define VIOCD_KERN_INFO			KERN_INFO "viocd: "
-
 /*
  * Should probably make this a module parameter....sigh
  */
@@ -202,9 +201,8 @@ static int viocd_open(struct cdrom_device_info *cdi, int purpose)
 			(u64)&we, VIOVERSION << 16, ((u64)device_no << 48),
 			0, 0, 0);
 	if (hvrc != 0) {
-		printk(VIOCD_KERN_WARNING
-				"bad rc on HvCallEvent_signalLpEventFast %d\n",
-				(int)hvrc);
+		pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+			   (int)hvrc);
 		return -EIO;
 	}
 
@@ -213,8 +211,8 @@ static int viocd_open(struct cdrom_device_info *cdi, int purpose)
 	if (we.rc) {
 		const struct vio_error_entry *err =
 			vio_lookup_rc(viocd_err_table, we.sub_result);
-		printk(VIOCD_KERN_WARNING "bad rc %d:0x%04X on open: %s\n",
-				we.rc, we.sub_result, err->msg);
+		pr_warning("bad rc %d:0x%04X on open: %s\n",
+			   we.rc, we.sub_result, err->msg);
 		return -err->errno;
 	}
 
@@ -234,9 +232,8 @@ static void viocd_release(struct cdrom_device_info *cdi)
 			viopath_targetinst(viopath_hostLp), 0,
 			VIOVERSION << 16, ((u64)device_no << 48), 0, 0, 0);
 	if (hvrc != 0)
-		printk(VIOCD_KERN_WARNING
-				"bad rc on HvCallEvent_signalLpEventFast %d\n",
-				(int)hvrc);
+		pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+			   (int)hvrc);
 }
 
 /* Send a read or write request to OS/400 */
@@ -262,13 +259,12 @@ static int send_request(struct request *req)
 
 	sg_init_table(&sg, 1);
         if (blk_rq_map_sg(req->q, req, &sg) == 0) {
-		printk(VIOCD_KERN_WARNING
-				"error setting up scatter/gather list\n");
+		pr_warning("error setting up scatter/gather list\n");
 		return -1;
 	}
 
 	if (dma_map_sg(diskinfo->dev, &sg, 1, direction) == 0) {
-		printk(VIOCD_KERN_WARNING "error allocating sg tce\n");
+		pr_warning("error allocating sg tce\n");
 		return -1;
 	}
 	dmaaddr = sg_dma_address(&sg);
@@ -284,7 +280,7 @@ static int send_request(struct request *req)
 			((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr,
 			(u64)blk_rq_pos(req) * 512, len, 0);
 	if (hvrc != HvLpEvent_Rc_Good) {
-		printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc);
+		pr_warning("hv error on op %d\n", (int)hvrc);
 		return -1;
 	}
 
@@ -301,8 +297,7 @@ static void do_viocd_request(struct request_queue *q)
 		if (req->cmd_type != REQ_TYPE_FS)
 			__blk_end_request_all(req, -EIO);
 		else if (send_request(req) < 0) {
-			printk(VIOCD_KERN_WARNING
-					"unable to send message to OS/400!");
+			pr_warning("unable to send message to OS/400!\n");
 			__blk_end_request_all(req, -EIO);
 		} else
 			rwreq++;
@@ -327,8 +322,8 @@ static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr)
 			(u64)&we, VIOVERSION << 16, ((u64)device_no << 48),
 			0, 0, 0);
 	if (hvrc != 0) {
-		printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n",
-				(int)hvrc);
+		pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+			   (int)hvrc);
 		return -EIO;
 	}
 
@@ -338,9 +333,8 @@ static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr)
 	if (we.rc) {
 		const struct vio_error_entry *err =
 			vio_lookup_rc(viocd_err_table, we.sub_result);
-		printk(VIOCD_KERN_WARNING
-				"bad rc %d:0x%04X on check_change: %s; Assuming no change\n",
-				we.rc, we.sub_result, err->msg);
+		pr_warning("bad rc %d:0x%04X on check_change: %s; Assuming no change\n",
+			   we.rc, we.sub_result, err->msg);
 		return 0;
 	}
 
@@ -367,8 +361,8 @@ static int viocd_lock_door(struct cdrom_device_info *cdi, int locking)
 			(u64)&we, VIOVERSION << 16,
 			(device_no << 48) | (flags << 32), 0, 0, 0);
 	if (hvrc != 0) {
-		printk(VIOCD_KERN_WARNING "bad rc on HvCallEvent_signalLpEventFast %d\n",
-				(int)hvrc);
+		pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
+			   (int)hvrc);
 		return -EIO;
 	}
 
@@ -455,8 +449,7 @@ static void vio_handle_cd_event(struct HvLpEvent *event)
 		return;
 	/* First, we should NEVER get an int here...only acks */
 	if (hvlpevent_is_int(event)) {
-		printk(VIOCD_KERN_WARNING
-				"Yikes! got an int in viocd event handler!\n");
+		pr_warning("Yikes! got an int in viocd event handler!\n");
 		if (hvlpevent_need_ack(event)) {
 			event->xRc = HvLpEvent_Rc_InvalidSubtype;
 			HvCallEvent_ackLpEvent(event);
@@ -510,10 +503,9 @@ return_complete:
 			const struct vio_error_entry *err =
 				vio_lookup_rc(viocd_err_table,
 						bevent->sub_result);
-			printk(VIOCD_KERN_WARNING "request %p failed "
-					"with rc %d:0x%04X: %s\n",
-					req, event->xRc,
-					bevent->sub_result, err->msg);
+			pr_warning("request %p failed with rc %d:0x%04X: %s\n",
+				   req, event->xRc,
+				   bevent->sub_result, err->msg);
 			__blk_end_request_all(req, -EIO);
 		} else
 			__blk_end_request_all(req, 0);
@@ -524,9 +516,8 @@ return_complete:
 		break;
 
 	default:
-		printk(VIOCD_KERN_WARNING
-				"message with invalid subtype %0x04X!\n",
-				event->xSubtype & VIOMINOR_SUBTYPE_MASK);
+		pr_warning("message with invalid subtype %0x04X!\n",
+			   event->xSubtype & VIOMINOR_SUBTYPE_MASK);
 		if (hvlpevent_need_ack(event)) {
 			event->xRc = HvLpEvent_Rc_InvalidSubtype;
 			HvCallEvent_ackLpEvent(event);
@@ -593,23 +584,19 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	sprintf(c->name, VIOCD_DEVICE "%c", 'a' + deviceno);
 
 	if (register_cdrom(c) != 0) {
-		printk(VIOCD_KERN_WARNING "Cannot register viocd CD-ROM %s!\n",
-				c->name);
+		pr_warning("Cannot register viocd CD-ROM %s!\n", c->name);
 		goto out;
 	}
-	printk(VIOCD_KERN_INFO "cd %s is iSeries resource %10.10s "
-			"type %4.4s, model %3.3s\n",
-			c->name, d->rsrcname, d->type, d->model);
+	pr_info("cd %s is iSeries resource %10.10s type %4.4s, model %3.3s\n",
+		c->name, d->rsrcname, d->type, d->model);
 	q = blk_init_queue(do_viocd_request, &viocd_reqlock);
 	if (q == NULL) {
-		printk(VIOCD_KERN_WARNING "Cannot allocate queue for %s!\n",
-				c->name);
+		pr_warning("Cannot allocate queue for %s!\n", c->name);
 		goto out_unregister_cdrom;
 	}
 	gendisk = alloc_disk(1);
 	if (gendisk == NULL) {
-		printk(VIOCD_KERN_WARNING "Cannot create gendisk for %s!\n",
-				c->name);
+		pr_warning("Cannot create gendisk for %s!\n", c->name);
 		goto out_cleanup_queue;
 	}
 	gendisk->major = VIOCD_MAJOR;
@@ -682,21 +669,19 @@ static int __init viocd_init(void)
 			return -ENODEV;
 	}
 
-	printk(VIOCD_KERN_INFO "vers " VIOCD_VERS ", hosting partition %d\n",
-			viopath_hostLp);
+	pr_info("vers " VIOCD_VERS ", hosting partition %d\n", viopath_hostLp);
 
 	if (register_blkdev(VIOCD_MAJOR, VIOCD_DEVICE) != 0) {
-		printk(VIOCD_KERN_WARNING "Unable to get major %d for %s\n",
-				VIOCD_MAJOR, VIOCD_DEVICE);
+		pr_warning("Unable to get major %d for %s\n",
+			   VIOCD_MAJOR, VIOCD_DEVICE);
 		return -EIO;
 	}
 
 	ret = viopath_open(viopath_hostLp, viomajorsubtype_cdio,
 			MAX_CD_REQ + 2);
 	if (ret) {
-		printk(VIOCD_KERN_WARNING
-				"error opening path to host partition %d\n",
-				viopath_hostLp);
+		pr_warning("error opening path to host partition %d\n",
+			   viopath_hostLp);
 		goto out_unregister;
 	}
 
-- 
cgit v1.2.3


From 28018c242a4ec7017bbbf81d2d3952f820a27118 Mon Sep 17 00:00:00 2001
From: James Bottomley <James.Bottomley@suse.de>
Date: Thu, 1 Jul 2010 19:49:17 +0900
Subject: block: implement an unprep function corresponding directly to prep

Reviewed-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/scsi_lib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 5f1160841b0e..ee836193f531 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -85,7 +85,7 @@ static void scsi_unprep_request(struct request *req)
 {
 	struct scsi_cmnd *cmd = req->special;
 
-	req->cmd_flags &= ~REQ_DONTPREP;
+	blk_unprep_request(req);
 	req->special = NULL;
 
 	scsi_put_command(cmd);
-- 
cgit v1.2.3


From f1126e950d28ff875d96ed6a04a9ff96c7bfc357 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Thu, 1 Jul 2010 19:49:18 +0900
Subject: scsi: add sd_unprep_fn to free discard page

This fixes discard page leak by using q->unprep_rq_fn facility.

q->unprep_rq_fn is called when all the data buffer (req->bio and
scsi_data_buffer) in the request is freed.

sd_unprep() uses rq->buffer to free discard page allocated in
sd_prepare_discard().

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 86da819c70eb..2d4e3a865f39 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -425,6 +425,7 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 	sector_t sector = bio->bi_sector;
 	unsigned int nr_sectors = bio_sectors(bio);
 	unsigned int len;
+	int ret;
 	struct page *page;
 
 	if (sdkp->device->sector_size == 4096) {
@@ -465,7 +466,15 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 	}
 
 	blk_add_request_payload(rq, page, len);
-	return scsi_setup_blk_pc_cmnd(sdp, rq);
+	ret = scsi_setup_blk_pc_cmnd(sdp, rq);
+	rq->buffer = page_address(page);
+	return ret;
+}
+
+static void sd_unprep_fn(struct request_queue *q, struct request *rq)
+{
+	if (rq->cmd_flags & REQ_DISCARD)
+		__free_page(virt_to_page(rq->buffer));
 }
 
 /**
@@ -2242,6 +2251,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie)
 	sd_revalidate_disk(gd);
 
 	blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
+	blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn);
 
 	gd->driverfs_dev = &sdp->sdev_gendev;
 	gd->flags = GENHD_FL_EXT_DEVT;
-- 
cgit v1.2.3


From 802447c1c0513a0ea0e29d6bda23b19ac0686654 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Thu, 1 Jul 2010 19:49:19 +0900
Subject: scsi: remove unused free discard page in sd_done

- sd_done isn't called for pc request so we never call the code.
- we use sd_unprep to free discard page now.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 9 ---------
 1 file changed, 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 2d4e3a865f39..aa6b48ba78b1 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1179,15 +1179,6 @@ static int sd_done(struct scsi_cmnd *SCpnt)
 	int sense_valid = 0;
 	int sense_deferred = 0;
 
-	/*
-	 * If this is a discard request that originated from the kernel
-	 * we need to free our payload here.  Note that we need to check
-	 * the request flag as the normal payload rules apply for
-	 * pass-through UNMAP / WRITE SAME requests.
-	 */
-	if (SCpnt->request->cmd_flags & REQ_DISCARD)
-		__free_page(bio_page(SCpnt->request->bio));
-
 	if (result) {
 		sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
 		if (sense_valid)
-- 
cgit v1.2.3


From 90467c294aba7f911bdae72ed86995cf1de4d364 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:34 +0900
Subject: scsi: stop using q->prepare_flush_fn

scsi-ml builds flush requests via q->prepare_flush_fn(), however,
builds discard requests via q->prep_rq_fn.

Using two different mechnisms for the similar requests (building
commands in SCSI ULD) doesn't make sense.

Handing both via q->prep_rq_fn makes the code design simpler.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index aa6b48ba78b1..e8c295e01466 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -471,6 +471,18 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 	return ret;
 }
 
+static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq)
+{
+	/* for now, we use REQ_TYPE_BLOCK_PC. */
+	rq->cmd_type = REQ_TYPE_BLOCK_PC;
+	rq->timeout = SD_TIMEOUT;
+	rq->retries = SD_MAX_RETRIES;
+	rq->cmd[0] = SYNCHRONIZE_CACHE;
+	rq->cmd_len = 10;
+
+	return scsi_setup_blk_pc_cmnd(sdp, rq);
+}
+
 static void sd_unprep_fn(struct request_queue *q, struct request *rq)
 {
 	if (rq->cmd_flags & REQ_DISCARD)
@@ -504,6 +516,9 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
 	if (rq->cmd_flags & REQ_DISCARD) {
 		ret = scsi_setup_discard_cmnd(sdp, rq);
 		goto out;
+	} else if (rq->cmd_flags & REQ_FLUSH) {
+		ret = scsi_setup_flush_cmnd(sdp, rq);
+		goto out;
 	} else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		ret = scsi_setup_blk_pc_cmnd(sdp, rq);
 		goto out;
@@ -1053,15 +1068,6 @@ static int sd_sync_cache(struct scsi_disk *sdkp)
 	return 0;
 }
 
-static void sd_prepare_flush(struct request_queue *q, struct request *rq)
-{
-	rq->cmd_type = REQ_TYPE_BLOCK_PC;
-	rq->timeout = SD_TIMEOUT;
-	rq->retries = SD_MAX_RETRIES;
-	rq->cmd[0] = SYNCHRONIZE_CACHE;
-	rq->cmd_len = 10;
-}
-
 static void sd_rescan(struct device *dev)
 {
 	struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
@@ -2129,7 +2135,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
 	else
 		ordered = QUEUE_ORDERED_DRAIN;
 
-	blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush);
+	blk_queue_ordered(sdkp->disk->queue, ordered, NULL);
 
 	set_capacity(disk, sdkp->capacity);
 	kfree(buffer);
-- 
cgit v1.2.3


From 7f9815f09dc201f2205981c11fadcf82a9e3cc42 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:35 +0900
Subject: osdblk: stop using q->prepare_flush_fn

use REQ_FLUSH flag instead.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/osdblk.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index 819002ba3433..9639565a9a6a 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -323,7 +323,7 @@ static void osdblk_rq_fn(struct request_queue *q)
 		 * driver-specific, etc.
 		 */
 
-		do_flush = (rq->special == (void *) 0xdeadbeefUL);
+		do_flush = rq->cmd_flags & REQ_FLUSH;
 		do_write = (rq_data_dir(rq) == WRITE);
 
 		if (!do_flush) { /* osd_flush does not use a bio */
@@ -380,14 +380,6 @@ static void osdblk_rq_fn(struct request_queue *q)
 	}
 }
 
-static void osdblk_prepare_flush(struct request_queue *q, struct request *rq)
-{
-	/* add driver-specific marker, to indicate that this request
-	 * is a flush command
-	 */
-	rq->special = (void *) 0xdeadbeefUL;
-}
-
 static void osdblk_free_disk(struct osdblk_device *osdev)
 {
 	struct gendisk *disk = osdev->disk;
@@ -447,7 +439,7 @@ static int osdblk_init_disk(struct osdblk_device *osdev)
 	blk_queue_stack_limits(q, osd_request_queue(osdev->osd));
 
 	blk_queue_prep_rq(q, blk_queue_start_tag);
-	blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH, osdblk_prepare_flush);
+	blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
 
 	disk->queue = q;
 
-- 
cgit v1.2.3


From 98d8c8f40ed72d997e50bc107a5cc1a6cee19e76 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:36 +0900
Subject: ps3disk: stop using q->prepare_flush_fn

REQ_FLUSH flag enables us to kill ps3disk_prepare_flush().

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/ps3disk.c | 25 ++++++-------------------
 1 file changed, 6 insertions(+), 19 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index 5f208c0bf156..ab528a480f98 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -196,13 +196,12 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
 	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
 
 	while ((req = blk_fetch_request(q))) {
-		if (req->cmd_type == REQ_TYPE_FS) {
-			if (ps3disk_submit_request_sg(dev, req))
-				break;
-		} else if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
-			   req->cmd[0] == REQ_LB_OP_FLUSH) {
+		if (req->cmd_flags & REQ_FLUSH) {
 			if (ps3disk_submit_flush_request(dev, req))
 				break;
+		} else if (req->cmd_type == REQ_TYPE_FS) {
+			if (ps3disk_submit_request_sg(dev, req))
+				break;
 		} else {
 			blk_dump_rq_flags(req, DEVICE_NAME " bad request");
 			__blk_end_request_all(req, -EIO);
@@ -257,8 +256,7 @@ static irqreturn_t ps3disk_interrupt(int irq, void *data)
 		return IRQ_HANDLED;
 	}
 
-	if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
-	    req->cmd[0] == REQ_LB_OP_FLUSH) {
+	if (req->cmd_flags & REQ_FLUSH) {
 		read = 0;
 		op = "flush";
 	} else {
@@ -398,16 +396,6 @@ static int ps3disk_identify(struct ps3_storage_device *dev)
 	return 0;
 }
 
-static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
-{
-	struct ps3_storage_device *dev = q->queuedata;
-
-	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
-
-	req->cmd_type = REQ_TYPE_LINUX_BLOCK;
-	req->cmd[0] = REQ_LB_OP_FLUSH;
-}
-
 static unsigned long ps3disk_mask;
 
 static DEFINE_MUTEX(ps3disk_mask_mutex);
@@ -480,8 +468,7 @@ static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
 	blk_queue_dma_alignment(queue, dev->blk_size-1);
 	blk_queue_logical_block_size(queue, dev->blk_size);
 
-	blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
-			  ps3disk_prepare_flush);
+	blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
 
 	blk_queue_max_segments(queue, -1);
 	blk_queue_max_segment_size(queue, dev->bounce_size);
-- 
cgit v1.2.3


From 144d6ed551ce430084489b198826c89bac5680dc Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:37 +0900
Subject: dm: stop using q->prepare_flush_fn

use REQ_FLUSH flag instead.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Alasdair G Kergon <agk@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/md/dm.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index d6f77baeafd6..00c810551814 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1455,20 +1455,9 @@ static int dm_request(struct request_queue *q, struct bio *bio)
 	return _dm_request(q, bio);
 }
 
-/*
- * Mark this request as flush request, so that dm_request_fn() can
- * recognize.
- */
-static void dm_rq_prepare_flush(struct request_queue *q, struct request *rq)
-{
-	rq->cmd_type = REQ_TYPE_LINUX_BLOCK;
-	rq->cmd[0] = REQ_LB_OP_FLUSH;
-}
-
 static bool dm_rq_is_flush_request(struct request *rq)
 {
-	if (rq->cmd_type == REQ_TYPE_LINUX_BLOCK &&
-	    rq->cmd[0] == REQ_LB_OP_FLUSH)
+	if (rq->cmd_flags & REQ_FLUSH)
 		return true;
 	else
 		return false;
@@ -1912,8 +1901,7 @@ static struct mapped_device *alloc_dev(int minor)
 	blk_queue_softirq_done(md->queue, dm_softirq_done);
 	blk_queue_prep_rq(md->queue, dm_prep_fn);
 	blk_queue_lld_busy(md->queue, dm_lld_busy);
-	blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN_FLUSH,
-			  dm_rq_prepare_flush);
+	blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
 
 	md->disk = alloc_disk(1);
 	if (!md->disk)
-- 
cgit v1.2.3


From dd40e456a40ebb87330b7fc694359ce52f1996aa Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:38 +0900
Subject: virtio_blk: stop using q->prepare_flush_fn

use REQ_FLUSH flag instead.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/virtio_blk.c | 50 +++++++++++++++++++---------------------------
 1 file changed, 21 insertions(+), 29 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index b5ebcd33bdb6..b277f9e6abac 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -99,33 +99,32 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 		return false;
 
 	vbr->req = req;
-	switch (req->cmd_type) {
-	case REQ_TYPE_FS:
-		vbr->out_hdr.type = 0;
-		vbr->out_hdr.sector = blk_rq_pos(vbr->req);
-		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
-		break;
-	case REQ_TYPE_BLOCK_PC:
-		vbr->out_hdr.type = VIRTIO_BLK_T_SCSI_CMD;
-		vbr->out_hdr.sector = 0;
-		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
-		break;
-	case REQ_TYPE_SPECIAL:
-		vbr->out_hdr.type = VIRTIO_BLK_T_GET_ID;
+
+	if (req->cmd_flags & REQ_FLUSH) {
+		vbr->out_hdr.type = VIRTIO_BLK_T_FLUSH;
 		vbr->out_hdr.sector = 0;
 		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
-		break;
-	case REQ_TYPE_LINUX_BLOCK:
-		if (req->cmd[0] == REQ_LB_OP_FLUSH) {
-			vbr->out_hdr.type = VIRTIO_BLK_T_FLUSH;
+	} else {
+		switch (req->cmd_type) {
+		case REQ_TYPE_FS:
+			vbr->out_hdr.type = 0;
+			vbr->out_hdr.sector = blk_rq_pos(vbr->req);
+			vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
+			break;
+		case REQ_TYPE_BLOCK_PC:
+			vbr->out_hdr.type = VIRTIO_BLK_T_SCSI_CMD;
 			vbr->out_hdr.sector = 0;
 			vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
 			break;
+		case REQ_TYPE_SPECIAL:
+			vbr->out_hdr.type = VIRTIO_BLK_T_GET_ID;
+			vbr->out_hdr.sector = 0;
+			vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
+			break;
+		default:
+			/* We don't put anything else in the queue. */
+			BUG();
 		}
-		/*FALLTHRU*/
-	default:
-		/* We don't put anything else in the queue. */
-		BUG();
 	}
 
 	if (vbr->req->cmd_flags & REQ_HARDBARRIER)
@@ -195,12 +194,6 @@ static void do_virtblk_request(struct request_queue *q)
 		virtqueue_kick(vblk->vq);
 }
 
-static void virtblk_prepare_flush(struct request_queue *q, struct request *req)
-{
-	req->cmd_type = REQ_TYPE_LINUX_BLOCK;
-	req->cmd[0] = REQ_LB_OP_FLUSH;
-}
-
 /* return id (s/n) string for *disk to *id_str
  */
 static int virtblk_get_id(struct gendisk *disk, char *id_str)
@@ -373,8 +366,7 @@ static int __devinit virtblk_probe(struct virtio_device *vdev)
 
 	/* If barriers are supported, tell block layer that queue is ordered */
 	if (virtio_has_feature(vdev, VIRTIO_BLK_F_FLUSH))
-		blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH,
-				  virtblk_prepare_flush);
+		blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
 	else if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER))
 		blk_queue_ordered(q, QUEUE_ORDERED_TAG, NULL);
 
-- 
cgit v1.2.3


From afc23068103ccfbf1917eb2a007bc15ab5418cc9 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:39 +0900
Subject: ide: stop using q->prepare_flush_fn

use REQ_FLUSH flag instead.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/ide/ide-disk.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index df3d91ba1c96..c22e6226e9e9 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -427,10 +427,15 @@ static void ide_disk_unlock_native_capacity(ide_drive_t *drive)
 		drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */
 }
 
-static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
+static int idedisk_prep_fn(struct request_queue *q, struct request *rq)
 {
 	ide_drive_t *drive = q->queuedata;
-	struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+	struct ide_cmd *cmd;
+
+	if (!(rq->cmd_flags & REQ_FLUSH))
+		return BLKPREP_OK;
+
+	cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
 
 	/* FIXME: map struct ide_taskfile on rq->cmd[] */
 	BUG_ON(cmd == NULL);
@@ -448,6 +453,8 @@ static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 	rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 	rq->special = cmd;
 	cmd->rq = rq;
+
+	return BLKPREP_OK;
 }
 
 ide_devset_get(multcount, mult_count);
@@ -513,7 +520,6 @@ static void update_ordered(ide_drive_t *drive)
 {
 	u16 *id = drive->id;
 	unsigned ordered = QUEUE_ORDERED_NONE;
-	prepare_flush_fn *prep_fn = NULL;
 
 	if (drive->dev_flags & IDE_DFLAG_WCACHE) {
 		unsigned long long capacity;
@@ -538,12 +544,12 @@ static void update_ordered(ide_drive_t *drive)
 
 		if (barrier) {
 			ordered = QUEUE_ORDERED_DRAIN_FLUSH;
-			prep_fn = idedisk_prepare_flush;
+			blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
 		}
 	} else
 		ordered = QUEUE_ORDERED_DRAIN;
 
-	blk_queue_ordered(drive->queue, ordered, prep_fn);
+	blk_queue_ordered(drive->queue, ordered, NULL);
 }
 
 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
-- 
cgit v1.2.3


From 00fff26539bfe3fad21c164fc4002d9ede056fb0 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 17:45:40 +0900
Subject: block: remove q->prepare_flush_fn completely

This removes q->prepare_flush_fn completely (changes the
blk_queue_ordered API).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/brd.c          | 2 +-
 drivers/block/loop.c         | 2 +-
 drivers/block/osdblk.c       | 2 +-
 drivers/block/ps3disk.c      | 2 +-
 drivers/block/virtio_blk.c   | 4 ++--
 drivers/block/xen-blkfront.c | 3 +--
 drivers/ide/ide-disk.c       | 2 +-
 drivers/md/dm.c              | 2 +-
 drivers/mmc/card/queue.c     | 2 +-
 drivers/s390/block/dasd.c    | 2 +-
 drivers/scsi/sd.c            | 2 +-
 11 files changed, 12 insertions(+), 13 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 1b218c6b6820..1d2c18620f9a 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -479,7 +479,7 @@ static struct brd_device *brd_alloc(int i)
 	if (!brd->brd_queue)
 		goto out_free_dev;
 	blk_queue_make_request(brd->brd_queue, brd_make_request);
-	blk_queue_ordered(brd->brd_queue, QUEUE_ORDERED_TAG, NULL);
+	blk_queue_ordered(brd->brd_queue, QUEUE_ORDERED_TAG);
 	blk_queue_max_hw_sectors(brd->brd_queue, 1024);
 	blk_queue_bounce_limit(brd->brd_queue, BLK_BOUNCE_ANY);
 
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index fedfdb7d3cdf..d285a5481965 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -831,7 +831,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
 	lo->lo_queue->unplug_fn = loop_unplug;
 
 	if (!(lo_flags & LO_FLAGS_READ_ONLY) && file->f_op->fsync)
-		blk_queue_ordered(lo->lo_queue, QUEUE_ORDERED_DRAIN, NULL);
+		blk_queue_ordered(lo->lo_queue, QUEUE_ORDERED_DRAIN);
 
 	set_capacity(lo->lo_disk, size);
 	bd_set_size(bdev, size << 9);
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index 9639565a9a6a..2284b4f05c62 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -439,7 +439,7 @@ static int osdblk_init_disk(struct osdblk_device *osdev)
 	blk_queue_stack_limits(q, osd_request_queue(osdev->osd));
 
 	blk_queue_prep_rq(q, blk_queue_start_tag);
-	blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
+	blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH);
 
 	disk->queue = q;
 
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index ab528a480f98..e9da874d0419 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -468,7 +468,7 @@ static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
 	blk_queue_dma_alignment(queue, dev->blk_size-1);
 	blk_queue_logical_block_size(queue, dev->blk_size);
 
-	blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
+	blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH);
 
 	blk_queue_max_segments(queue, -1);
 	blk_queue_max_segment_size(queue, dev->bounce_size);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index b277f9e6abac..0a3222fd4442 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -366,9 +366,9 @@ static int __devinit virtblk_probe(struct virtio_device *vdev)
 
 	/* If barriers are supported, tell block layer that queue is ordered */
 	if (virtio_has_feature(vdev, VIRTIO_BLK_F_FLUSH))
-		blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
+		blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH);
 	else if (virtio_has_feature(vdev, VIRTIO_BLK_F_BARRIER))
-		blk_queue_ordered(q, QUEUE_ORDERED_TAG, NULL);
+		blk_queue_ordered(q, QUEUE_ORDERED_TAG);
 
 	/* If disk is read-only in the host, the guest should obey */
 	if (virtio_has_feature(vdev, VIRTIO_BLK_F_RO))
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 495533e66542..76af65b654e3 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -373,8 +373,7 @@ static int xlvbd_barrier(struct blkfront_info *info)
 	int err;
 
 	err = blk_queue_ordered(info->rq,
-				info->feature_barrier ? QUEUE_ORDERED_DRAIN : QUEUE_ORDERED_NONE,
-				NULL);
+				info->feature_barrier ? QUEUE_ORDERED_DRAIN : QUEUE_ORDERED_NONE);
 
 	if (err)
 		return err;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index c22e6226e9e9..7433e07de30e 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -549,7 +549,7 @@ static void update_ordered(ide_drive_t *drive)
 	} else
 		ordered = QUEUE_ORDERED_DRAIN;
 
-	blk_queue_ordered(drive->queue, ordered, NULL);
+	blk_queue_ordered(drive->queue, ordered);
 }
 
 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 00c810551814..d505a96845c1 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1901,7 +1901,7 @@ static struct mapped_device *alloc_dev(int minor)
 	blk_queue_softirq_done(md->queue, dm_softirq_done);
 	blk_queue_prep_rq(md->queue, dm_prep_fn);
 	blk_queue_lld_busy(md->queue, dm_lld_busy);
-	blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN_FLUSH, NULL);
+	blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN_FLUSH);
 
 	md->disk = alloc_disk(1);
 	if (!md->disk)
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index ec92bcbdeddb..c77eb49eda0e 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -128,7 +128,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 	mq->req = NULL;
 
 	blk_queue_prep_rq(mq->queue, mmc_prep_request);
-	blk_queue_ordered(mq->queue, QUEUE_ORDERED_DRAIN, NULL);
+	blk_queue_ordered(mq->queue, QUEUE_ORDERED_DRAIN);
 	queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mq->queue);
 
 #ifdef CONFIG_MMC_BLOCK_BOUNCE
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 33975e922d65..17b033d0e050 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2196,7 +2196,7 @@ static void dasd_setup_queue(struct dasd_block *block)
 	 */
 	blk_queue_max_segment_size(block->request_queue, PAGE_SIZE);
 	blk_queue_segment_boundary(block->request_queue, PAGE_SIZE - 1);
-	blk_queue_ordered(block->request_queue, QUEUE_ORDERED_DRAIN, NULL);
+	blk_queue_ordered(block->request_queue, QUEUE_ORDERED_DRAIN);
 }
 
 /*
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e8c295e01466..d9a4314a1948 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2135,7 +2135,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
 	else
 		ordered = QUEUE_ORDERED_DRAIN;
 
-	blk_queue_ordered(sdkp->disk->queue, ordered, NULL);
+	blk_queue_ordered(sdkp->disk->queue, ordered);
 
 	set_capacity(disk, sdkp->capacity);
 	kfree(buffer);
-- 
cgit v1.2.3


From 82b6d57fb11644fe25c8a1346627ad0027673dae Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sat, 3 Jul 2010 08:07:04 -0600
Subject: scsi: need to reset unprep_rq_fn in sd_remove

This is for block's for-2.6.36.

We need to reset q->unprep_rq_fn in sd_remove. Otherwise we hit kernel
oops if we access to a scsi disk device via sg after removing scsi
disk module.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index d9a4314a1948..0994ab63b598 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2384,6 +2384,7 @@ static int sd_remove(struct device *dev)
 	async_synchronize_full();
 	sdkp = dev_get_drvdata(dev);
 	blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn);
+	blk_queue_unprep_rq(sdkp->device->request_queue, NULL);
 	device_del(&sdkp->dev);
 	del_gendisk(sdkp->disk);
 	sd_shutdown(dev);
-- 
cgit v1.2.3


From 610a63498f7f366031a6327eaaa9963ffa110b2b Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Thu, 8 Jul 2010 10:16:17 +0200
Subject: scsi: fix discard page leak

We leak a page allocated for discard on some error conditions
(e.g. scsi_prep_state_check returns BLKPREP_DEFER in
scsi_setup_blk_pc_cmnd).

We unprep on requests that weren't prepped in the error path of
scsi_init_io. It makes the error path to clean up scsi commands messy.

Let's strictly apply the rule that we can't unprep on a request that
wasn't prepped.

Calling just scsi_put_command() in the error path of scsi_init_io() is
enough. We don't set REQ_DONTPREP yet.

scsi_setup_discard_cmnd can safely free a page on the error case with
the above rule.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/scsi_lib.c |  7 ++-----
 drivers/scsi/sd.c       | 10 ++++++++--
 2 files changed, 10 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index ee836193f531..b8de389636f8 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1011,11 +1011,8 @@ int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask)
 
 err_exit:
 	scsi_release_buffers(cmd);
-	if (error == BLKPREP_KILL)
-		scsi_put_command(cmd);
-	else /* BLKPREP_DEFER */
-		scsi_unprep_request(cmd->request);
-
+	scsi_put_command(cmd);
+	cmd->request->special = NULL;
 	return error;
 }
 EXPORT_SYMBOL(scsi_init_io);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 0994ab63b598..1d0c4b7c3b69 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -468,6 +468,10 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 	blk_add_request_payload(rq, page, len);
 	ret = scsi_setup_blk_pc_cmnd(sdp, rq);
 	rq->buffer = page_address(page);
+	if (ret != BLKPREP_OK) {
+		__free_page(page);
+		rq->buffer = NULL;
+	}
 	return ret;
 }
 
@@ -485,8 +489,10 @@ static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq)
 
 static void sd_unprep_fn(struct request_queue *q, struct request *rq)
 {
-	if (rq->cmd_flags & REQ_DISCARD)
-		__free_page(virt_to_page(rq->buffer));
+	if (rq->cmd_flags & REQ_DISCARD) {
+		free_page((unsigned long)rq->buffer);
+		rq->buffer = NULL;
+	}
 }
 
 /**
-- 
cgit v1.2.3


From 34484062445fe905bf02c72f87ddda21881acda3 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 7 Jul 2010 16:51:23 +0200
Subject: scsi/i2o_block: cleanup ioctl handling

This fixes the ioctl function of the i2o_block driver, which
has multiple problems:

* The BLKI2OSRSTRAT and BLKI2OSWSTRAT commands always return
  -ENOTTY on success, where they should return 0.
* Support for 32 bit compat is missing
* The driver should use the .ioctl function and because
  .locked_ioctl is going away.

The use of the big kernel lock remains for now, but gets
made explictit in the ioctl function.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/message/i2o/i2o_block.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index 108f0c2b2bfd..b8233ff863e3 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -53,6 +53,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2o.h>
+#include <linux/smp_lock.h>
 
 #include <linux/mempool.h>
 
@@ -652,30 +653,40 @@ static int i2o_block_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	struct gendisk *disk = bdev->bd_disk;
 	struct i2o_block_device *dev = disk->private_data;
+	int ret = -ENOTTY;
 
 	/* Anyone capable of this syscall can do *real bad* things */
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
+	lock_kernel();
 	switch (cmd) {
 	case BLKI2OGRSTRAT:
-		return put_user(dev->rcache, (int __user *)arg);
+		ret = put_user(dev->rcache, (int __user *)arg);
+		break;
 	case BLKI2OGWSTRAT:
-		return put_user(dev->wcache, (int __user *)arg);
+		ret = put_user(dev->wcache, (int __user *)arg);
+		break;
 	case BLKI2OSRSTRAT:
+		ret = -EINVAL;
 		if (arg < 0 || arg > CACHE_SMARTFETCH)
-			return -EINVAL;
+			break;
 		dev->rcache = arg;
+		ret = 0;
 		break;
 	case BLKI2OSWSTRAT:
+		ret = -EINVAL;
 		if (arg != 0
 		    && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK))
-			return -EINVAL;
+			break;
 		dev->wcache = arg;
+		ret = 0;
 		break;
 	}
-	return -ENOTTY;
+	unlock_kernel();
+
+	return ret;
 };
 
 /**
@@ -930,7 +941,8 @@ static const struct block_device_operations i2o_block_fops = {
 	.owner = THIS_MODULE,
 	.open = i2o_block_open,
 	.release = i2o_block_release,
-	.locked_ioctl = i2o_block_ioctl,
+	.ioctl = i2o_block_ioctl,
+	.compat_ioctl = i2o_block_ioctl,
 	.getgeo = i2o_block_getgeo,
 	.media_changed = i2o_block_media_changed
 };
-- 
cgit v1.2.3


From 8a6cfeb6deca3a8fefd639d898b0d163c0b5d368 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 8 Jul 2010 10:18:46 +0200
Subject: block: push down BKL into .locked_ioctl

As a preparation for the removal of the big kernel
lock in the block layer, this removes the BKL
from the common ioctl handling code, moving it
into every single driver still using it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/amiflop.c         | 17 +++++++++++++++--
 drivers/block/ataflop.c         | 18 +++++++++++++++---
 drivers/block/brd.c             |  5 ++++-
 drivers/block/cciss.c           |  8 +++++---
 drivers/block/cpqarray.c        | 18 ++++++++++++++++--
 drivers/block/floppy.c          | 17 +++++++++++++++--
 drivers/block/nbd.c             |  5 ++++-
 drivers/block/paride/pcd.c      | 11 +++++++++--
 drivers/block/paride/pd.c       |  5 ++++-
 drivers/block/paride/pf.c       |  6 +++++-
 drivers/block/pktcdvd.c         | 13 +++++++++----
 drivers/block/swim.c            |  5 ++++-
 drivers/block/swim3.c           | 17 +++++++++++++++--
 drivers/block/ub.c              | 10 ++++++++--
 drivers/block/virtio_blk.c      | 17 +++++++++++++++--
 drivers/block/xd.c              | 17 +++++++++++++++--
 drivers/block/xen-blkfront.c    |  2 +-
 drivers/cdrom/gdrom.c           | 11 +++++++++--
 drivers/cdrom/viocd.c           | 11 +++++++++--
 drivers/ide/ide-cd.c            | 18 ++++++++++++++++--
 drivers/ide/ide-disk_ioctl.c    |  9 +++++++--
 drivers/ide/ide-floppy_ioctl.c  | 12 +++++++++---
 drivers/ide/ide-gd.c            |  2 +-
 drivers/ide/ide-tape.c          | 10 ++++++++--
 drivers/message/i2o/i2o_block.c | 22 +++++-----------------
 drivers/mtd/mtd_blkdevs.c       |  5 ++++-
 drivers/scsi/sd.c               | 17 ++++++++++++-----
 drivers/scsi/sr.c               | 18 +++++++++++++-----
 28 files changed, 252 insertions(+), 74 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 832798aa14f6..0fa26359304c 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -60,6 +60,7 @@
 #include <linux/hdreg.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/amifdreg.h>
 #include <linux/amifd.h>
 #include <linux/buffer_head.h>
@@ -1423,7 +1424,7 @@ static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct amiga_floppy_struct *p = bdev->bd_disk->private_data;
@@ -1500,6 +1501,18 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode,
 	return 0;
 }
 
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = fd_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 static void fd_probe(int dev)
 {
 	unsigned long code;
@@ -1638,7 +1651,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner		= THIS_MODULE,
 	.open		= floppy_open,
 	.release	= floppy_release,
-	.locked_ioctl	= fd_ioctl,
+	.ioctl		= fd_ioctl,
 	.getgeo		= fd_getgeo,
 	.media_changed	= amiga_floppy_change,
 };
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index e35cf59cbfde..1bb8bfcfdbd9 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -67,6 +67,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 
 #include <asm/atafd.h>
 #include <asm/atafdreg.h>
@@ -359,7 +360,7 @@ static void finish_fdc( void );
 static void finish_fdc_done( int dummy );
 static void setup_req_params( int drive );
 static void redo_fd_request( void);
-static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
                      cmd, unsigned long param);
 static void fd_probe( int drive );
 static int fd_test_drive_present( int drive );
@@ -1480,7 +1481,7 @@ void do_fd_request(struct request_queue * q)
 	atari_enable_irq( IRQ_MFP_FDC );
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned int cmd, unsigned long param)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -1665,6 +1666,17 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode,
 	}
 }
 
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = fd_locked_ioctl(bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
 
 /* Initialize the 'unit' variable for drive 'drive' */
 
@@ -1855,7 +1867,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner		= THIS_MODULE,
 	.open		= floppy_open,
 	.release	= floppy_release,
-	.locked_ioctl	= fd_ioctl,
+	.ioctl		= fd_ioctl,
 	.media_changed	= check_floppy_change,
 	.revalidate_disk= floppy_revalidate,
 };
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 1d2c18620f9a..1c7f63792ff8 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -15,6 +15,7 @@
 #include <linux/blkdev.h>
 #include <linux/bio.h>
 #include <linux/highmem.h>
+#include <linux/smp_lock.h>
 #include <linux/radix-tree.h>
 #include <linux/buffer_head.h> /* invalidate_bh_lrus() */
 #include <linux/slab.h>
@@ -401,6 +402,7 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
 	 * ram device BLKFLSBUF has special semantics, we want to actually
 	 * release and destroy the ramdisk data.
 	 */
+	lock_kernel();
 	mutex_lock(&bdev->bd_mutex);
 	error = -EBUSY;
 	if (bdev->bd_openers <= 1) {
@@ -417,13 +419,14 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
 		error = 0;
 	}
 	mutex_unlock(&bdev->bd_mutex);
+	unlock_kernel();
 
 	return error;
 }
 
 static const struct block_device_operations brd_fops = {
 	.owner =		THIS_MODULE,
-	.locked_ioctl =		brd_ioctl,
+	.ioctl =		brd_ioctl,
 #ifdef CONFIG_BLK_DEV_XIP
 	.direct_access =	brd_direct_access,
 #endif
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 11b377762b8e..a6c0494dd054 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -179,6 +179,8 @@ static irqreturn_t do_cciss_intx(int irq, void *dev_id);
 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
 static int cciss_open(struct block_device *bdev, fmode_t mode);
 static int cciss_release(struct gendisk *disk, fmode_t mode);
+static int do_ioctl(struct block_device *bdev, fmode_t mode,
+		    unsigned int cmd, unsigned long arg);
 static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 		       unsigned int cmd, unsigned long arg);
 static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -237,7 +239,7 @@ static const struct block_device_operations cciss_fops = {
 	.owner = THIS_MODULE,
 	.open = cciss_open,
 	.release = cciss_release,
-	.locked_ioctl = cciss_ioctl,
+	.ioctl = do_ioctl,
 	.getgeo = cciss_getgeo,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = cciss_compat_ioctl,
@@ -1057,8 +1059,6 @@ static int cciss_release(struct gendisk *disk, fmode_t mode)
 	return 0;
 }
 
-#ifdef CONFIG_COMPAT
-
 static int do_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned cmd, unsigned long arg)
 {
@@ -1069,6 +1069,8 @@ static int do_ioctl(struct block_device *bdev, fmode_t mode,
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+
 static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
 				  unsigned cmd, unsigned long arg);
 static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index abb4ec6690fc..c459aeea3c0c 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -35,6 +35,7 @@
 #include <linux/seq_file.h>
 #include <linux/init.h>
 #include <linux/hdreg.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/genhd.h>
@@ -197,7 +198,7 @@ static const struct block_device_operations ida_fops  = {
 	.owner		= THIS_MODULE,
 	.open		= ida_open,
 	.release	= ida_release,
-	.locked_ioctl	= ida_ioctl,
+	.ioctl		= ida_ioctl,
 	.getgeo		= ida_getgeo,
 	.revalidate_disk= ida_revalidate,
 };
@@ -1128,7 +1129,7 @@ static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo)
  *  ida_ioctl does some miscellaneous stuff like reporting drive geometry,
  *  setting readahead and submitting commands from userspace to the controller.
  */
-static int ida_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
+static int ida_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
 {
 	drv_info_t *drv = get_drv(bdev->bd_disk);
 	ctlr_info_t *host = get_host(bdev->bd_disk);
@@ -1192,6 +1193,19 @@ out_passthru:
 	}
 		
 }
+
+static int ida_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = ida_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 /*
  * ida_ctlr_ioctl is for passing commands to the controller from userspace.
  * The command block (io) has already been copied to kernel space for us,
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 82c30f9f81ca..40419b066aa9 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -178,6 +178,7 @@ static int print_unex = 1;
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/bio.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/jiffies.h>
 #include <linux/fcntl.h>
@@ -3371,7 +3372,7 @@ static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
+static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 		    unsigned long param)
 {
 	int drive = (long)bdev->bd_disk->private_data;
@@ -3547,6 +3548,18 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 	return 0;
 }
 
+static int fd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = fd_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 static void __init config_types(void)
 {
 	bool has_drive = false;
@@ -3848,7 +3861,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner			= THIS_MODULE,
 	.open			= floppy_open,
 	.release		= floppy_release,
-	.locked_ioctl		= fd_ioctl,
+	.ioctl			= fd_ioctl,
 	.getgeo			= fd_getgeo,
 	.media_changed		= check_floppy_change,
 	.revalidate_disk	= floppy_revalidate,
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 2e74e7d475ca..6751789fb379 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -24,6 +24,7 @@
 #include <linux/errno.h>
 #include <linux/file.h>
 #include <linux/ioctl.h>
+#include <linux/smp_lock.h>
 #include <linux/compiler.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
@@ -716,9 +717,11 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
 	dprintk(DBG_IOCTL, "%s: nbd_ioctl cmd=%s(0x%x) arg=%lu\n",
 			lo->disk->disk_name, ioctl_cmd_to_ascii(cmd), cmd, arg);
 
+	lock_kernel();
 	mutex_lock(&lo->tx_lock);
 	error = __nbd_ioctl(bdev, lo, cmd, arg);
 	mutex_unlock(&lo->tx_lock);
+	unlock_kernel();
 
 	return error;
 }
@@ -726,7 +729,7 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
 static const struct block_device_operations nbd_fops =
 {
 	.owner =	THIS_MODULE,
-	.locked_ioctl =	nbd_ioctl,
+	.ioctl =	nbd_ioctl,
 };
 
 /*
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index 71acf4e53356..daba7a62a663 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -138,6 +138,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
 #include <linux/cdrom.h>
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 static DEFINE_SPINLOCK(pcd_lock);
@@ -238,7 +239,13 @@ static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
 				unsigned cmd, unsigned long arg)
 {
 	struct pcd_unit *cd = bdev->bd_disk->private_data;
-	return cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
+	int ret;
+
+	lock_kernel();
+	ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int pcd_block_media_changed(struct gendisk *disk)
@@ -251,7 +258,7 @@ static const struct block_device_operations pcd_bdops = {
 	.owner		= THIS_MODULE,
 	.open		= pcd_block_open,
 	.release	= pcd_block_release,
-	.locked_ioctl	= pcd_block_ioctl,
+	.ioctl		= pcd_block_ioctl,
 	.media_changed	= pcd_block_media_changed,
 };
 
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 4e8b9bff3abe..c4d6ed9846ca 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -153,6 +153,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_GEO, D_SBY, D_DLY, D_SLV};
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <linux/workqueue.h>
 
@@ -768,8 +769,10 @@ static int pd_ioctl(struct block_device *bdev, fmode_t mode,
 
 	switch (cmd) {
 	case CDROMEJECT:
+		lock_kernel();
 		if (disk->access == 1)
 			pd_special_command(disk, pd_eject);
+		unlock_kernel();
 		return 0;
 	default:
 		return -EINVAL;
@@ -812,7 +815,7 @@ static const struct block_device_operations pd_fops = {
 	.owner		= THIS_MODULE,
 	.open		= pd_open,
 	.release	= pd_release,
-	.locked_ioctl	= pd_ioctl,
+	.ioctl		= pd_ioctl,
 	.getgeo		= pd_getgeo,
 	.media_changed	= pd_check_media,
 	.revalidate_disk= pd_revalidate
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index c059aab3006b..38b4d566b816 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -152,6 +152,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_LUN, D_DLY};
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 static DEFINE_SPINLOCK(pf_spin_lock);
@@ -266,7 +267,7 @@ static const struct block_device_operations pf_fops = {
 	.owner		= THIS_MODULE,
 	.open		= pf_open,
 	.release	= pf_release,
-	.locked_ioctl	= pf_ioctl,
+	.ioctl		= pf_ioctl,
 	.getgeo		= pf_getgeo,
 	.media_changed	= pf_check_media,
 };
@@ -342,7 +343,10 @@ static int pf_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, u
 
 	if (pf->access != 1)
 		return -EBUSY;
+	lock_kernel();
 	pf_eject(pf);
+	unlock_kernel();
+
 	return 0;
 }
 
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 9f3e4454274b..40f1e31f42c4 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -57,6 +57,7 @@
 #include <linux/seq_file.h>
 #include <linux/miscdevice.h>
 #include <linux/freezer.h>
+#include <linux/smp_lock.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <scsi/scsi_cmnd.h>
@@ -2762,10 +2763,12 @@ out_mem:
 static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)
 {
 	struct pktcdvd_device *pd = bdev->bd_disk->private_data;
+	int ret;
 
 	VPRINTK("pkt_ioctl: cmd %x, dev %d:%d\n", cmd,
 		MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev));
 
+	lock_kernel();
 	switch (cmd) {
 	case CDROMEJECT:
 		/*
@@ -2783,14 +2786,16 @@ static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 	case CDROM_LAST_WRITTEN:
 	case CDROM_SEND_PACKET:
 	case SCSI_IOCTL_SEND_COMMAND:
-		return __blkdev_driver_ioctl(pd->bdev, mode, cmd, arg);
+		ret = __blkdev_driver_ioctl(pd->bdev, mode, cmd, arg);
+		break;
 
 	default:
 		VPRINTK(DRIVER_NAME": Unknown ioctl for %s (%x)\n", pd->name, cmd);
-		return -ENOTTY;
+		ret = -ENOTTY;
 	}
+	unlock_kernel();
 
-	return 0;
+	return ret;
 }
 
 static int pkt_media_changed(struct gendisk *disk)
@@ -2812,7 +2817,7 @@ static const struct block_device_operations pktcdvd_ops = {
 	.owner =		THIS_MODULE,
 	.open =			pkt_open,
 	.release =		pkt_close,
-	.locked_ioctl =		pkt_ioctl,
+	.ioctl =		pkt_ioctl,
 	.media_changed =	pkt_media_changed,
 };
 
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index e463657569ff..f04f74e3758f 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -20,6 +20,7 @@
 #include <linux/fd.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/hdreg.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
@@ -690,7 +691,9 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 	case FDEJECT:
 		if (fs->ref_count != 1)
 			return -EBUSY;
+		lock_kernel();
 		err = floppy_eject(fs);
+		unlock_kernel();
 		return err;
 
 	case FDGETPRM:
@@ -753,7 +756,7 @@ static const struct block_device_operations floppy_fops = {
 	.owner		 = THIS_MODULE,
 	.open		 = floppy_open,
 	.release	 = floppy_release,
-	.locked_ioctl	 = floppy_ioctl,
+	.ioctl		 = floppy_ioctl,
 	.getgeo		 = floppy_getgeo,
 	.media_changed	 = floppy_check_change,
 	.revalidate_disk = floppy_revalidate,
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index ed6fb91123ab..f3657b2a5386 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -25,6 +25,7 @@
 #include <linux/ioctl.h>
 #include <linux/blkdev.h>
 #include <linux/interrupt.h>
+#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <asm/io.h>
@@ -839,7 +840,7 @@ static int fd_eject(struct floppy_state *fs)
 static struct floppy_struct floppy_type =
 	{ 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL };	/*  7 1.44MB 3.5"   */
 
-static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned int cmd, unsigned long param)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
@@ -867,6 +868,18 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
 	return -ENOTTY;
 }
 
+static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+				 unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = floppy_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 static int floppy_open(struct block_device *bdev, fmode_t mode)
 {
 	struct floppy_state *fs = bdev->bd_disk->private_data;
@@ -997,7 +1010,7 @@ static int floppy_revalidate(struct gendisk *disk)
 static const struct block_device_operations floppy_fops = {
 	.open		= floppy_open,
 	.release	= floppy_release,
-	.locked_ioctl	= floppy_ioctl,
+	.ioctl		= floppy_ioctl,
 	.media_changed	= floppy_check_change,
 	.revalidate_disk= floppy_revalidate,
 };
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index aaf27fb4efd6..102ed52d0e0f 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -28,6 +28,7 @@
 #include <linux/timer.h>
 #include <linux/scatterlist.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <scsi/scsi.h>
 
 #define DRV_NAME "ub"
@@ -1729,8 +1730,13 @@ static int ub_bd_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	struct gendisk *disk = bdev->bd_disk;
 	void __user *usermem = (void __user *) arg;
+	int ret;
+
+	lock_kernel();
+	ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
+	unlock_kernel();
 
-	return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
+	return ret;
 }
 
 /*
@@ -1794,7 +1800,7 @@ static const struct block_device_operations ub_bd_fops = {
 	.owner		= THIS_MODULE,
 	.open		= ub_bd_open,
 	.release	= ub_bd_release,
-	.locked_ioctl	= ub_bd_ioctl,
+	.ioctl		= ub_bd_ioctl,
 	.media_changed	= ub_bd_media_changed,
 	.revalidate_disk = ub_bd_revalidate,
 };
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 0a3222fd4442..7b0f7b624adf 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -2,6 +2,7 @@
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/hdreg.h>
 #include <linux/virtio.h>
 #include <linux/virtio_blk.h>
@@ -217,7 +218,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
 	return blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
 }
 
-static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
+static int virtblk_locked_ioctl(struct block_device *bdev, fmode_t mode,
 			 unsigned cmd, unsigned long data)
 {
 	struct gendisk *disk = bdev->bd_disk;
@@ -243,6 +244,18 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
 			      (void __user *)data);
 }
 
+static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = virtblk_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 /* We provide getgeo only to please some old bootloader/partitioning tools */
 static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
 {
@@ -269,7 +282,7 @@ static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
 }
 
 static const struct block_device_operations virtblk_fops = {
-	.locked_ioctl = virtblk_ioctl,
+	.ioctl  = virtblk_ioctl,
 	.owner  = THIS_MODULE,
 	.getgeo = virtblk_getgeo,
 };
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index b16a3a926cf2..d5a3cd750561 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -46,6 +46,7 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/blkpg.h>
 #include <linux/delay.h>
 #include <linux/io.h>
@@ -133,7 +134,7 @@ static int xd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 
 static const struct block_device_operations xd_fops = {
 	.owner	= THIS_MODULE,
-	.locked_ioctl	= xd_ioctl,
+	.ioctl	= xd_ioctl,
 	.getgeo = xd_getgeo,
 };
 static DECLARE_WAIT_QUEUE_HEAD(xd_wait_int);
@@ -347,7 +348,7 @@ static int xd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 }
 
 /* xd_ioctl: handle device ioctl's */
-static int xd_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long arg)
+static int xd_locked_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long arg)
 {
 	switch (cmd) {
 		case HDIO_SET_DMA:
@@ -375,6 +376,18 @@ static int xd_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long a
 	}
 }
 
+static int xd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long param)
+{
+	int ret;
+
+	lock_kernel();
+	ret = xd_locked_ioctl(bdev, mode, cmd, param);
+	unlock_kernel();
+
+	return ret;
+}
+
 /* xd_readwrite: handle a read/write request */
 static int xd_readwrite (u_char operation,XD_INFO *p,char *buffer,u_int block,u_int count)
 {
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 76af65b654e3..9119cd3d56a4 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1045,7 +1045,7 @@ static const struct block_device_operations xlvbd_block_fops =
 	.open = blkif_open,
 	.release = blkif_release,
 	.getgeo = blkif_getgeo,
-	.locked_ioctl = blkif_ioctl,
+	.ioctl = blkif_ioctl,
 };
 
 
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 5219b57deb36..1772fd914fb9 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -34,6 +34,7 @@
 #include <linux/blkdev.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 #include <linux/platform_device.h>
@@ -509,7 +510,13 @@ static int gdrom_bdops_mediachanged(struct gendisk *disk)
 static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
 	unsigned cmd, unsigned long arg)
 {
-	return cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
+	int ret;
+
+	lock_kernel();
+	ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
 }
 
 static const struct block_device_operations gdrom_bdops = {
@@ -517,7 +524,7 @@ static const struct block_device_operations gdrom_bdops = {
 	.open			= gdrom_bdops_open,
 	.release		= gdrom_bdops_release,
 	.media_changed		= gdrom_bdops_mediachanged,
-	.locked_ioctl		= gdrom_bdops_ioctl,
+	.ioctl			= gdrom_bdops_ioctl,
 };
 
 static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id)
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 1fa6628d150b..16dada0627ee 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -42,6 +42,7 @@
 #include <linux/module.h>
 #include <linux/completion.h>
 #include <linux/proc_fs.h>
+#include <linux/smp_lock.h>
 #include <linux/seq_file.h>
 #include <linux/scatterlist.h>
 
@@ -167,7 +168,13 @@ static int viocd_blk_ioctl(struct block_device *bdev, fmode_t mode,
 		unsigned cmd, unsigned long arg)
 {
 	struct disk_info *di = bdev->bd_disk->private_data;
-	return cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg);
+	int ret;
+
+	lock_kernel();
+	ret = cdrom_ioctl(&di->viocd_info, bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int viocd_blk_media_changed(struct gendisk *disk)
@@ -180,7 +187,7 @@ static const struct block_device_operations viocd_fops = {
 	.owner =		THIS_MODULE,
 	.open =			viocd_blk_open,
 	.release =		viocd_blk_release,
-	.locked_ioctl =		viocd_blk_ioctl,
+	.ioctl =		viocd_blk_ioctl,
 	.media_changed =	viocd_blk_media_changed,
 };
 
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index ef7e3a9bee51..bf9f61a5c2f8 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/timer.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/errno.h>
@@ -1654,7 +1655,7 @@ static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
 	return 0;
 }
 
-static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
+static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned int cmd, unsigned long arg)
 {
 	struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
@@ -1676,6 +1677,19 @@ static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
 	return err;
 }
 
+static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
+
+
 static int idecd_media_changed(struct gendisk *disk)
 {
 	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
@@ -1696,7 +1710,7 @@ static const struct block_device_operations idecd_ops = {
 	.owner			= THIS_MODULE,
 	.open			= idecd_open,
 	.release		= idecd_release,
-	.locked_ioctl		= idecd_ioctl,
+	.ioctl			= idecd_ioctl,
 	.media_changed		= idecd_media_changed,
 	.revalidate_disk	= idecd_revalidate_disk
 };
diff --git a/drivers/ide/ide-disk_ioctl.c b/drivers/ide/ide-disk_ioctl.c
index 7b783dd7c0be..ec94c66918f6 100644
--- a/drivers/ide/ide-disk_ioctl.c
+++ b/drivers/ide/ide-disk_ioctl.c
@@ -1,6 +1,7 @@
 #include <linux/kernel.h>
 #include <linux/ide.h>
 #include <linux/hdreg.h>
+#include <linux/smp_lock.h>
 
 #include "ide-disk.h"
 
@@ -18,9 +19,13 @@ int ide_disk_ioctl(ide_drive_t *drive, struct block_device *bdev, fmode_t mode,
 {
 	int err;
 
+	lock_kernel();
 	err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_disk_ioctl_settings);
 	if (err != -EOPNOTSUPP)
-		return err;
+		goto out;
 
-	return generic_ide_ioctl(drive, bdev, cmd, arg);
+	err = generic_ide_ioctl(drive, bdev, cmd, arg);
+out:
+	unlock_kernel();
+	return err;
 }
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
index 9c2288234dea..fd3d05ab3417 100644
--- a/drivers/ide/ide-floppy_ioctl.c
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -5,6 +5,7 @@
 #include <linux/kernel.h>
 #include <linux/ide.h>
 #include <linux/cdrom.h>
+#include <linux/smp_lock.h>
 
 #include <asm/unaligned.h>
 
@@ -275,12 +276,15 @@ int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev,
 	void __user *argp = (void __user *)arg;
 	int err;
 
-	if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
-		return ide_floppy_lockdoor(drive, &pc, arg, cmd);
+	lock_kernel();
+	if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) {
+		err = ide_floppy_lockdoor(drive, &pc, arg, cmd);
+		goto out;
+	}
 
 	err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp);
 	if (err != -ENOTTY)
-		return err;
+		goto out;
 
 	/*
 	 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
@@ -293,5 +297,7 @@ int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev,
 	if (err == -ENOTTY)
 		err = generic_ide_ioctl(drive, bdev, cmd, arg);
 
+out:
+	unlock_kernel();
 	return err;
 }
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index c102d23d9b38..883f0c979c9f 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -323,7 +323,7 @@ static const struct block_device_operations ide_gd_ops = {
 	.owner			= THIS_MODULE,
 	.open			= ide_gd_open,
 	.release		= ide_gd_release,
-	.locked_ioctl		= ide_gd_ioctl,
+	.ioctl			= ide_gd_ioctl,
 	.getgeo			= ide_gd_getgeo,
 	.media_changed		= ide_gd_media_changed,
 	.unlock_native_capacity	= ide_gd_unlock_native_capacity,
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 635fd72d4728..39b0a5c45f07 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -32,6 +32,7 @@
 #include <linux/errno.h>
 #include <linux/genhd.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
@@ -1927,9 +1928,14 @@ static int idetape_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	struct ide_tape_obj *tape = ide_drv_g(bdev->bd_disk, ide_tape_obj);
 	ide_drive_t *drive = tape->drive;
-	int err = generic_ide_ioctl(drive, bdev, cmd, arg);
+	int err;
+
+	lock_kernel();
+	err = generic_ide_ioctl(drive, bdev, cmd, arg);
 	if (err == -EINVAL)
 		err = idetape_blkdev_ioctl(drive, cmd, arg);
+	unlock_kernel();
+
 	return err;
 }
 
@@ -1937,7 +1943,7 @@ static const struct block_device_operations idetape_block_ops = {
 	.owner		= THIS_MODULE,
 	.open		= idetape_open,
 	.release	= idetape_release,
-	.locked_ioctl	= idetape_ioctl,
+	.ioctl		= idetape_ioctl,
 };
 
 static int ide_tape_probe(ide_drive_t *drive)
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index b8233ff863e3..d1bdf8abe5db 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -53,7 +53,6 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2o.h>
-#include <linux/smp_lock.h>
 
 #include <linux/mempool.h>
 
@@ -653,40 +652,30 @@ static int i2o_block_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	struct gendisk *disk = bdev->bd_disk;
 	struct i2o_block_device *dev = disk->private_data;
-	int ret = -ENOTTY;
 
 	/* Anyone capable of this syscall can do *real bad* things */
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	lock_kernel();
 	switch (cmd) {
 	case BLKI2OGRSTRAT:
-		ret = put_user(dev->rcache, (int __user *)arg);
-		break;
+		return put_user(dev->rcache, (int __user *)arg);
 	case BLKI2OGWSTRAT:
-		ret = put_user(dev->wcache, (int __user *)arg);
-		break;
+		return put_user(dev->wcache, (int __user *)arg);
 	case BLKI2OSRSTRAT:
-		ret = -EINVAL;
 		if (arg < 0 || arg > CACHE_SMARTFETCH)
-			break;
+			return -EINVAL;
 		dev->rcache = arg;
-		ret = 0;
 		break;
 	case BLKI2OSWSTRAT:
-		ret = -EINVAL;
 		if (arg != 0
 		    && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK))
-			break;
+			return -EINVAL;
 		dev->wcache = arg;
-		ret = 0;
 		break;
 	}
-	unlock_kernel();
-
-	return ret;
+	return -ENOTTY;
 };
 
 /**
@@ -942,7 +931,6 @@ static const struct block_device_operations i2o_block_fops = {
 	.open = i2o_block_open,
 	.release = i2o_block_release,
 	.ioctl = i2o_block_ioctl,
-	.compat_ioctl = i2o_block_ioctl,
 	.getgeo = i2o_block_getgeo,
 	.media_changed = i2o_block_media_changed
 };
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 475af42745cb..8c83b11a77d5 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -15,6 +15,7 @@
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/hdreg.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
@@ -237,6 +238,7 @@ static int blktrans_ioctl(struct block_device *bdev, fmode_t mode,
 	if (!dev)
 		return ret;
 
+	lock_kernel();
 	mutex_lock(&dev->lock);
 
 	if (!dev->mtd)
@@ -250,6 +252,7 @@ static int blktrans_ioctl(struct block_device *bdev, fmode_t mode,
 	}
 unlock:
 	mutex_unlock(&dev->lock);
+	unlock_kernel();
 	blktrans_dev_put(dev);
 	return ret;
 }
@@ -258,7 +261,7 @@ static const struct block_device_operations mtd_blktrans_ops = {
 	.owner		= THIS_MODULE,
 	.open		= blktrans_open,
 	.release	= blktrans_release,
-	.locked_ioctl	= blktrans_ioctl,
+	.ioctl		= blktrans_ioctl,
 	.getgeo		= blktrans_getgeo,
 };
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 1d0c4b7c3b69..633ac32b25c1 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -46,6 +46,7 @@
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
 #include <linux/delay.h>
+#include <linux/smp_lock.h>
 #include <linux/mutex.h>
 #include <linux/string_helpers.h>
 #include <linux/async.h>
@@ -924,6 +925,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n",
 						disk->disk_name, cmd));
 
+	lock_kernel();
 	/*
 	 * If we are in the middle of error recovery, don't let anyone
 	 * else try and use this device.  Also, if error recovery fails, it
@@ -933,7 +935,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	error = scsi_nonblockable_ioctl(sdp, cmd, p,
 					(mode & FMODE_NDELAY) != 0);
 	if (!scsi_block_when_processing_errors(sdp) || !error)
-		return error;
+		goto out;
 
 	/*
 	 * Send SCSI addressing ioctls directly to mid level, send other
@@ -943,13 +945,18 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	switch (cmd) {
 		case SCSI_IOCTL_GET_IDLUN:
 		case SCSI_IOCTL_GET_BUS_NUMBER:
-			return scsi_ioctl(sdp, cmd, p);
+			error = scsi_ioctl(sdp, cmd, p);
+			break;
 		default:
 			error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
 			if (error != -ENOTTY)
-				return error;
+				break;
+			error = scsi_ioctl(sdp, cmd, p);
+			break;
 	}
-	return scsi_ioctl(sdp, cmd, p);
+out:
+	unlock_kernel();
+	return error;
 }
 
 static void set_media_not_present(struct scsi_disk *sdkp)
@@ -1123,7 +1130,7 @@ static const struct block_device_operations sd_fops = {
 	.owner			= THIS_MODULE,
 	.open			= sd_open,
 	.release		= sd_release,
-	.locked_ioctl		= sd_ioctl,
+	.ioctl			= sd_ioctl,
 	.getgeo			= sd_getgeo,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl		= sd_compat_ioctl,
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 0a90abc7f140..d42fa6468f41 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -44,6 +44,7 @@
 #include <linux/init.h>
 #include <linux/blkdev.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <asm/uaccess.h>
 
@@ -493,6 +494,8 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	void __user *argp = (void __user *)arg;
 	int ret;
 
+	lock_kernel();
+
 	/*
 	 * Send SCSI addressing ioctls directly to mid level, send other
 	 * ioctls to cdrom/block level.
@@ -500,12 +503,13 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	switch (cmd) {
 	case SCSI_IOCTL_GET_IDLUN:
 	case SCSI_IOCTL_GET_BUS_NUMBER:
-		return scsi_ioctl(sdev, cmd, argp);
+		ret = scsi_ioctl(sdev, cmd, argp);
+		goto out;
 	}
 
 	ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
 	if (ret != -ENOSYS)
-		return ret;
+		goto out;
 
 	/*
 	 * ENODEV means that we didn't recognise the ioctl, or that we
@@ -516,8 +520,12 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	ret = scsi_nonblockable_ioctl(sdev, cmd, argp,
 					(mode & FMODE_NDELAY) != 0);
 	if (ret != -ENODEV)
-		return ret;
-	return scsi_ioctl(sdev, cmd, argp);
+		goto out;
+	ret = scsi_ioctl(sdev, cmd, argp);
+
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int sr_block_media_changed(struct gendisk *disk)
@@ -531,7 +539,7 @@ static const struct block_device_operations sr_bdops =
 	.owner		= THIS_MODULE,
 	.open		= sr_block_open,
 	.release	= sr_block_release,
-	.locked_ioctl	= sr_block_ioctl,
+	.ioctl		= sr_block_ioctl,
 	.media_changed	= sr_block_media_changed,
 	/* 
 	 * No compat_ioctl for now because sr_block_ioctl never
-- 
cgit v1.2.3


From 6e9624b8caec290d28b4c6d9ec75749df6372b87 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Sat, 7 Aug 2010 18:25:34 +0200
Subject: block: push down BKL into .open and .release

The open and release block_device_operations are currently
called with the BKL held. In order to change that, we must
first make sure that all drivers that currently rely
on this have no regressions.

This blindly pushes the BKL into all .open and .release
operations for all block drivers to prepare for the
next step. The drivers can subsequently replace the BKL
with their own locks or remove it completely when it can
be shown that it is not needed.

The functions blkdev_get and blkdev_put are the only
remaining users of the big kernel lock in the block
layer, besides a few uses in the ioctl code, none
of which need to serialize with blkdev_{get,put}.

Most of these two functions is also under the protection
of bdev->bd_mutex, including the actual calls to
->open and ->release, and the common code does not
access any global data structures that need the BKL.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/DAC960.c              | 13 +++++++++----
 drivers/block/amiflop.c             | 12 ++++++++++--
 drivers/block/aoe/aoeblk.c          |  4 ++++
 drivers/block/ataflop.c             | 14 +++++++++++++-
 drivers/block/cciss.c               | 23 ++++++++++++++++++++---
 drivers/block/cpqarray.c            | 22 +++++++++++++++++++---
 drivers/block/drbd/drbd_main.c      |  4 ++++
 drivers/block/floppy.c              |  5 +++++
 drivers/block/loop.c                |  5 +++++
 drivers/block/paride/pcd.c          | 10 +++++++++-
 drivers/block/paride/pd.c           |  4 ++++
 drivers/block/paride/pf.c           | 20 +++++++++++++++-----
 drivers/block/pktcdvd.c             |  5 +++++
 drivers/block/swim.c                | 15 ++++++++++++++-
 drivers/block/swim3.c               | 15 ++++++++++++++-
 drivers/block/ub.c                  | 17 ++++++++++++++++-
 drivers/block/viodasd.c             | 19 ++++++++++++++++++-
 drivers/block/xen-blkfront.c        |  7 +++++++
 drivers/block/xsysace.c             |  6 ++++++
 drivers/block/z2ram.c               | 13 ++++++++++---
 drivers/cdrom/gdrom.c               |  8 +++++++-
 drivers/cdrom/viocd.c               | 10 +++++++++-
 drivers/ide/ide-cd.c                | 14 +++++++++-----
 drivers/ide/ide-gd.c                | 17 ++++++++++++++++-
 drivers/ide/ide-tape.c              |  9 ++++++++-
 drivers/md/dm.c                     |  7 +++++++
 drivers/md/md.c                     |  6 ++++++
 drivers/memstick/core/mspro_block.c |  9 ++++++++-
 drivers/message/i2o/i2o_block.c     |  5 +++++
 drivers/mmc/card/block.c            |  5 +++++
 drivers/mtd/mtd_blkdevs.c           |  6 +++++-
 drivers/s390/block/dasd.c           |  6 ++++++
 drivers/s390/block/dcssblk.c        |  5 +++++
 drivers/s390/char/tape_block.c      |  8 +++++++-
 drivers/scsi/sd.c                   |  5 +++++
 drivers/scsi/sr.c                   |  7 ++++++-
 drivers/staging/hv/blkvsc_drv.c     |  5 +++++
 37 files changed, 326 insertions(+), 39 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index c5f22bb0a48e..4e2c367fec11 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -79,23 +79,28 @@ static int DAC960_open(struct block_device *bdev, fmode_t mode)
 	struct gendisk *disk = bdev->bd_disk;
 	DAC960_Controller_T *p = disk->queue->queuedata;
 	int drive_nr = (long)disk->private_data;
+	int ret = -ENXIO;
 
+	lock_kernel();
 	if (p->FirmwareType == DAC960_V1_Controller) {
 		if (p->V1.LogicalDriveInformation[drive_nr].
 		    LogicalDriveState == DAC960_V1_LogicalDrive_Offline)
-			return -ENXIO;
+			goto out;
 	} else {
 		DAC960_V2_LogicalDeviceInfo_T *i =
 			p->V2.LogicalDeviceInformation[drive_nr];
 		if (!i || i->LogicalDeviceState == DAC960_V2_LogicalDevice_Offline)
-			return -ENXIO;
+			goto out;
 	}
 
 	check_disk_change(bdev);
 
 	if (!get_capacity(p->disks[drive_nr]))
-		return -ENXIO;
-	return 0;
+		goto out;
+	ret = 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int DAC960_getgeo(struct block_device *bdev, struct hd_geometry *geo)
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 0fa26359304c..76f114f0bba3 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1555,10 +1555,13 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	int old_dev;
 	unsigned long flags;
 
+	lock_kernel();
 	old_dev = fd_device[drive];
 
-	if (fd_ref[drive] && old_dev != system)
+	if (fd_ref[drive] && old_dev != system) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
 	if (mode & (FMODE_READ|FMODE_WRITE)) {
 		check_disk_change(bdev);
@@ -1571,8 +1574,10 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 			fd_deselect (drive);
 			rel_fdc();
 
-			if (wrprot)
+			if (wrprot) {
+				unlock_kernel();
 				return -EROFS;
+			}
 		}
 	}
 
@@ -1589,6 +1594,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	printk(KERN_INFO "fd%d: accessing %s-disk with %s-layout\n",drive,
 	       unit[drive].type->name, data_types[system].name);
 
+	unlock_kernel();
 	return 0;
 }
 
@@ -1597,6 +1603,7 @@ static int floppy_release(struct gendisk *disk, fmode_t mode)
 	struct amiga_floppy_struct *p = disk->private_data;
 	int drive = p - unit;
 
+	lock_kernel();
 	if (unit[drive].dirty == 1) {
 		del_timer (flush_track_timer + drive);
 		non_int_flush_track (drive);
@@ -1610,6 +1617,7 @@ static int floppy_release(struct gendisk *disk, fmode_t mode)
 /* the mod_use counter is handled this way */
 	floppy_off (drive | 0x40000000);
 #endif
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 65deffde60ac..a946929735a5 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/genhd.h>
 #include <linux/netdevice.h>
+#include <linux/smp_lock.h>
 #include "aoe.h"
 
 static struct kmem_cache *buf_pool_cache;
@@ -124,13 +125,16 @@ aoeblk_open(struct block_device *bdev, fmode_t mode)
 	struct aoedev *d = bdev->bd_disk->private_data;
 	ulong flags;
 
+	lock_kernel();
 	spin_lock_irqsave(&d->lock, flags);
 	if (d->flags & DEVFL_UP) {
 		d->nopen++;
 		spin_unlock_irqrestore(&d->lock, flags);
+		unlock_kernel();
 		return 0;
 	}
 	spin_unlock_irqrestore(&d->lock, flags);
+	unlock_kernel();
 	return -ENODEV;
 }
 
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 1bb8bfcfdbd9..aceb96476524 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1850,22 +1850,34 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
+static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = floppy_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
 
 static int floppy_release(struct gendisk *disk, fmode_t mode)
 {
 	struct atari_floppy_struct *p = disk->private_data;
+	lock_kernel();
 	if (p->ref < 0)
 		p->ref = 0;
 	else if (!p->ref--) {
 		printk(KERN_ERR "floppy_release with fd_ref == 0");
 		p->ref = 0;
 	}
+	unlock_kernel();
 	return 0;
 }
 
 static const struct block_device_operations floppy_fops = {
 	.owner		= THIS_MODULE,
-	.open		= floppy_open,
+	.open		= floppy_unlocked_open,
 	.release	= floppy_release,
 	.ioctl		= fd_ioctl,
 	.media_changed	= check_floppy_change,
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index a6c0494dd054..665a470310a9 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -178,6 +178,7 @@ static void do_cciss_request(struct request_queue *q);
 static irqreturn_t do_cciss_intx(int irq, void *dev_id);
 static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
 static int cciss_open(struct block_device *bdev, fmode_t mode);
+static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode);
 static int cciss_release(struct gendisk *disk, fmode_t mode);
 static int do_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned int cmd, unsigned long arg);
@@ -237,7 +238,7 @@ static int cciss_compat_ioctl(struct block_device *, fmode_t,
 
 static const struct block_device_operations cciss_fops = {
 	.owner = THIS_MODULE,
-	.open = cciss_open,
+	.open = cciss_unlocked_open,
 	.release = cciss_release,
 	.ioctl = do_ioctl,
 	.getgeo = cciss_getgeo,
@@ -1042,13 +1043,28 @@ static int cciss_open(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
+static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = cciss_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
 /*
  * Close.  Sync first.
  */
 static int cciss_release(struct gendisk *disk, fmode_t mode)
 {
-	ctlr_info_t *host = get_host(disk);
-	drive_info_struct *drv = get_drv(disk);
+	ctlr_info_t *host;
+	drive_info_struct *drv;
+
+	lock_kernel();
+	host = get_host(disk);
+	drv = get_drv(disk);
 
 #ifdef CCISS_DEBUG
 	printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
@@ -1056,6 +1072,7 @@ static int cciss_release(struct gendisk *disk, fmode_t mode)
 
 	drv->usage_count--;
 	host->usage_count--;
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index c459aeea3c0c..28937b661564 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -158,7 +158,7 @@ static int sendcmd(
 	unsigned int blkcnt,
 	unsigned int log_unit );
 
-static int ida_open(struct block_device *bdev, fmode_t mode);
+static int ida_unlocked_open(struct block_device *bdev, fmode_t mode);
 static int ida_release(struct gendisk *disk, fmode_t mode);
 static int ida_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg);
 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -196,7 +196,7 @@ static inline ctlr_info_t *get_host(struct gendisk *disk)
 
 static const struct block_device_operations ida_fops  = {
 	.owner		= THIS_MODULE,
-	.open		= ida_open,
+	.open		= ida_unlocked_open,
 	.release	= ida_release,
 	.ioctl		= ida_ioctl,
 	.getgeo		= ida_getgeo,
@@ -841,13 +841,29 @@ static int ida_open(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
+static int ida_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = ida_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
 /*
  * Close.  Sync first.
  */
 static int ida_release(struct gendisk *disk, fmode_t mode)
 {
-	ctlr_info_t *host = get_host(disk);
+	ctlr_info_t *host;
+
+	lock_kernel();
+	host = get_host(disk);
 	host->usage_count--;
+	unlock_kernel();
+
 	return 0;
 }
 
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index e2ab13d99d69..d2b6764a7b1f 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2604,6 +2604,7 @@ static int drbd_open(struct block_device *bdev, fmode_t mode)
 	unsigned long flags;
 	int rv = 0;
 
+	lock_kernel();
 	spin_lock_irqsave(&mdev->req_lock, flags);
 	/* to have a stable mdev->state.role
 	 * and no race with updating open_cnt */
@@ -2618,6 +2619,7 @@ static int drbd_open(struct block_device *bdev, fmode_t mode)
 	if (!rv)
 		mdev->open_cnt++;
 	spin_unlock_irqrestore(&mdev->req_lock, flags);
+	unlock_kernel();
 
 	return rv;
 }
@@ -2625,7 +2627,9 @@ static int drbd_open(struct block_device *bdev, fmode_t mode)
 static int drbd_release(struct gendisk *gd, fmode_t mode)
 {
 	struct drbd_conf *mdev = gd->private_data;
+	lock_kernel();
 	mdev->open_cnt--;
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 40419b066aa9..3126d5122b2b 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3616,6 +3616,7 @@ static int floppy_release(struct gendisk *disk, fmode_t mode)
 {
 	int drive = (long)disk->private_data;
 
+	lock_kernel();
 	mutex_lock(&open_lock);
 	if (UDRS->fd_ref < 0)
 		UDRS->fd_ref = 0;
@@ -3626,6 +3627,7 @@ static int floppy_release(struct gendisk *disk, fmode_t mode)
 	if (!UDRS->fd_ref)
 		opened_bdev[drive] = NULL;
 	mutex_unlock(&open_lock);
+	unlock_kernel();
 
 	return 0;
 }
@@ -3643,6 +3645,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	int res = -EBUSY;
 	char *tmp;
 
+	lock_kernel();
 	mutex_lock(&open_lock);
 	old_dev = UDRS->fd_device;
 	if (opened_bdev[drive] && opened_bdev[drive] != bdev)
@@ -3719,6 +3722,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 			goto out;
 	}
 	mutex_unlock(&open_lock);
+	unlock_kernel();
 	return 0;
 out:
 	if (UDRS->fd_ref < 0)
@@ -3729,6 +3733,7 @@ out:
 		opened_bdev[drive] = NULL;
 out2:
 	mutex_unlock(&open_lock);
+	unlock_kernel();
 	return res;
 }
 
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index d285a5481965..f3c636d23718 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -67,6 +67,7 @@
 #include <linux/compat.h>
 #include <linux/suspend.h>
 #include <linux/freezer.h>
+#include <linux/smp_lock.h>
 #include <linux/writeback.h>
 #include <linux/buffer_head.h>		/* for invalidate_bdev() */
 #include <linux/completion.h>
@@ -1408,9 +1409,11 @@ static int lo_open(struct block_device *bdev, fmode_t mode)
 {
 	struct loop_device *lo = bdev->bd_disk->private_data;
 
+	lock_kernel();
 	mutex_lock(&lo->lo_ctl_mutex);
 	lo->lo_refcnt++;
 	mutex_unlock(&lo->lo_ctl_mutex);
+	unlock_kernel();
 
 	return 0;
 }
@@ -1420,6 +1423,7 @@ static int lo_release(struct gendisk *disk, fmode_t mode)
 	struct loop_device *lo = disk->private_data;
 	int err;
 
+	lock_kernel();
 	mutex_lock(&lo->lo_ctl_mutex);
 
 	if (--lo->lo_refcnt)
@@ -1444,6 +1448,7 @@ static int lo_release(struct gendisk *disk, fmode_t mode)
 out:
 	mutex_unlock(&lo->lo_ctl_mutex);
 out_unlocked:
+	lock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index daba7a62a663..76f8565e1e8d 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -225,13 +225,21 @@ static char *pcd_buf;		/* buffer for request in progress */
 static int pcd_block_open(struct block_device *bdev, fmode_t mode)
 {
 	struct pcd_unit *cd = bdev->bd_disk->private_data;
-	return cdrom_open(&cd->info, bdev, mode);
+	int ret;
+
+	lock_kernel();
+	ret = cdrom_open(&cd->info, bdev, mode);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int pcd_block_release(struct gendisk *disk, fmode_t mode)
 {
 	struct pcd_unit *cd = disk->private_data;
+	lock_kernel();
 	cdrom_release(&cd->info, mode);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index c4d6ed9846ca..985f0d4f1d1e 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -736,12 +736,14 @@ static int pd_open(struct block_device *bdev, fmode_t mode)
 {
 	struct pd_unit *disk = bdev->bd_disk->private_data;
 
+	lock_kernel();
 	disk->access++;
 
 	if (disk->removable) {
 		pd_special_command(disk, pd_media_check);
 		pd_special_command(disk, pd_door_lock);
 	}
+	unlock_kernel();
 	return 0;
 }
 
@@ -783,8 +785,10 @@ static int pd_release(struct gendisk *p, fmode_t mode)
 {
 	struct pd_unit *disk = p->private_data;
 
+	lock_kernel();
 	if (!--disk->access && disk->removable)
 		pd_special_command(disk, pd_door_unlock);
+	unlock_kernel();
 
 	return 0;
 }
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index 38b4d566b816..4457b494882a 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -300,20 +300,26 @@ static void __init pf_init_units(void)
 static int pf_open(struct block_device *bdev, fmode_t mode)
 {
 	struct pf_unit *pf = bdev->bd_disk->private_data;
+	int ret;
 
+	lock_kernel();
 	pf_identify(pf);
 
+	ret = -ENODEV;
 	if (pf->media_status == PF_NM)
-		return -ENODEV;
+		goto out;
 
+	ret = -EROFS;
 	if ((pf->media_status == PF_RO) && (mode & FMODE_WRITE))
-		return -EROFS;
+		goto out;
 
+	ret = 0;
 	pf->access++;
 	if (pf->removable)
 		pf_lock(pf, 1);
-
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int pf_getgeo(struct block_device *bdev, struct hd_geometry *geo)
@@ -354,14 +360,18 @@ static int pf_release(struct gendisk *disk, fmode_t mode)
 {
 	struct pf_unit *pf = disk->private_data;
 
-	if (pf->access <= 0)
+	lock_kernel();
+	if (pf->access <= 0) {
+		unlock_kernel();
 		return -EINVAL;
+	}
 
 	pf->access--;
 
 	if (!pf->access && pf->removable)
 		pf_lock(pf, 0);
 
+	unlock_kernel();
 	return 0;
 
 }
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 40f1e31f42c4..b1cbeb59bb76 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2383,6 +2383,7 @@ static int pkt_open(struct block_device *bdev, fmode_t mode)
 
 	VPRINTK(DRIVER_NAME": entering open\n");
 
+	lock_kernel();
 	mutex_lock(&ctl_mutex);
 	pd = pkt_find_dev_from_minor(MINOR(bdev->bd_dev));
 	if (!pd) {
@@ -2410,6 +2411,7 @@ static int pkt_open(struct block_device *bdev, fmode_t mode)
 	}
 
 	mutex_unlock(&ctl_mutex);
+	unlock_kernel();
 	return 0;
 
 out_dec:
@@ -2417,6 +2419,7 @@ out_dec:
 out:
 	VPRINTK(DRIVER_NAME": failed open (%d)\n", ret);
 	mutex_unlock(&ctl_mutex);
+	unlock_kernel();
 	return ret;
 }
 
@@ -2425,6 +2428,7 @@ static int pkt_close(struct gendisk *disk, fmode_t mode)
 	struct pktcdvd_device *pd = disk->private_data;
 	int ret = 0;
 
+	lock_kernel();
 	mutex_lock(&ctl_mutex);
 	pd->refcnt--;
 	BUG_ON(pd->refcnt < 0);
@@ -2433,6 +2437,7 @@ static int pkt_close(struct gendisk *disk, fmode_t mode)
 		pkt_release_dev(pd, flush);
 	}
 	mutex_unlock(&ctl_mutex);
+	unlock_kernel();
 	return ret;
 }
 
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index f04f74e3758f..2e46815876df 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -662,11 +662,23 @@ out:
 	return err;
 }
 
+static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = floppy_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
 static int floppy_release(struct gendisk *disk, fmode_t mode)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim __iomem *base = fs->swd->base;
 
+	lock_kernel();
 	if (fs->ref_count < 0)
 		fs->ref_count = 0;
 	else if (fs->ref_count > 0)
@@ -674,6 +686,7 @@ static int floppy_release(struct gendisk *disk, fmode_t mode)
 
 	if (fs->ref_count == 0)
 		swim_motor(base, OFF);
+	unlock_kernel();
 
 	return 0;
 }
@@ -754,7 +767,7 @@ static int floppy_revalidate(struct gendisk *disk)
 
 static const struct block_device_operations floppy_fops = {
 	.owner		 = THIS_MODULE,
-	.open		 = floppy_open,
+	.open		 = floppy_unlocked_open,
 	.release	 = floppy_release,
 	.ioctl		 = floppy_ioctl,
 	.getgeo		 = floppy_getgeo,
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index f3657b2a5386..cc6a3864822c 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -949,15 +949,28 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
+static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = floppy_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
 static int floppy_release(struct gendisk *disk, fmode_t mode)
 {
 	struct floppy_state *fs = disk->private_data;
 	struct swim3 __iomem *sw = fs->swim3;
+	lock_kernel();
 	if (fs->ref_count > 0 && --fs->ref_count == 0) {
 		swim3_action(fs, MOTOR_OFF);
 		out_8(&sw->control_bic, 0xff);
 		swim3_select(fs, RELAX);
 	}
+	unlock_kernel();
 	return 0;
 }
 
@@ -1008,7 +1021,7 @@ static int floppy_revalidate(struct gendisk *disk)
 }
 
 static const struct block_device_operations floppy_fops = {
-	.open		= floppy_open,
+	.open		= floppy_unlocked_open,
 	.release	= floppy_release,
 	.ioctl		= floppy_ioctl,
 	.media_changed	= floppy_check_change,
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 102ed52d0e0f..c48e14878582 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -1711,6 +1711,18 @@ err_open:
 	return rc;
 }
 
+static int ub_bd_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = ub_bd_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
+
 /*
  */
 static int ub_bd_release(struct gendisk *disk, fmode_t mode)
@@ -1718,7 +1730,10 @@ static int ub_bd_release(struct gendisk *disk, fmode_t mode)
 	struct ub_lun *lun = disk->private_data;
 	struct ub_dev *sc = lun->udev;
 
+	lock_kernel();
 	ub_put(sc);
+	unlock_kernel();
+
 	return 0;
 }
 
@@ -1798,7 +1813,7 @@ static int ub_bd_media_changed(struct gendisk *disk)
 
 static const struct block_device_operations ub_bd_fops = {
 	.owner		= THIS_MODULE,
-	.open		= ub_bd_open,
+	.open		= ub_bd_unlocked_open,
 	.release	= ub_bd_release,
 	.ioctl		= ub_bd_ioctl,
 	.media_changed	= ub_bd_media_changed,
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index 5663d3c284c8..f651e51a3319 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -41,6 +41,7 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/string.h>
+#include <linux/smp_lock.h>
 #include <linux/dma-mapping.h>
 #include <linux/completion.h>
 #include <linux/device.h>
@@ -175,6 +176,18 @@ static int viodasd_open(struct block_device *bdev, fmode_t mode)
 	return 0;
 }
 
+static int viodasd_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = viodasd_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
+
 /*
  * External release entry point.
  */
@@ -183,6 +196,7 @@ static int viodasd_release(struct gendisk *disk, fmode_t mode)
 	struct viodasd_device *d = disk->private_data;
 	HvLpEvent_Rc hvrc;
 
+	lock_kernel();
 	/* Send the event to OS/400.  We DON'T expect a response */
 	hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
 			HvLpEvent_Type_VirtualIo,
@@ -195,6 +209,9 @@ static int viodasd_release(struct gendisk *disk, fmode_t mode)
 			0, 0, 0);
 	if (hvrc != 0)
 		pr_warning("HV close call failed %d\n", (int)hvrc);
+
+	unlock_kernel();
+
 	return 0;
 }
 
@@ -219,7 +236,7 @@ static int viodasd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
  */
 static const struct block_device_operations viodasd_fops = {
 	.owner = THIS_MODULE,
-	.open = viodasd_open,
+	.open = viodasd_unlocked_open,
 	.release = viodasd_release,
 	.getgeo = viodasd_getgeo,
 };
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9119cd3d56a4..91374282755d 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -41,6 +41,7 @@
 #include <linux/cdrom.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/scatterlist.h>
 
 #include <xen/xen.h>
@@ -1018,13 +1019,18 @@ static int blkfront_is_ready(struct xenbus_device *dev)
 static int blkif_open(struct block_device *bdev, fmode_t mode)
 {
 	struct blkfront_info *info = bdev->bd_disk->private_data;
+
+	lock_kernel();
 	info->users++;
+	unlock_kernel();
+
 	return 0;
 }
 
 static int blkif_release(struct gendisk *disk, fmode_t mode)
 {
 	struct blkfront_info *info = disk->private_data;
+	lock_kernel();
 	info->users--;
 	if (info->users == 0) {
 		/* Check whether we have been instructed to close.  We will
@@ -1036,6 +1042,7 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 		if (state == XenbusStateClosing && info->is_ready)
 			blkfront_closing(dev);
 	}
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index ac278ac908d5..b71888b909a0 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -89,6 +89,7 @@
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/ata.h>
 #include <linux/hdreg.h>
 #include <linux/platform_device.h>
@@ -901,11 +902,14 @@ static int ace_open(struct block_device *bdev, fmode_t mode)
 
 	dev_dbg(ace->dev, "ace_open() users=%i\n", ace->users + 1);
 
+	lock_kernel();
 	spin_lock_irqsave(&ace->lock, flags);
 	ace->users++;
 	spin_unlock_irqrestore(&ace->lock, flags);
 
 	check_disk_change(bdev);
+	unlock_kernel();
+
 	return 0;
 }
 
@@ -917,6 +921,7 @@ static int ace_release(struct gendisk *disk, fmode_t mode)
 
 	dev_dbg(ace->dev, "ace_release() users=%i\n", ace->users - 1);
 
+	lock_kernel();
 	spin_lock_irqsave(&ace->lock, flags);
 	ace->users--;
 	if (ace->users == 0) {
@@ -924,6 +929,7 @@ static int ace_release(struct gendisk *disk, fmode_t mode)
 		ace_out(ace, ACE_CTRL, val & ~ACE_CTRL_LOCKREQ);
 	}
 	spin_unlock_irqrestore(&ace->lock, flags);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index 9114654b54d9..d75b2bb601ad 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -33,6 +33,7 @@
 #include <linux/module.h>
 #include <linux/blkdev.h>
 #include <linux/bitops.h>
+#include <linux/smp_lock.h>
 #include <linux/slab.h>
 
 #include <asm/setup.h>
@@ -153,6 +154,7 @@ static int z2_open(struct block_device *bdev, fmode_t mode)
 
     device = MINOR(bdev->bd_dev);
 
+    lock_kernel();
     if ( current_device != -1 && current_device != device )
     {
 	rc = -EBUSY;
@@ -294,20 +296,25 @@ static int z2_open(struct block_device *bdev, fmode_t mode)
 	set_capacity(z2ram_gendisk, z2ram_size >> 9);
     }
 
+    unlock_kernel();
     return 0;
 
 err_out_kfree:
     kfree(z2ram_map);
 err_out:
+    unlock_kernel();
     return rc;
 }
 
 static int
 z2_release(struct gendisk *disk, fmode_t mode)
 {
-    if ( current_device == -1 )
-	return 0;     
-
+    lock_kernel();
+    if ( current_device == -1 ) {
+    	unlock_kernel();
+    	return 0;
+    }
+    unlock_kernel();
     /*
      * FIXME: unmap memory
      */
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 1772fd914fb9..261107d1457c 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -493,12 +493,18 @@ static struct cdrom_device_ops gdrom_ops = {
 
 static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)
 {
-	return cdrom_open(gd.cd_info, bdev, mode);
+	int ret;
+	lock_kernel();
+	ret = cdrom_open(gd.cd_info, bdev, mode);
+	unlock_kernel();
+	return ret;
 }
 
 static int gdrom_bdops_release(struct gendisk *disk, fmode_t mode)
 {
+	lock_kernel();
 	cdrom_release(gd.cd_info, mode);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 16dada0627ee..56bf9f44700c 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -154,13 +154,21 @@ static const struct file_operations proc_viocd_operations = {
 static int viocd_blk_open(struct block_device *bdev, fmode_t mode)
 {
 	struct disk_info *di = bdev->bd_disk->private_data;
-	return cdrom_open(&di->viocd_info, bdev, mode);
+	int ret;
+
+	lock_kernel();
+	ret = cdrom_open(&di->viocd_info, bdev, mode);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int viocd_blk_release(struct gendisk *disk, fmode_t mode)
 {
 	struct disk_info *di = disk->private_data;
+	lock_kernel();
 	cdrom_release(&di->viocd_info, mode);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index bf9f61a5c2f8..5108e9739c96 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1591,17 +1591,19 @@ static struct ide_driver ide_cdrom_driver = {
 
 static int idecd_open(struct block_device *bdev, fmode_t mode)
 {
-	struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
-	int rc = -ENOMEM;
+	struct cdrom_info *info;
+	int rc = -ENXIO;
 
+	lock_kernel();
+	info = ide_cd_get(bdev->bd_disk);
 	if (!info)
-		return -ENXIO;
+		goto out;
 
 	rc = cdrom_open(&info->devinfo, bdev, mode);
-
 	if (rc < 0)
 		ide_cd_put(info);
-
+out:
+	unlock_kernel();
 	return rc;
 }
 
@@ -1609,9 +1611,11 @@ static int idecd_release(struct gendisk *disk, fmode_t mode)
 {
 	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
 
+	lock_kernel();
 	cdrom_release(&info->devinfo, mode);
 
 	ide_cd_put(info);
+	unlock_kernel();
 
 	return 0;
 }
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 883f0c979c9f..137337a795a9 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -1,3 +1,4 @@
+#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/string.h>
@@ -237,6 +238,18 @@ out_put_idkp:
 	return ret;
 }
 
+static int ide_gd_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	lock_kernel();
+	ret = ide_gd_open(bdev, mode);
+	unlock_kernel();
+
+	return ret;
+}
+
+
 static int ide_gd_release(struct gendisk *disk, fmode_t mode)
 {
 	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
@@ -244,6 +257,7 @@ static int ide_gd_release(struct gendisk *disk, fmode_t mode)
 
 	ide_debug_log(IDE_DBG_FUNC, "enter");
 
+	lock_kernel();
 	if (idkp->openers == 1)
 		drive->disk_ops->flush(drive);
 
@@ -255,6 +269,7 @@ static int ide_gd_release(struct gendisk *disk, fmode_t mode)
 	idkp->openers--;
 
 	ide_disk_put(idkp);
+	unlock_kernel();
 
 	return 0;
 }
@@ -321,7 +336,7 @@ static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
 
 static const struct block_device_operations ide_gd_ops = {
 	.owner			= THIS_MODULE,
-	.open			= ide_gd_open,
+	.open			= ide_gd_unlocked_open,
 	.release		= ide_gd_release,
 	.ioctl			= ide_gd_ioctl,
 	.getgeo			= ide_gd_getgeo,
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 39b0a5c45f07..6d622cb5ac81 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1907,7 +1907,11 @@ static const struct file_operations idetape_fops = {
 
 static int idetape_open(struct block_device *bdev, fmode_t mode)
 {
-	struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk, false, 0);
+	struct ide_tape_obj *tape;
+
+	lock_kernel();
+	tape = ide_tape_get(bdev->bd_disk, false, 0);
+	unlock_kernel();
 
 	if (!tape)
 		return -ENXIO;
@@ -1919,7 +1923,10 @@ static int idetape_release(struct gendisk *disk, fmode_t mode)
 {
 	struct ide_tape_obj *tape = ide_drv_g(disk, ide_tape_obj);
 
+	lock_kernel();
 	ide_tape_put(tape);
+	unlock_kernel();
+
 	return 0;
 }
 
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index d505a96845c1..a3f21dc02bd8 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -15,6 +15,7 @@
 #include <linux/blkpg.h>
 #include <linux/bio.h>
 #include <linux/buffer_head.h>
+#include <linux/smp_lock.h>
 #include <linux/mempool.h>
 #include <linux/slab.h>
 #include <linux/idr.h>
@@ -338,6 +339,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode)
 {
 	struct mapped_device *md;
 
+	lock_kernel();
 	spin_lock(&_minor_lock);
 
 	md = bdev->bd_disk->private_data;
@@ -355,6 +357,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode)
 
 out:
 	spin_unlock(&_minor_lock);
+	unlock_kernel();
 
 	return md ? 0 : -ENXIO;
 }
@@ -362,8 +365,12 @@ out:
 static int dm_blk_close(struct gendisk *disk, fmode_t mode)
 {
 	struct mapped_device *md = disk->private_data;
+
+	lock_kernel();
 	atomic_dec(&md->open_count);
 	dm_put(md);
+	unlock_kernel();
+
 	return 0;
 }
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1893af678779..700c96edf9b2 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -36,6 +36,7 @@
 #include <linux/blkdev.h>
 #include <linux/sysctl.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 #include <linux/buffer_head.h> /* for invalidate_bdev */
 #include <linux/poll.h>
 #include <linux/ctype.h>
@@ -5902,6 +5903,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 	mddev_t *mddev = mddev_find(bdev->bd_dev);
 	int err;
 
+	lock_kernel();
 	if (mddev->gendisk != bdev->bd_disk) {
 		/* we are racing with mddev_put which is discarding this
 		 * bd_disk.
@@ -5910,6 +5912,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 		/* Wait until bdev->bd_disk is definitely gone */
 		flush_scheduled_work();
 		/* Then retry the open from the top */
+		unlock_kernel();
 		return -ERESTARTSYS;
 	}
 	BUG_ON(mddev != bdev->bd_disk->private_data);
@@ -5923,6 +5926,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 
 	check_disk_size_change(mddev->gendisk, bdev);
  out:
+	unlock_kernel();
 	return err;
 }
 
@@ -5931,8 +5935,10 @@ static int md_release(struct gendisk *disk, fmode_t mode)
  	mddev_t *mddev = disk->private_data;
 
 	BUG_ON(!mddev);
+	lock_kernel();
 	atomic_dec(&mddev->openers);
 	mddev_put(mddev);
+	unlock_kernel();
 
 	return 0;
 }
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 56645408d225..eef78a068fd1 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -18,6 +18,7 @@
 #include <linux/kthread.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/memstick.h>
 
 #define DRIVER_NAME "mspro_block"
@@ -179,6 +180,7 @@ static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
 	struct mspro_block_data *msb = disk->private_data;
 	int rc = -ENXIO;
 
+	lock_kernel();
 	mutex_lock(&mspro_block_disk_lock);
 
 	if (msb && msb->card) {
@@ -190,6 +192,7 @@ static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
 	}
 
 	mutex_unlock(&mspro_block_disk_lock);
+	unlock_kernel();
 
 	return rc;
 }
@@ -221,7 +224,11 @@ static int mspro_block_disk_release(struct gendisk *disk)
 
 static int mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
 {
-	return mspro_block_disk_release(disk);
+	int ret;
+	lock_kernel();
+	ret = mspro_block_disk_release(disk);
+	unlock_kernel();
+	return ret;
 }
 
 static int mspro_block_bd_getgeo(struct block_device *bdev,
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index d1bdf8abe5db..a5bc3ee0d93e 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -53,6 +53,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2o.h>
+#include <linux/smp_lock.h>
 
 #include <linux/mempool.h>
 
@@ -577,6 +578,7 @@ static int i2o_block_open(struct block_device *bdev, fmode_t mode)
 	if (!dev->i2o_dev)
 		return -ENODEV;
 
+	lock_kernel();
 	if (dev->power > 0x1f)
 		i2o_block_device_power(dev, 0x02);
 
@@ -585,6 +587,7 @@ static int i2o_block_open(struct block_device *bdev, fmode_t mode)
 	i2o_block_device_lock(dev->i2o_dev, -1);
 
 	osm_debug("Ready.\n");
+	unlock_kernel();
 
 	return 0;
 };
@@ -615,6 +618,7 @@ static int i2o_block_release(struct gendisk *disk, fmode_t mode)
 	if (!dev->i2o_dev)
 		return 0;
 
+	lock_kernel();
 	i2o_block_device_flush(dev->i2o_dev);
 
 	i2o_block_device_unlock(dev->i2o_dev, -1);
@@ -625,6 +629,7 @@ static int i2o_block_release(struct gendisk *disk, fmode_t mode)
 		operation = 0x24;
 
 	i2o_block_device_power(dev, operation);
+	unlock_kernel();
 
 	return 0;
 }
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index cb9fbc83b090..8433cde29c8b 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -29,6 +29,7 @@
 #include <linux/kdev_t.h>
 #include <linux/blkdev.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <linux/scatterlist.h>
 #include <linux/string_helpers.h>
 
@@ -107,6 +108,7 @@ static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
 	struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
 	int ret = -ENXIO;
 
+	lock_kernel();
 	if (md) {
 		if (md->usage == 2)
 			check_disk_change(bdev);
@@ -117,6 +119,7 @@ static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
 			ret = -EROFS;
 		}
 	}
+	unlock_kernel();
 
 	return ret;
 }
@@ -125,7 +128,9 @@ static int mmc_blk_release(struct gendisk *disk, fmode_t mode)
 {
 	struct mmc_blk_data *md = disk->private_data;
 
+	lock_kernel();
 	mmc_blk_put(md);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 8c83b11a77d5..5ca80aee2ed0 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -165,8 +165,9 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
 	int ret;
 
 	if (!dev)
-		return -ERESTARTSYS;
+		return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/
 
+	lock_kernel();
 	mutex_lock(&dev->lock);
 
 	if (!dev->mtd) {
@@ -183,6 +184,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
 unlock:
 	mutex_unlock(&dev->lock);
 	blktrans_dev_put(dev);
+	unlock_kernel();
 	return ret;
 }
 
@@ -194,6 +196,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
 	if (!dev)
 		return ret;
 
+	lock_kernel();
 	mutex_lock(&dev->lock);
 
 	/* Release one reference, we sure its not the last one here*/
@@ -206,6 +209,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
 unlock:
 	mutex_unlock(&dev->lock);
 	blktrans_dev_put(dev);
+	unlock_kernel();
 	return ret;
 }
 
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 17b033d0e050..1a84fae155e1 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -21,6 +21,7 @@
 #include <linux/hdreg.h>
 #include <linux/async.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
@@ -2235,6 +2236,7 @@ static int dasd_open(struct block_device *bdev, fmode_t mode)
 	if (!block)
 		return -ENODEV;
 
+	lock_kernel();
 	base = block->base;
 	atomic_inc(&block->open_count);
 	if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) {
@@ -2269,12 +2271,14 @@ static int dasd_open(struct block_device *bdev, fmode_t mode)
 		goto out;
 	}
 
+	unlock_kernel();
 	return 0;
 
 out:
 	module_put(base->discipline->owner);
 unlock:
 	atomic_dec(&block->open_count);
+	unlock_kernel();
 	return rc;
 }
 
@@ -2282,8 +2286,10 @@ static int dasd_release(struct gendisk *disk, fmode_t mode)
 {
 	struct dasd_block *block = disk->private_data;
 
+	lock_kernel();
 	atomic_dec(&block->open_count);
 	module_put(block->base->discipline->owner);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 9b43ae94beba..2bd72aa34c59 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/completion.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
@@ -775,6 +776,7 @@ dcssblk_open(struct block_device *bdev, fmode_t mode)
 	struct dcssblk_dev_info *dev_info;
 	int rc;
 
+	lock_kernel();
 	dev_info = bdev->bd_disk->private_data;
 	if (NULL == dev_info) {
 		rc = -ENODEV;
@@ -784,6 +786,7 @@ dcssblk_open(struct block_device *bdev, fmode_t mode)
 	bdev->bd_block_size = 4096;
 	rc = 0;
 out:
+	unlock_kernel();
 	return rc;
 }
 
@@ -794,6 +797,7 @@ dcssblk_release(struct gendisk *disk, fmode_t mode)
 	struct segment_info *entry;
 	int rc;
 
+	lock_kernel();
 	if (!dev_info) {
 		rc = -ENODEV;
 		goto out;
@@ -811,6 +815,7 @@ dcssblk_release(struct gendisk *disk, fmode_t mode)
 	up_write(&dcssblk_devices_sem);
 	rc = 0;
 out:
+	unlock_kernel();
 	return rc;
 }
 
diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index 097da8ce6be6..b7de02525ec9 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -16,6 +16,7 @@
 #include <linux/fs.h>
 #include <linux/module.h>
 #include <linux/blkdev.h>
+#include <linux/smp_lock.h>
 #include <linux/interrupt.h>
 #include <linux/buffer_head.h>
 #include <linux/kernel.h>
@@ -361,6 +362,7 @@ tapeblock_open(struct block_device *bdev, fmode_t mode)
 	struct tape_device *	device;
 	int			rc;
 
+	lock_kernel();
 	device = tape_get_device(disk->private_data);
 
 	if (device->required_tapemarks) {
@@ -384,12 +386,14 @@ tapeblock_open(struct block_device *bdev, fmode_t mode)
 	 *       is called.
 	 */
 	tape_state_set(device, TS_BLKUSE);
+	unlock_kernel();
 	return 0;
 
 release:
 	tape_release(device);
  put_device:
 	tape_put_device(device);
+	unlock_kernel();
 	return rc;
 }
 
@@ -403,10 +407,12 @@ static int
 tapeblock_release(struct gendisk *disk, fmode_t mode)
 {
 	struct tape_device *device = disk->private_data;
-
+ 
+	lock_kernel();
 	tape_state_set(device, TS_IN_USE);
 	tape_release(device);
 	tape_put_device(device);
+	unlock_kernel();
 
 	return 0;
 }
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 633ac32b25c1..01680c7c8507 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -795,6 +795,7 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 
 	SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
 
+	lock_kernel();
 	sdev = sdkp->device;
 
 	/*
@@ -838,10 +839,12 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 			scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
 	}
 
+	unlock_kernel();
 	return 0;
 
 error_out:
 	scsi_disk_put(sdkp);
+	unlock_kernel();
 	return retval;	
 }
 
@@ -863,6 +866,7 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
 
 	SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
 
+	lock_kernel();
 	if (!--sdkp->openers && sdev->removable) {
 		if (scsi_block_when_processing_errors(sdev))
 			scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
@@ -873,6 +877,7 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
 	 * XXX is followed by a "rmmod sd_mod"?
 	 */
 	scsi_disk_put(sdkp);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index d42fa6468f41..ba9c3e0387ce 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -467,22 +467,27 @@ static int sr_prep_fn(struct request_queue *q, struct request *rq)
 
 static int sr_block_open(struct block_device *bdev, fmode_t mode)
 {
-	struct scsi_cd *cd = scsi_cd_get(bdev->bd_disk);
+	struct scsi_cd *cd;
 	int ret = -ENXIO;
 
+	lock_kernel();
+	cd = scsi_cd_get(bdev->bd_disk);
 	if (cd) {
 		ret = cdrom_open(&cd->cdi, bdev, mode);
 		if (ret)
 			scsi_cd_put(cd);
 	}
+	unlock_kernel();
 	return ret;
 }
 
 static int sr_block_release(struct gendisk *disk, fmode_t mode)
 {
 	struct scsi_cd *cd = scsi_cd(disk);
+	lock_kernel();
 	cdrom_release(&cd->cdi, mode);
 	scsi_cd_put(cd);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/staging/hv/blkvsc_drv.c b/drivers/staging/hv/blkvsc_drv.c
index a9aff90e58e0..87a11c9293e9 100644
--- a/drivers/staging/hv/blkvsc_drv.c
+++ b/drivers/staging/hv/blkvsc_drv.c
@@ -25,6 +25,7 @@
 #include <linux/major.h>
 #include <linux/delay.h>
 #include <linux/hdreg.h>
+#include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -1326,6 +1327,7 @@ static int blkvsc_open(struct block_device *bdev, fmode_t mode)
 	DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users,
 		   blkdev->gd->disk_name);
 
+	lock_kernel();
 	spin_lock(&blkdev->lock);
 
 	if (!blkdev->users && blkdev->device_type == DVD_TYPE) {
@@ -1337,6 +1339,7 @@ static int blkvsc_open(struct block_device *bdev, fmode_t mode)
 	blkdev->users++;
 
 	spin_unlock(&blkdev->lock);
+	unlock_kernel();
 	return 0;
 }
 
@@ -1347,6 +1350,7 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode)
 	DPRINT_DBG(BLKVSC_DRV, "- users %d disk %s\n", blkdev->users,
 		   blkdev->gd->disk_name);
 
+	lock_kernel();
 	spin_lock(&blkdev->lock);
 	if (blkdev->users == 1) {
 		spin_unlock(&blkdev->lock);
@@ -1357,6 +1361,7 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode)
 	blkdev->users--;
 
 	spin_unlock(&blkdev->lock);
+	unlock_kernel();
 	return 0;
 }
 
-- 
cgit v1.2.3


From 409f3499a2cfcd1e9c2857c53af7fcce069f027f Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 7 Jul 2010 16:51:29 +0200
Subject: scsi/sd: remove big kernel lock

Every user of the BKL in the sd driver is the
result of the pushdown from the block layer
into the open/close/ioctl functions.

The only place that used to rely on the BKL is
the sdkp->openers variable, which gets converted
into an atomic_t.

Nothing else seems to rely on the BKL, since the
functions do not touch global data without holding
another lock, and the open/close functions are
still protected from concurrent execution using
the bdev->bd_mutex.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-scsi@vger.kernel.org
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 17 +++++++----------
 drivers/scsi/sd.h |  2 +-
 2 files changed, 8 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 01680c7c8507..fc5d69a84af5 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -783,6 +783,8 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
  *	or from within the kernel (e.g. as a result of a mount(1) ).
  *	In the latter case @inode and @filp carry an abridged amount
  *	of information as noted above.
+ *
+ *	Locking: called with bdev->bd_mutex held.
  **/
 static int sd_open(struct block_device *bdev, fmode_t mode)
 {
@@ -795,7 +797,6 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 
 	SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
 
-	lock_kernel();
 	sdev = sdkp->device;
 
 	/*
@@ -834,17 +835,15 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 	if (!scsi_device_online(sdev))
 		goto error_out;
 
-	if (!sdkp->openers++ && sdev->removable) {
+	if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
 		if (scsi_block_when_processing_errors(sdev))
 			scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
 	}
 
-	unlock_kernel();
 	return 0;
 
 error_out:
 	scsi_disk_put(sdkp);
-	unlock_kernel();
 	return retval;	
 }
 
@@ -858,6 +857,8 @@ error_out:
  *
  *	Note: may block (uninterruptible) if error recovery is underway
  *	on this disk.
+ *
+ *	Locking: called with bdev->bd_mutex held.
  **/
 static int sd_release(struct gendisk *disk, fmode_t mode)
 {
@@ -866,8 +867,7 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
 
 	SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
 
-	lock_kernel();
-	if (!--sdkp->openers && sdev->removable) {
+	if (atomic_dec_return(&sdkp->openers) && sdev->removable) {
 		if (scsi_block_when_processing_errors(sdev))
 			scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
 	}
@@ -877,7 +877,6 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
 	 * XXX is followed by a "rmmod sd_mod"?
 	 */
 	scsi_disk_put(sdkp);
-	unlock_kernel();
 	return 0;
 }
 
@@ -930,7 +929,6 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n",
 						disk->disk_name, cmd));
 
-	lock_kernel();
 	/*
 	 * If we are in the middle of error recovery, don't let anyone
 	 * else try and use this device.  Also, if error recovery fails, it
@@ -960,7 +958,6 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 			break;
 	}
 out:
-	unlock_kernel();
 	return error;
 }
 
@@ -2346,7 +2343,7 @@ static int sd_probe(struct device *dev)
 	sdkp->driver = &sd_template;
 	sdkp->disk = gd;
 	sdkp->index = index;
-	sdkp->openers = 0;
+	atomic_set(&sdkp->openers, 0);
 	sdkp->previous_state = 1;
 
 	if (!sdp->request_queue->rq_timeout) {
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 43d3caf268ef..f81a9309e6de 100644
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -47,7 +47,7 @@ struct scsi_disk {
 	struct scsi_device *device;
 	struct device	dev;
 	struct gendisk	*disk;
-	unsigned int	openers;	/* protected by BKL for now, yuck */
+	atomic_t	openers;
 	sector_t	capacity;	/* size in 512-byte sectors */
 	u32		index;
 	unsigned short	hw_sector_size;
-- 
cgit v1.2.3


From 2daa672b1a736d41b3e7a2e3a05f1909a1f96530 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 8 Jul 2010 14:57:03 +0200
Subject: scsi/i2o: restore ioctl changes

This restores the changes from "scsi/i2o_block: cleanup ioctl
handling", which accidentally got reverted.

Origignal changelog:
      This fixes the ioctl function of the i2o_block driver, which
      has multiple problems:

      * The BLKI2OSRSTRAT and BLKI2OSWSTRAT commands always return
        -ENOTTY on success, where they should return 0.
      * Support for 32 bit compat is missing
      * The driver should use the .ioctl function and because
        .locked_ioctl is going away.

      The use of the big kernel lock remains for now, but gets
      made explictit in the ioctl function.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/message/i2o/i2o_block.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index a5bc3ee0d93e..e6733bc99724 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -657,30 +657,40 @@ static int i2o_block_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	struct gendisk *disk = bdev->bd_disk;
 	struct i2o_block_device *dev = disk->private_data;
+	int ret = -ENOTTY;
 
 	/* Anyone capable of this syscall can do *real bad* things */
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
+	lock_kernel();
 	switch (cmd) {
 	case BLKI2OGRSTRAT:
-		return put_user(dev->rcache, (int __user *)arg);
+		ret = put_user(dev->rcache, (int __user *)arg);
+		break;
 	case BLKI2OGWSTRAT:
-		return put_user(dev->wcache, (int __user *)arg);
+		ret = put_user(dev->wcache, (int __user *)arg);
+		break;
 	case BLKI2OSRSTRAT:
+		ret = -EINVAL;
 		if (arg < 0 || arg > CACHE_SMARTFETCH)
-			return -EINVAL;
+			break;
 		dev->rcache = arg;
+		ret = 0;
 		break;
 	case BLKI2OSWSTRAT:
+		ret = -EINVAL;
 		if (arg != 0
 		    && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK))
-			return -EINVAL;
+			break;
 		dev->wcache = arg;
+		ret = 0;
 		break;
 	}
-	return -ENOTTY;
+	unlock_kernel();
+
+	return ret;
 };
 
 /**
@@ -936,6 +946,7 @@ static const struct block_device_operations i2o_block_fops = {
 	.open = i2o_block_open,
 	.release = i2o_block_release,
 	.ioctl = i2o_block_ioctl,
+	.compat_ioctl = i2o_block_ioctl,
 	.getgeo = i2o_block_getgeo,
 	.media_changed = i2o_block_media_changed
 };
-- 
cgit v1.2.3


From 203fd61f42fec81f43bc5abbf2d3755e04e000af Mon Sep 17 00:00:00 2001
From: Ian Campbell <ian.campbell@citrix.com>
Date: Fri, 4 Dec 2009 15:33:54 +0000
Subject: xen: use less generic names in blkfront driver.

All Xen frontend drivers have a couple of identically named functions which
makes figuring out which device went wrong from a stacktrace harder than it
needs to be. Rename them to something specificto the device type.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 91374282755d..304009e77c73 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -651,7 +651,7 @@ fail:
 
 
 /* Common code used when first setting up, and when resuming. */
-static int talk_to_backend(struct xenbus_device *dev,
+static int talk_to_blkback(struct xenbus_device *dev,
 			   struct blkfront_info *info)
 {
 	const char *message = NULL;
@@ -756,7 +756,7 @@ static int blkfront_probe(struct xenbus_device *dev,
 	info->handle = simple_strtoul(strrchr(dev->nodename, '/')+1, NULL, 0);
 	dev_set_drvdata(&dev->dev, info);
 
-	err = talk_to_backend(dev, info);
+	err = talk_to_blkback(dev, info);
 	if (err) {
 		kfree(info);
 		dev_set_drvdata(&dev->dev, NULL);
@@ -851,7 +851,7 @@ static int blkfront_resume(struct xenbus_device *dev)
 
 	blkif_free(info, info->connected == BLKIF_STATE_CONNECTED);
 
-	err = talk_to_backend(dev, info);
+	err = talk_to_blkback(dev, info);
 	if (info->connected == BLKIF_STATE_SUSPENDED && !err)
 		err = blkif_recover(info);
 
@@ -955,13 +955,13 @@ static void blkfront_closing(struct xenbus_device *dev)
 /**
  * Callback received when the backend's state changes.
  */
-static void backend_changed(struct xenbus_device *dev,
+static void blkback_changed(struct xenbus_device *dev,
 			    enum xenbus_state backend_state)
 {
 	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
 	struct block_device *bd;
 
-	dev_dbg(&dev->dev, "blkfront:backend_changed.\n");
+	dev_dbg(&dev->dev, "blkfront:blkback_changed to state %d.\n", backend_state);
 
 	switch (backend_state) {
 	case XenbusStateInitialising:
@@ -1068,7 +1068,7 @@ static struct xenbus_driver blkfront = {
 	.probe = blkfront_probe,
 	.remove = blkfront_remove,
 	.resume = blkfront_resume,
-	.otherend_changed = backend_changed,
+	.otherend_changed = blkback_changed,
 	.is_ready = blkfront_is_ready,
 };
 
-- 
cgit v1.2.3


From 0e34582699392d67910bd3919bc8fd9bedce115e Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@novell.com>
Date: Sat, 7 Aug 2010 18:28:55 +0200
Subject: blkfront: fixes for 'xm block-detach ... --force'

Prevent prematurely freeing 'struct blkfront_info' instances (when the
xenbus data structures are gone, but the Linux ones are still needed).

Prevent adding a disk with the same (major, minor) [and hence the same
name and sysfs entries, which leads to oopses] when the previous
instance wasn't fully de-allocated yet.

This still doesn't address all issues resulting from forced detach:
I/O submitted after the detach still blocks forever, likely preventing
subsequent un-mounting from completing. It's not clear to me (not
knowing much about the block layer) how this can be avoided.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 88 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 81 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 304009e77c73..22091e4e401f 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -105,6 +105,10 @@ struct blkfront_info
 
 static DEFINE_SPINLOCK(blkif_io_lock);
 
+static unsigned int nr_minors;
+static unsigned long *minors;
+static DEFINE_SPINLOCK(minor_lock);
+
 #define MAXIMUM_OUTSTANDING_BLOCK_REQS \
 	(BLKIF_MAX_SEGMENTS_PER_REQUEST * BLK_RING_SIZE)
 #define GRANT_INVALID_REF	0
@@ -139,6 +143,55 @@ static void add_id_to_freelist(struct blkfront_info *info,
 	info->shadow_free = id;
 }
 
+static int xlbd_reserve_minors(unsigned int minor, unsigned int nr)
+{
+	unsigned int end = minor + nr;
+	int rc;
+
+	if (end > nr_minors) {
+		unsigned long *bitmap, *old;
+
+		bitmap = kzalloc(BITS_TO_LONGS(end) * sizeof(*bitmap),
+				 GFP_KERNEL);
+		if (bitmap == NULL)
+			return -ENOMEM;
+
+		spin_lock(&minor_lock);
+		if (end > nr_minors) {
+			old = minors;
+			memcpy(bitmap, minors,
+			       BITS_TO_LONGS(nr_minors) * sizeof(*bitmap));
+			minors = bitmap;
+			nr_minors = BITS_TO_LONGS(end) * BITS_PER_LONG;
+		} else
+			old = bitmap;
+		spin_unlock(&minor_lock);
+		kfree(old);
+	}
+
+	spin_lock(&minor_lock);
+	if (find_next_bit(minors, end, minor) >= end) {
+		for (; minor < end; ++minor)
+			__set_bit(minor, minors);
+		rc = 0;
+	} else
+		rc = -EBUSY;
+	spin_unlock(&minor_lock);
+
+	return rc;
+}
+
+static void xlbd_release_minors(unsigned int minor, unsigned int nr)
+{
+	unsigned int end = minor + nr;
+
+	BUG_ON(end > nr_minors);
+	spin_lock(&minor_lock);
+	for (; minor < end; ++minor)
+		__clear_bit(minor, minors);
+	spin_unlock(&minor_lock);
+}
+
 static void blkif_restart_queue_callback(void *arg)
 {
 	struct blkfront_info *info = (struct blkfront_info *)arg;
@@ -417,9 +470,14 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
 	if ((minor % nr_parts) == 0)
 		nr_minors = nr_parts;
 
+	err = xlbd_reserve_minors(minor, nr_minors);
+	if (err)
+		goto out;
+	err = -ENODEV;
+
 	gd = alloc_disk(nr_minors);
 	if (gd == NULL)
-		goto out;
+		goto release;
 
 	offset = minor / nr_parts;
 
@@ -450,7 +508,7 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
 
 	if (xlvbd_init_blk_queue(gd, sector_size)) {
 		del_gendisk(gd);
-		goto out;
+		goto release;
 	}
 
 	info->rq = gd->queue;
@@ -470,6 +528,8 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
 
 	return 0;
 
+ release:
+	xlbd_release_minors(minor, nr_minors);
  out:
 	return err;
 }
@@ -924,6 +984,7 @@ static void blkfront_connect(struct blkfront_info *info)
 static void blkfront_closing(struct xenbus_device *dev)
 {
 	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
+	unsigned int minor, nr_minors;
 	unsigned long flags;
 
 	dev_dbg(&dev->dev, "blkfront_closing: %s removed\n", dev->nodename);
@@ -946,7 +1007,10 @@ static void blkfront_closing(struct xenbus_device *dev)
 	blk_cleanup_queue(info->rq);
 	info->rq = NULL;
 
+	minor = info->gd->first_minor;
+	nr_minors = info->gd->minors;
 	del_gendisk(info->gd);
+	xlbd_release_minors(minor, nr_minors);
 
  out:
 	xenbus_frontend_closed(dev);
@@ -1004,7 +1068,10 @@ static int blkfront_remove(struct xenbus_device *dev)
 
 	blkif_free(info, 0);
 
-	kfree(info);
+	if(info->users == 0)
+		kfree(info);
+	else
+		info->is_ready = -1;
 
 	return 0;
 }
@@ -1013,18 +1080,22 @@ static int blkfront_is_ready(struct xenbus_device *dev)
 {
 	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
 
-	return info->is_ready;
+	return info->is_ready > 0;
 }
 
 static int blkif_open(struct block_device *bdev, fmode_t mode)
 {
 	struct blkfront_info *info = bdev->bd_disk->private_data;
+	int ret = 0;
 
 	lock_kernel();
-	info->users++;
+	if (info->is_ready < 0)
+		ret = -ENODEV;
+	else
+		info->users++;
 	unlock_kernel();
 
-	return 0;
+	return ret;
 }
 
 static int blkif_release(struct gendisk *disk, fmode_t mode)
@@ -1039,7 +1110,10 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 		struct xenbus_device *dev = info->xbdev;
 		enum xenbus_state state = xenbus_read_driver_state(dev->otherend);
 
-		if (state == XenbusStateClosing && info->is_ready)
+		if(info->is_ready < 0) {
+			blkfront_closing(dev);
+			kfree(info);
+		} else if (state == XenbusStateClosing && info->is_ready)
 			blkfront_closing(dev);
 	}
 	unlock_kernel();
-- 
cgit v1.2.3


From 5d7ed20e822ef82117a4d9928b030fa0247b789d Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@novell.com>
Date: Sat, 7 Aug 2010 18:31:12 +0200
Subject: blkfront: don't access freed struct xenbus_device

Unfortunately commit "blkfront: fixes for 'xm block-detach ... --force'"
still wasn't quite right - there was a reference to freed memory left
from blkfront_closing().

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 22091e4e401f..60006b730872 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -981,13 +981,11 @@ static void blkfront_connect(struct blkfront_info *info)
  * the backend.  Once is this done, we can switch to Closed in
  * acknowledgement.
  */
-static void blkfront_closing(struct xenbus_device *dev)
+static void blkfront_closing(struct blkfront_info *info)
 {
-	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
 	unsigned int minor, nr_minors;
 	unsigned long flags;
 
-	dev_dbg(&dev->dev, "blkfront_closing: %s removed\n", dev->nodename);
 
 	if (info->rq == NULL)
 		goto out;
@@ -1013,7 +1011,8 @@ static void blkfront_closing(struct xenbus_device *dev)
 	xlbd_release_minors(minor, nr_minors);
 
  out:
-	xenbus_frontend_closed(dev);
+	if (info->xbdev)
+		xenbus_frontend_closed(info->xbdev);
 }
 
 /**
@@ -1053,7 +1052,7 @@ static void blkback_changed(struct xenbus_device *dev,
 			xenbus_dev_error(dev, -EBUSY,
 					 "Device in use; refusing to close");
 		else
-			blkfront_closing(dev);
+			blkfront_closing(info);
 		mutex_unlock(&bd->bd_mutex);
 		bdput(bd);
 		break;
@@ -1071,7 +1070,7 @@ static int blkfront_remove(struct xenbus_device *dev)
 	if(info->users == 0)
 		kfree(info);
 	else
-		info->is_ready = -1;
+		info->xbdev = NULL;
 
 	return 0;
 }
@@ -1080,22 +1079,21 @@ static int blkfront_is_ready(struct xenbus_device *dev)
 {
 	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
 
-	return info->is_ready > 0;
+	return info->is_ready && info->xbdev;
 }
 
 static int blkif_open(struct block_device *bdev, fmode_t mode)
 {
 	struct blkfront_info *info = bdev->bd_disk->private_data;
-	int ret = 0;
+
+	if (!info->xbdev)
+		return -ENODEV;
 
 	lock_kernel();
-	if (info->is_ready < 0)
-		ret = -ENODEV;
-	else
-		info->users++;
+	info->users++;
 	unlock_kernel();
 
-	return ret;
+	return 0;
 }
 
 static int blkif_release(struct gendisk *disk, fmode_t mode)
@@ -1108,13 +1106,13 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 		   have ignored this request initially, as the device was
 		   still mounted. */
 		struct xenbus_device *dev = info->xbdev;
-		enum xenbus_state state = xenbus_read_driver_state(dev->otherend);
 
-		if(info->is_ready < 0) {
-			blkfront_closing(dev);
+		if (!dev) {
+			blkfront_closing(info);
 			kfree(info);
-		} else if (state == XenbusStateClosing && info->is_ready)
-			blkfront_closing(dev);
+		} else if (xenbus_read_driver_state(dev->otherend)
+			   == XenbusStateClosing && info->is_ready)
+			blkfront_closing(info);
 	}
 	unlock_kernel();
 	return 0;
-- 
cgit v1.2.3


From 1fa73be6be65028a7543bba8f14474b42e064a1b Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <ksrinivasan@novell.com>
Date: Thu, 11 Mar 2010 13:42:26 -0800
Subject: xen/front: Propagate changed size of VBDs

Support dynamic resizing of virtual block devices. This patch supports
both file backed block devices as well as physical devices that can be
dynamically resized on the host side.

Signed-off-by: K. Y. Srinivasan <ksrinivasan@novell.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 60006b730872..f47b0961fab1 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -930,9 +930,24 @@ static void blkfront_connect(struct blkfront_info *info)
 	unsigned int binfo;
 	int err;
 
-	if ((info->connected == BLKIF_STATE_CONNECTED) ||
-	    (info->connected == BLKIF_STATE_SUSPENDED) )
+	switch (info->connected) {
+	case BLKIF_STATE_CONNECTED:
+		/*
+		 * Potentially, the back-end may be signalling
+		 * a capacity change; update the capacity.
+		 */
+		err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
+				   "sectors", "%Lu", &sectors);
+		if (XENBUS_EXIST_ERR(err))
+			return;
+		printk(KERN_INFO "Setting capacity to %Lu\n",
+		       sectors);
+		set_capacity(info->gd, sectors);
+
+		/* fall through */
+	case BLKIF_STATE_SUSPENDED:
 		return;
+	}
 
 	dev_dbg(&info->xbdev->dev, "%s:%s.\n",
 		__func__, info->xbdev->otherend);
-- 
cgit v1.2.3


From b4dddb498c0feaff413b2a79c64e910021983775 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Thu, 11 Mar 2010 15:10:40 -0800
Subject: xen/blkfront: avoid compiler warning from missing cases
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix:
drivers/block/xen-blkfront.c: In function ‘blkfront_connect’:
drivers/block/xen-blkfront.c:933: warning: enumeration value ‘BLKIF_STATE_DISCONNECTED’ not handled in switch

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index f47b0961fab1..9b440221755d 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -947,6 +947,9 @@ static void blkfront_connect(struct blkfront_info *info)
 		/* fall through */
 	case BLKIF_STATE_SUSPENDED:
 		return;
+
+	default:
+		break;
 	}
 
 	dev_dbg(&info->xbdev->dev, "%s:%s.\n",
-- 
cgit v1.2.3


From 2def141e71d54eccac98dc2c2ba71a82c91b324e Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <ksrinivasan@novell.com>
Date: Thu, 18 Mar 2010 15:00:54 -0700
Subject: xen/blkfront: revalidate after setting capacity

Signed-off-by: K. Y. Srinivasan <ksrinivasan@novell.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9b440221755d..7fa2a1db51e6 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -943,6 +943,7 @@ static void blkfront_connect(struct blkfront_info *info)
 		printk(KERN_INFO "Setting capacity to %Lu\n",
 		       sectors);
 		set_capacity(info->gd, sectors);
+		revalidate_disk(info->gd);
 
 		/* fall through */
 	case BLKIF_STATE_SUSPENDED:
-- 
cgit v1.2.3


From 5b61cb90c2ad8c853b4dd53eec200bacd2f02172 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:15 +0000
Subject: xenbus: Make xenbus_switch_state transactional

According to the comments, this was how it's been done years ago, but
apparently took an xbt pointer from elsewhere back then. The code was
removed because of consistency issues: cancellation wont't roll back
the saved xbdev->state.

Still, unsolicited writes to the state field remain an issue,
especially if device shutdown takes thread synchronization, and subtle
races cause accidental recreation of the device node.

Fixed by reintroducing the transaction. An internal one is sufficient,
so the xbdev->state value remains consistent.

Also fixes the original hack to prevent infinite recursion. Instead of
bailing out on the first attempt to switch to Closing, checks call
depth now.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/xen/xenbus/xenbus_client.c | 90 ++++++++++++++++++++++++++++----------
 1 file changed, 66 insertions(+), 24 deletions(-)

(limited to 'drivers')

diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 7b3e973a1aee..7e49527189b6 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -133,17 +133,12 @@ int xenbus_watch_pathfmt(struct xenbus_device *dev,
 }
 EXPORT_SYMBOL_GPL(xenbus_watch_pathfmt);
 
+static void xenbus_switch_fatal(struct xenbus_device *, int, int,
+				const char *, ...);
 
-/**
- * xenbus_switch_state
- * @dev: xenbus device
- * @state: new state
- *
- * Advertise in the store a change of the given driver to the given new_state.
- * Return 0 on success, or -errno on error.  On error, the device will switch
- * to XenbusStateClosing, and the error will be saved in the store.
- */
-int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state state)
+static int
+__xenbus_switch_state(struct xenbus_device *dev,
+		      enum xenbus_state state, int depth)
 {
 	/* We check whether the state is currently set to the given value, and
 	   if not, then the state is set.  We don't want to unconditionally
@@ -152,35 +147,65 @@ int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state state)
 	   to it, as the device will be tearing down, and we don't want to
 	   resurrect that directory.
 
-	   Note that, because of this cached value of our state, this function
-	   will not work inside a Xenstore transaction (something it was
-	   trying to in the past) because dev->state would not get reset if
-	   the transaction was aborted.
-
+	   Note that, because of this cached value of our state, this
+	   function will not take a caller's Xenstore transaction
+	   (something it was trying to in the past) because dev->state
+	   would not get reset if the transaction was aborted.
 	 */
 
+	struct xenbus_transaction xbt;
 	int current_state;
-	int err;
+	int err, abort;
 
 	if (state == dev->state)
 		return 0;
 
-	err = xenbus_scanf(XBT_NIL, dev->nodename, "state", "%d",
-			   &current_state);
-	if (err != 1)
+again:
+	abort = 1;
+
+	err = xenbus_transaction_start(&xbt);
+	if (err) {
+		xenbus_switch_fatal(dev, depth, err, "starting transaction");
 		return 0;
+	}
+
+	err = xenbus_scanf(xbt, dev->nodename, "state", "%d", &current_state);
+	if (err != 1)
+		goto abort;
 
-	err = xenbus_printf(XBT_NIL, dev->nodename, "state", "%d", state);
+	err = xenbus_printf(xbt, dev->nodename, "state", "%d", state);
 	if (err) {
-		if (state != XenbusStateClosing) /* Avoid looping */
-			xenbus_dev_fatal(dev, err, "writing new state");
-		return err;
+		xenbus_switch_fatal(dev, depth, err, "writing new state");
+		goto abort;
 	}
 
-	dev->state = state;
+	abort = 0;
+abort:
+	err = xenbus_transaction_end(xbt, abort);
+	if (err) {
+		if (err == -EAGAIN && !abort)
+			goto again;
+		xenbus_switch_fatal(dev, depth, err, "ending transaction");
+	} else
+		dev->state = state;
 
 	return 0;
 }
+
+/**
+ * xenbus_switch_state
+ * @dev: xenbus device
+ * @state: new state
+ *
+ * Advertise in the store a change of the given driver to the given new_state.
+ * Return 0 on success, or -errno on error.  On error, the device will switch
+ * to XenbusStateClosing, and the error will be saved in the store.
+ */
+int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state state)
+{
+	return __xenbus_switch_state(dev, state, 0);
+}
+
 EXPORT_SYMBOL_GPL(xenbus_switch_state);
 
 int xenbus_frontend_closed(struct xenbus_device *dev)
@@ -283,6 +308,23 @@ void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt, ...)
 }
 EXPORT_SYMBOL_GPL(xenbus_dev_fatal);
 
+/**
+ * Equivalent to xenbus_dev_fatal(dev, err, fmt, args), but helps
+ * avoiding recursion within xenbus_switch_state.
+ */
+static void xenbus_switch_fatal(struct xenbus_device *dev, int depth, int err,
+				const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	xenbus_va_dev_error(dev, err, fmt, ap);
+	va_end(ap);
+
+	if (!depth)
+		__xenbus_switch_state(dev, XenbusStateClosing, 1);
+}
+
 /**
  * xenbus_grant_ring
  * @dev: xenbus device
-- 
cgit v1.2.3


From 89de1669ace055b56f1de1c9f5aca26dd7f17f25 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:16 +0000
Subject: blkfront: Fix backtrace in del_gendisk

The call to del_gendisk follows an non-refcounted gd->queue
pointer. We release the last ref in blk_cleanup_queue. Fixed by
reordering releases accordingly.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 7fa2a1db51e6..3258ae67ac7a 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1021,14 +1021,14 @@ static void blkfront_closing(struct blkfront_info *info)
 	/* Flush gnttab callback work. Must be done with no locks held. */
 	flush_scheduled_work();
 
-	blk_cleanup_queue(info->rq);
-	info->rq = NULL;
-
 	minor = info->gd->first_minor;
 	nr_minors = info->gd->minors;
 	del_gendisk(info->gd);
 	xlbd_release_minors(minor, nr_minors);
 
+	blk_cleanup_queue(info->rq);
+	info->rq = NULL;
+
  out:
 	if (info->xbdev)
 		xenbus_frontend_closed(info->xbdev);
-- 
cgit v1.2.3


From 9897cb532382f075b337f7933b5a50f0ffc32d35 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:17 +0000
Subject: blkfront: Fix gendisk leak

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 3258ae67ac7a..62d32959095d 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1029,6 +1029,9 @@ static void blkfront_closing(struct blkfront_info *info)
 	blk_cleanup_queue(info->rq);
 	info->rq = NULL;
 
+	put_disk(info->gd);
+	info->gd = NULL;
+
  out:
 	if (info->xbdev)
 		xenbus_frontend_closed(info->xbdev);
-- 
cgit v1.2.3


From a66b5aebb7dc9e695dcb4b528906fd398b63f3d9 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Sat, 7 Aug 2010 18:33:17 +0200
Subject: blkfront: Clean up vbd release

 * Current blkfront_closing is rather a xlvbd_release_gendisk.
   Renamed in preparation of later patches (need the name again).

 * Removed the misleading comment -- this only applied to the backend
   switch handler, and the queue is already flushed btw.

 * Break out the xenbus call, callers know better when to switch
   frontend state.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 91 +++++++++++++++++++++-----------------------
 1 file changed, 43 insertions(+), 48 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 62d32959095d..d4cb7fd82b4c 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -534,6 +534,39 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
 	return err;
 }
 
+static void xlvbd_release_gendisk(struct blkfront_info *info)
+{
+	unsigned int minor, nr_minors;
+	unsigned long flags;
+
+	if (info->rq == NULL)
+		return;
+
+	spin_lock_irqsave(&blkif_io_lock, flags);
+
+	/* No more blkif_request(). */
+	blk_stop_queue(info->rq);
+
+	/* No more gnttab callback work. */
+	gnttab_cancel_free_callback(&info->callback);
+	spin_unlock_irqrestore(&blkif_io_lock, flags);
+
+	/* Flush gnttab callback work. Must be done with no locks held. */
+	flush_scheduled_work();
+
+	del_gendisk(info->gd);
+
+	minor = info->gd->first_minor;
+	nr_minors = info->gd->minors;
+	xlbd_release_minors(minor, nr_minors);
+
+	blk_cleanup_queue(info->rq);
+	info->rq = NULL;
+
+	put_disk(info->gd);
+	info->gd = NULL;
+}
+
 static void kick_pending_request_queues(struct blkfront_info *info)
 {
 	if (!RING_FULL(&info->ring)) {
@@ -994,49 +1027,6 @@ static void blkfront_connect(struct blkfront_info *info)
 	info->is_ready = 1;
 }
 
-/**
- * Handle the change of state of the backend to Closing.  We must delete our
- * device-layer structures now, to ensure that writes are flushed through to
- * the backend.  Once is this done, we can switch to Closed in
- * acknowledgement.
- */
-static void blkfront_closing(struct blkfront_info *info)
-{
-	unsigned int minor, nr_minors;
-	unsigned long flags;
-
-
-	if (info->rq == NULL)
-		goto out;
-
-	spin_lock_irqsave(&blkif_io_lock, flags);
-
-	/* No more blkif_request(). */
-	blk_stop_queue(info->rq);
-
-	/* No more gnttab callback work. */
-	gnttab_cancel_free_callback(&info->callback);
-	spin_unlock_irqrestore(&blkif_io_lock, flags);
-
-	/* Flush gnttab callback work. Must be done with no locks held. */
-	flush_scheduled_work();
-
-	minor = info->gd->first_minor;
-	nr_minors = info->gd->minors;
-	del_gendisk(info->gd);
-	xlbd_release_minors(minor, nr_minors);
-
-	blk_cleanup_queue(info->rq);
-	info->rq = NULL;
-
-	put_disk(info->gd);
-	info->gd = NULL;
-
- out:
-	if (info->xbdev)
-		xenbus_frontend_closed(info->xbdev);
-}
-
 /**
  * Callback received when the backend's state changes.
  */
@@ -1073,8 +1063,11 @@ static void blkback_changed(struct xenbus_device *dev,
 		if (info->users > 0)
 			xenbus_dev_error(dev, -EBUSY,
 					 "Device in use; refusing to close");
-		else
-			blkfront_closing(info);
+		else {
+			xlvbd_release_gendisk(info);
+			xenbus_frontend_closed(info->xbdev);
+		}
+
 		mutex_unlock(&bd->bd_mutex);
 		bdput(bd);
 		break;
@@ -1130,11 +1123,13 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 		struct xenbus_device *dev = info->xbdev;
 
 		if (!dev) {
-			blkfront_closing(info);
+			xlvbd_release_gendisk(info);
 			kfree(info);
 		} else if (xenbus_read_driver_state(dev->otherend)
-			   == XenbusStateClosing && info->is_ready)
-			blkfront_closing(info);
+			   == XenbusStateClosing && info->is_ready) {
+			xlvbd_release_gendisk(info);
+			xenbus_frontend_closed(dev);
+		}
 	}
 	unlock_kernel();
 	return 0;
-- 
cgit v1.2.3


From b70f5fa043b318659c936d8c3c696250e6528944 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:19 +0000
Subject: blkfront: Lock blkfront_info when closing

The bdev .open/.release fops race against backend switches to Closing,
handled by the XenBus thread.

The original code attempted to serialize block device holders and
xenbus only via bd_mutex. This is insufficient, the info->bd pointer
may already be stale (or null) while xenbus tries to bump up the
refcount.

Protect blkfront_info with a dedicated mutex.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 61 +++++++++++++++++++++++++++++---------------
 1 file changed, 40 insertions(+), 21 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d4cb7fd82b4c..1e406f0331e7 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -79,6 +79,7 @@ static const struct block_device_operations xlvbd_block_fops;
  */
 struct blkfront_info
 {
+	struct mutex mutex;
 	struct xenbus_device *xbdev;
 	struct gendisk *gd;
 	int vdevice;
@@ -804,7 +805,6 @@ again:
 	return err;
 }
 
-
 /**
  * Entry point to this code when a new device is created.  Allocate the basic
  * structures and the ring buffer for communication with the backend, and
@@ -836,6 +836,7 @@ static int blkfront_probe(struct xenbus_device *dev,
 		return -ENOMEM;
 	}
 
+	mutex_init(&info->mutex);
 	info->xbdev = dev;
 	info->vdevice = vdevice;
 	info->connected = BLKIF_STATE_DISCONNECTED;
@@ -951,6 +952,43 @@ static int blkfront_resume(struct xenbus_device *dev)
 	return err;
 }
 
+static void
+blkfront_closing(struct blkfront_info *info)
+{
+	struct xenbus_device *xbdev = info->xbdev;
+	struct block_device *bdev = NULL;
+
+	mutex_lock(&info->mutex);
+
+	if (xbdev->state == XenbusStateClosing) {
+		mutex_unlock(&info->mutex);
+		return;
+	}
+
+	if (info->gd)
+		bdev = bdget_disk(info->gd, 0);
+
+	mutex_unlock(&info->mutex);
+
+	if (!bdev) {
+		xenbus_frontend_closed(xbdev);
+		return;
+	}
+
+	mutex_lock(&bdev->bd_mutex);
+
+	if (info->users) {
+		xenbus_dev_error(xbdev, -EBUSY,
+				 "Device in use; refusing to close");
+		xenbus_switch_state(xbdev, XenbusStateClosing);
+	} else {
+		xlvbd_release_gendisk(info);
+		xenbus_frontend_closed(xbdev);
+	}
+
+	mutex_unlock(&bdev->bd_mutex);
+	bdput(bdev);
+}
 
 /*
  * Invoked when the backend is finally 'ready' (and has told produced
@@ -1034,7 +1072,6 @@ static void blkback_changed(struct xenbus_device *dev,
 			    enum xenbus_state backend_state)
 {
 	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
-	struct block_device *bd;
 
 	dev_dbg(&dev->dev, "blkfront:blkback_changed to state %d.\n", backend_state);
 
@@ -1051,25 +1088,7 @@ static void blkback_changed(struct xenbus_device *dev,
 		break;
 
 	case XenbusStateClosing:
-		if (info->gd == NULL) {
-			xenbus_frontend_closed(dev);
-			break;
-		}
-		bd = bdget_disk(info->gd, 0);
-		if (bd == NULL)
-			xenbus_dev_fatal(dev, -ENODEV, "bdget failed");
-
-		mutex_lock(&bd->bd_mutex);
-		if (info->users > 0)
-			xenbus_dev_error(dev, -EBUSY,
-					 "Device in use; refusing to close");
-		else {
-			xlvbd_release_gendisk(info);
-			xenbus_frontend_closed(info->xbdev);
-		}
-
-		mutex_unlock(&bd->bd_mutex);
-		bdput(bd);
+		blkfront_closing(info);
 		break;
 	}
 }
-- 
cgit v1.2.3


From 139617437aff1f0d3b57c2d7cc60e60efc8fe6c3 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Sat, 7 Aug 2010 18:36:53 +0200
Subject: blkfront: Fix blkfront backend switch race (bdev open)

We need not mind if users grab a late handle on a closing disk. We
probably even should not. But we have to make sure it's not a dead
one already

Let the bdev deal with a gendisk deleted under its feet. Takes the
info mutex to decide a race against backend closing.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 1e406f0331e7..763a315712cc 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1118,16 +1118,33 @@ static int blkfront_is_ready(struct xenbus_device *dev)
 
 static int blkif_open(struct block_device *bdev, fmode_t mode)
 {
-	struct blkfront_info *info = bdev->bd_disk->private_data;
-
-	if (!info->xbdev)
-		return -ENODEV;
+	struct gendisk *disk = bdev->bd_disk;
+	struct blkfront_info *info;
+	int err = 0;
 
 	lock_kernel();
-	info->users++;
-	unlock_kernel();
 
-	return 0;
+	info = disk->private_data;
+	if (!info) {
+		/* xbdev gone */
+		err = -ERESTARTSYS;
+		goto out;
+	}
+
+	mutex_lock(&info->mutex);
+
+	if (!info->gd)
+		/* xbdev is closed */
+		err = -ERESTARTSYS;
+
+	mutex_unlock(&info->mutex);
+
+	if (!err)
+		++info->users;
+
+	unlock_kernel();
+out:
+	return err;
 }
 
 static int blkif_release(struct gendisk *disk, fmode_t mode)
-- 
cgit v1.2.3


From 7fd152f4b6ae4f3cf89e4b7a0383cc3c470772fc Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Sat, 7 Aug 2010 18:45:12 +0200
Subject: blkfront: Fix blkfront backend switch race (bdev release)

We cannot read backend state within bdev operations, because it risks
grabbing the state change before xenbus gets to do it.

Fixed by tracking deferral with a frontend switch to Closing. State
exposure isn't strictly necessary, but the backends won't mind.

For a 'clean' deferral this seems actually a more decent protocol than
raising errors.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 49 +++++++++++++++++++++++++++++---------------
 1 file changed, 33 insertions(+), 16 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 763a315712cc..49862993f31e 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1142,31 +1142,48 @@ static int blkif_open(struct block_device *bdev, fmode_t mode)
 	if (!err)
 		++info->users;
 
-	unlock_kernel();
 out:
+	unlock_kernel();
 	return err;
 }
 
 static int blkif_release(struct gendisk *disk, fmode_t mode)
 {
 	struct blkfront_info *info = disk->private_data;
+	struct block_device *bdev;
+	struct xenbus_device *xbdev;
+
 	lock_kernel();
-	info->users--;
-	if (info->users == 0) {
-		/* Check whether we have been instructed to close.  We will
-		   have ignored this request initially, as the device was
-		   still mounted. */
-		struct xenbus_device *dev = info->xbdev;
-
-		if (!dev) {
-			xlvbd_release_gendisk(info);
-			kfree(info);
-		} else if (xenbus_read_driver_state(dev->otherend)
-			   == XenbusStateClosing && info->is_ready) {
-			xlvbd_release_gendisk(info);
-			xenbus_frontend_closed(dev);
-		}
+	if (--info->users)
+		goto out;
+
+	bdev = bdget_disk(disk, 0);
+	bdput(bdev);
+
+	/*
+	 * Check if we have been instructed to close. We will have
+	 * deferred this request, because the bdev was still open.
+	 */
+
+	mutex_lock(&info->mutex);
+	xbdev = info->xbdev;
+
+	if (xbdev && xbdev->state == XenbusStateClosing) {
+		/* pending switch to state closed */
+		xlvbd_release_gendisk(info);
+		xenbus_frontend_closed(info->xbdev);
+ 	}
+
+	mutex_unlock(&info->mutex);
+
+	if (!xbdev) {
+		/* sudden device removal */
+		xlvbd_release_gendisk(info);
+		disk->private_data = NULL;
+		kfree(info);
 	}
+
+out:
 	unlock_kernel();
 	return 0;
 }
-- 
cgit v1.2.3


From fa1bd3591a669b92b635dbdb11d1a32a5630821b Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:22 +0000
Subject: blkfront: Lock blockfront_info during xbdev removal

Same approach as blkfront_closing:
 * Grab the bdev safely, holding the info mutex.
 * Zap xbdev safely, holding the info mutex.
 * Try bdev removal safely, holding bd_mutex.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 41 +++++++++++++++++++++++++++++++++++------
 1 file changed, 35 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 49862993f31e..715de7d8ce01 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1093,18 +1093,47 @@ static void blkback_changed(struct xenbus_device *dev,
 	}
 }
 
-static int blkfront_remove(struct xenbus_device *dev)
+static int blkfront_remove(struct xenbus_device *xbdev)
 {
-	struct blkfront_info *info = dev_get_drvdata(&dev->dev);
+	struct blkfront_info *info = dev_get_drvdata(&xbdev->dev);
+	struct block_device *bdev = NULL;
+	struct gendisk *disk;
 
-	dev_dbg(&dev->dev, "blkfront_remove: %s removed\n", dev->nodename);
+	dev_dbg(&xbdev->dev, "%s removed", xbdev->nodename);
 
 	blkif_free(info, 0);
 
-	if(info->users == 0)
+	mutex_lock(&info->mutex);
+
+	disk = info->gd;
+	if (disk)
+		bdev = bdget_disk(disk, 0);
+
+	info->xbdev = NULL;
+	mutex_unlock(&info->mutex);
+
+	if (!bdev) {
+		kfree(info);
+		return 0;
+	}
+
+	/*
+	 * The xbdev was removed before we reached the Closed
+	 * state. See if it's safe to remove the disk. If the bdev
+	 * isn't closed yet, we let release take care of it.
+	 */
+
+	mutex_lock(&bdev->bd_mutex);
+	info = disk->private_data;
+
+	if (info && !info->users) {
+		xlvbd_release_gendisk(info);
+		disk->private_data = NULL;
 		kfree(info);
-	else
-		info->xbdev = NULL;
+	}
+
+	mutex_unlock(&bdev->bd_mutex);
+	bdput(bdev);
 
 	return 0;
 }
-- 
cgit v1.2.3


From acfca3c622a009fb62b566604452ab9fb3a11019 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Sat, 7 Aug 2010 18:47:26 +0200
Subject: blkfront: Remove obsolete info->users

This is just bd_openers, protected by the bd_mutex.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 715de7d8ce01..9c5a25a462e6 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1168,9 +1168,6 @@ static int blkif_open(struct block_device *bdev, fmode_t mode)
 
 	mutex_unlock(&info->mutex);
 
-	if (!err)
-		++info->users;
-
 out:
 	unlock_kernel();
 	return err;
@@ -1183,12 +1180,13 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 	struct xenbus_device *xbdev;
 
 	lock_kernel();
-	if (--info->users)
-		goto out;
 
 	bdev = bdget_disk(disk, 0);
 	bdput(bdev);
 
+	if (bdev->bd_openers)
+		goto out;
+
 	/*
 	 * Check if we have been instructed to close. We will have
 	 * deferred this request, because the bdev was still open.
@@ -1212,7 +1210,6 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 		kfree(info);
 	}
 
-out:
 	unlock_kernel();
 	return 0;
 }
-- 
cgit v1.2.3


From 7b32d1044ae791a1e53a53023bf2668438d5301b Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Fri, 30 Apr 2010 22:01:23 +0000
Subject: blkfront: Remove obsolete info->users

This is just bd_openers, protected by the bd_mutex.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9c5a25a462e6..b01167b6207a 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -96,12 +96,6 @@ struct blkfront_info
 	unsigned long shadow_free;
 	int feature_barrier;
 	int is_ready;
-
-	/**
-	 * The number of people holding this device open.  We won't allow a
-	 * hot-unplug unless this is 0.
-	 */
-	int users;
 };
 
 static DEFINE_SPINLOCK(blkif_io_lock);
@@ -977,7 +971,7 @@ blkfront_closing(struct blkfront_info *info)
 
 	mutex_lock(&bdev->bd_mutex);
 
-	if (info->users) {
+	if (bdev->bd_openers) {
 		xenbus_dev_error(xbdev, -EBUSY,
 				 "Device in use; refusing to close");
 		xenbus_switch_state(xbdev, XenbusStateClosing);
@@ -1126,7 +1120,7 @@ static int blkfront_remove(struct xenbus_device *xbdev)
 	mutex_lock(&bdev->bd_mutex);
 	info = disk->private_data;
 
-	if (info && !info->users) {
+	if (info && !bdev->bd_openers) {
 		xlvbd_release_gendisk(info);
 		disk->private_data = NULL;
 		kfree(info);
-- 
cgit v1.2.3


From d54142c71f05b608b7360d80bdab74eed0f17a98 Mon Sep 17 00:00:00 2001
From: Daniel Stodden <daniel.stodden@citrix.com>
Date: Sat, 7 Aug 2010 18:51:21 +0200
Subject: blkfront: Klog the unclean release path

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index b01167b6207a..c6727b5cefd6 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1120,6 +1120,10 @@ static int blkfront_remove(struct xenbus_device *xbdev)
 	mutex_lock(&bdev->bd_mutex);
 	info = disk->private_data;
 
+	dev_warn(disk_to_dev(disk),
+		 "%s was hot-unplugged, %d stale handles\n",
+		 xbdev->nodename, bdev->bd_openers);
+
 	if (info && !bdev->bd_openers) {
 		xlvbd_release_gendisk(info);
 		disk->private_data = NULL;
@@ -1191,6 +1195,7 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 
 	if (xbdev && xbdev->state == XenbusStateClosing) {
 		/* pending switch to state closed */
+		dev_info(disk_to_dev(bdev->bd_disk), "releasing disk\n");
 		xlvbd_release_gendisk(info);
 		xenbus_frontend_closed(info->xbdev);
  	}
@@ -1199,6 +1204,7 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 
 	if (!xbdev) {
 		/* sudden device removal */
+		dev_info(disk_to_dev(bdev->bd_disk), "releasing disk\n");
 		xlvbd_release_gendisk(info);
 		disk->private_data = NULL;
 		kfree(info);
-- 
cgit v1.2.3


From 373b45f7b691bf7faafeed46b0b3dcd5b281cd5f Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:44:45 -0500
Subject: cciss: Set the performant mode bit in the scsi half of the driver

cciss: Set the performant mode bit in the scsi half of the driver
In a couple of places, the performant mode bit wasn't being set in
the scsi half of the driver, causing commands to seem to hang.  Use
enqueue_cmd_and_start_io() where appropriate.  This fixes a bug that

	echo engage scsi > /proc/driver/cciss/cciss0

would hang.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss_scsi.c | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 8e0a709286df..3604b72f2af9 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -921,7 +921,6 @@ cciss_scsi_do_simple_cmd(ctlr_info_t *c,
 			unsigned char *buf, int bufsize,
 			int direction)
 {
-	unsigned long flags;
 	DECLARE_COMPLETION_ONSTACK(wait);
 
 	cp->cmd_type = CMD_IOCTL_PEND;		// treat this like an ioctl 
@@ -948,14 +947,7 @@ cciss_scsi_do_simple_cmd(ctlr_info_t *c,
 			bufsize, DMA_FROM_DEVICE); 
 
 	cp->waiting = &wait;
-
-	/* Put the request on the tail of the request queue */
-	spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
-	addQ(&c->reqQ, cp);
-	c->Qdepth++;
-	start_io(c);
-	spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
-
+	enqueue_cmd_and_start_io(c, cp);
 	wait_for_completion(&wait);
 
 	/* undo the dma mapping */
@@ -1525,15 +1517,7 @@ cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd
 		break;
 	}
 	cciss_scatter_gather(c, cp, cmd);
-
-	/* Put the request on the tail of the request queue */
-
-	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-	addQ(&c->reqQ, cp);
-	c->Qdepth++;
-	start_io(c);
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
-
+	enqueue_cmd_and_start_io(c, cp);
 	/* the cmd'll come back via intr handler in complete_scsi_command()  */
 	return 0;
 }
-- 
cgit v1.2.3


From 292e50dd393a8359798f1f20ac4d48ec835ffa04 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:44:50 -0500
Subject: cciss: save pdev pointer in per hba structure early to avoid passing
 it around so much.

cciss: save pdev pointer in per hba structure early to avoid passing it around so much.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 61 ++++++++++++++++++++++++++-------------------------
 1 file changed, 31 insertions(+), 30 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 665a470310a9..b79ce8e960f8 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -199,8 +199,7 @@ static void cciss_geometry_inquiry(int ctlr, int logvol,
 			sector_t total_size,
 			unsigned int block_size, InquiryData_struct *inq_buff,
 				   drive_info_struct *drv);
-static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
-					   __u32);
+static void __devinit cciss_interrupt_mode(ctlr_info_t *, __u32);
 static void start_io(ctlr_info_t *h);
 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
 			__u8 page_code, unsigned char scsi3addr[],
@@ -3933,8 +3932,7 @@ clean_up:
  * controllers that are capable. If not, we use IO-APIC mode.
  */
 
-static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
-					   struct pci_dev *pdev, __u32 board_id)
+static void __devinit cciss_interrupt_mode(ctlr_info_t *c, __u32 board_id)
 {
 #ifdef CONFIG_PCI_MSI
 	int err;
@@ -3948,8 +3946,8 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
 	    (board_id == 0x40820E11) || (board_id == 0x40830E11))
 		goto default_int_mode;
 
-	if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
-		err = pci_enable_msix(pdev, cciss_msix_entries, 4);
+	if (pci_find_capability(c->pdev, PCI_CAP_ID_MSIX)) {
+		err = pci_enable_msix(c->pdev, cciss_msix_entries, 4);
 		if (!err) {
 			c->intr[0] = cciss_msix_entries[0].vector;
 			c->intr[1] = cciss_msix_entries[1].vector;
@@ -3968,8 +3966,8 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
 			goto default_int_mode;
 		}
 	}
-	if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
-		if (!pci_enable_msi(pdev)) {
+	if (pci_find_capability(c->pdev, PCI_CAP_ID_MSI)) {
+		if (!pci_enable_msi(c->pdev)) {
 			c->msi_vector = 1;
 		} else {
 			printk(KERN_WARNING "cciss: MSI init failed\n");
@@ -3978,11 +3976,11 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
 default_int_mode:
 #endif				/* CONFIG_PCI_MSI */
 	/* if we get here we're going to use the default interrupt mode */
-	c->intr[PERF_MODE_INT] = pdev->irq;
+	c->intr[PERF_MODE_INT] = c->pdev->irq;
 	return;
 }
 
-static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
+static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
 	ushort subsystem_vendor_id, subsystem_device_id, command;
 	__u32 board_id, scratchpad = 0;
@@ -3992,8 +3990,8 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	int i, prod_index, err;
 	__u32 trans_offset;
 
-	subsystem_vendor_id = pdev->subsystem_vendor;
-	subsystem_device_id = pdev->subsystem_device;
+	subsystem_vendor_id = c->pdev->subsystem_vendor;
+	subsystem_device_id = c->pdev->subsystem_device;
 	board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
 		    subsystem_vendor_id);
 
@@ -4006,7 +4004,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	}
 	prod_index = i;
 	if (prod_index == ARRAY_SIZE(products)) {
-		dev_warn(&pdev->dev,
+		dev_warn(&c->pdev->dev,
 			"unrecognized board ID: 0x%08lx, ignoring.\n",
 			(unsigned long) board_id);
 		return -ENODEV;
@@ -4014,20 +4012,20 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 
 	/* check to see if controller has been disabled */
 	/* BEFORE trying to enable it */
-	(void)pci_read_config_word(pdev, PCI_COMMAND, &command);
+	(void)pci_read_config_word(c->pdev, PCI_COMMAND, &command);
 	if (!(command & 0x02)) {
 		printk(KERN_WARNING
 		       "cciss: controller appears to be disabled\n");
 		return -ENODEV;
 	}
 
-	err = pci_enable_device(pdev);
+	err = pci_enable_device(c->pdev);
 	if (err) {
 		printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
 		return err;
 	}
 
-	err = pci_request_regions(pdev, "cciss");
+	err = pci_request_regions(c->pdev, "cciss");
 	if (err) {
 		printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
 		       "aborting\n");
@@ -4035,19 +4033,19 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 	}
 
 #ifdef CCISS_DEBUG
-	printk("command = %x\n", command);
-	printk("irq = %x\n", pdev->irq);
-	printk("board_id = %x\n", board_id);
+	printk(KERN_INFO "command = %x\n", command);
+	printk(KERN_INFO "irq = %x\n", c->pdev->irq);
+	printk(KERN_INFO "board_id = %x\n", board_id);
 #endif				/* CCISS_DEBUG */
 
 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
  * else we use the IO-APIC interrupt assigned to us by system ROM.
  */
-	cciss_interrupt_mode(c, pdev, board_id);
+	cciss_interrupt_mode(c, board_id);
 
 	/* find the memory BAR */
 	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
-		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
+		if (pci_resource_flags(c->pdev, i) & IORESOURCE_MEM)
 			break;
 	}
 	if (i == DEVICE_COUNT_RESOURCE) {
@@ -4056,7 +4054,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 		goto err_out_free_res;
 	}
 
-	c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
+	c->paddr = pci_resource_start(c->pdev, i); /* addressing mode bits
 						 * already removed
 						 */
 
@@ -4086,7 +4084,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 #ifdef CCISS_DEBUG
 	printk("cfg base address = %x\n", cfg_base_addr);
 #endif				/* CCISS_DEBUG */
-	cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
+	cfg_base_addr_index = find_PCI_BAR_index(c->pdev, cfg_base_addr);
 #ifdef CCISS_DEBUG
 	printk("cfg base address index = %llx\n",
 		(unsigned long long)cfg_base_addr_index);
@@ -4101,12 +4099,12 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 #ifdef CCISS_DEBUG
 	printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
 #endif				/* CCISS_DEBUG */
-	c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
+	c->cfgtable = remap_pci_mem(pci_resource_start(c->pdev,
 						       cfg_base_addr_index) +
 				    cfg_offset, sizeof(CfgTable_struct));
 	/* Find performant mode table. */
 	trans_offset = readl(&(c->cfgtable->TransMethodOffset));
-	c->transtable = remap_pci_mem(pci_resource_start(pdev,
+	c->transtable = remap_pci_mem(pci_resource_start(c->pdev,
 		cfg_base_addr_index) + cfg_offset+trans_offset,
 		sizeof(*c->transtable));
 	c->board_id = board_id;
@@ -4173,9 +4171,11 @@ static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
 		dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
 		dma_prefetch |= 0x8000;
 		writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
-		pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
+		pci_read_config_dword(c->pdev, PCI_COMMAND_PARITY,
+			&dma_refetch);
 		dma_refetch |= 0x1;
-		pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
+		pci_write_config_dword(c->pdev, PCI_COMMAND_PARITY,
+			dma_refetch);
 	}
 
 #ifdef CCISS_DEBUG
@@ -4189,7 +4189,7 @@ err_out_free_res:
 	 * Deliberately omit pci_disable_device(): it does something nasty to
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
-	pci_release_regions(pdev);
+	pci_release_regions(c->pdev);
 	return err;
 }
 
@@ -4466,17 +4466,18 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	i = alloc_cciss_hba();
 	if (i < 0)
 		return -1;
+
+	hba[i]->pdev = pdev;
 	hba[i]->busy_initializing = 1;
 	INIT_HLIST_HEAD(&hba[i]->cmpQ);
 	INIT_HLIST_HEAD(&hba[i]->reqQ);
 	mutex_init(&hba[i]->busy_shutting_down);
 
-	if (cciss_pci_init(hba[i], pdev) != 0)
+	if (cciss_pci_init(hba[i]) != 0)
 		goto clean_no_release_regions;
 
 	sprintf(hba[i]->devname, "cciss%d", i);
 	hba[i]->ctlr = i;
-	hba[i]->pdev = pdev;
 
 	init_completion(&hba[i]->scan_wait);
 
-- 
cgit v1.2.3


From 6539fa9b2e2e7fc3b3fe819e54aa7be83f0370fa Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:44:55 -0500
Subject: cciss: factor out cciss_lookup_board_id

cciss: factor out cciss_lookup_board_id

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 66 +++++++++++++++++++++++++++------------------------
 1 file changed, 35 insertions(+), 31 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b79ce8e960f8..d4167c29213d 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3980,35 +3980,43 @@ default_int_mode:
 	return;
 }
 
-static int __devinit cciss_pci_init(ctlr_info_t *c)
+static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
 {
-	ushort subsystem_vendor_id, subsystem_device_id, command;
-	__u32 board_id, scratchpad = 0;
-	__u64 cfg_offset;
-	__u32 cfg_base_addr;
-	__u64 cfg_base_addr_index;
-	int i, prod_index, err;
-	__u32 trans_offset;
+	int i;
+	u32 subsystem_vendor_id, subsystem_device_id;
 
-	subsystem_vendor_id = c->pdev->subsystem_vendor;
-	subsystem_device_id = c->pdev->subsystem_device;
-	board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
-		    subsystem_vendor_id);
+	subsystem_vendor_id = pdev->subsystem_vendor;
+	subsystem_device_id = pdev->subsystem_device;
+	*board_id = ((subsystem_device_id << 16) & 0xffff0000) |
+			subsystem_vendor_id;
 
 	for (i = 0; i < ARRAY_SIZE(products); i++) {
 		/* Stand aside for hpsa driver on request */
 		if (cciss_allow_hpsa && products[i].board_id == HPSA_BOUNDARY)
 			return -ENODEV;
-		if (board_id == products[i].board_id)
-			break;
+		if (*board_id == products[i].board_id)
+			return i;
 	}
-	prod_index = i;
-	if (prod_index == ARRAY_SIZE(products)) {
-		dev_warn(&c->pdev->dev,
-			"unrecognized board ID: 0x%08lx, ignoring.\n",
-			(unsigned long) board_id);
+	dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
+		*board_id);
+	return -ENODEV;
+}
+
+static int __devinit cciss_pci_init(ctlr_info_t *c)
+{
+	ushort command;
+	__u32 scratchpad = 0;
+	__u64 cfg_offset;
+	__u32 cfg_base_addr;
+	__u64 cfg_base_addr_index;
+	__u32 trans_offset;
+	int i, prod_index, err;
+
+	prod_index = cciss_lookup_board_id(c->pdev, &c->board_id);
+	if (prod_index < 0)
 		return -ENODEV;
-	}
+	c->product_name = products[prod_index].product_name;
+	c->access = *(products[prod_index].access);
 
 	/* check to see if controller has been disabled */
 	/* BEFORE trying to enable it */
@@ -4035,13 +4043,13 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 #ifdef CCISS_DEBUG
 	printk(KERN_INFO "command = %x\n", command);
 	printk(KERN_INFO "irq = %x\n", c->pdev->irq);
-	printk(KERN_INFO "board_id = %x\n", board_id);
+	printk(KERN_INFO "board_id = %x\n", c->board_id);
 #endif				/* CCISS_DEBUG */
 
 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
  * else we use the IO-APIC interrupt assigned to us by system ROM.
  */
-	cciss_interrupt_mode(c, board_id);
+	cciss_interrupt_mode(c, c->board_id);
 
 	/* find the memory BAR */
 	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
@@ -4107,11 +4115,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	c->transtable = remap_pci_mem(pci_resource_start(c->pdev,
 		cfg_base_addr_index) + cfg_offset+trans_offset,
 		sizeof(*c->transtable));
-	c->board_id = board_id;
-
-	#ifdef CCISS_DEBUG
-		print_cfg_table(c->cfgtable);
-	#endif				/* CCISS_DEBUG */
+#ifdef CCISS_DEBUG
+	print_cfg_table(c->cfgtable);
+#endif				/* CCISS_DEBUG */
 
 	/* Some controllers support Zero Memory Raid (ZMR).
 	 * When configured in ZMR mode the number of supported
@@ -4139,8 +4145,6 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 		c->chainsize = 0;       /* traditional */
 	}
 
-	c->product_name = products[prod_index].product_name;
-	c->access = *(products[prod_index].access);
 	c->nr_cmds = c->max_commands - 4;
 	if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
 	    (readb(&c->cfgtable->Signature[1]) != 'I') ||
@@ -4165,8 +4169,8 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	 * We've disabled prefetch for some time now. Testing with XEN
 	 * kernels revealed a bug in the refetch if dom0 resides on a P600.
 	 */
-	if(board_id == 0x3225103C) {
-			__u32 dma_prefetch;
+	if (c->board_id == 0x3225103C) {
+		__u32 dma_prefetch;
 		__u32 dma_refetch;
 		dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
 		dma_prefetch |= 0x8000;
-- 
cgit v1.2.3


From dd9c426e92d0cbd710c8df5b84afe9a2eeda3918 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:00 -0500
Subject: cciss: factor out cciss_board_disabled

cciss: factor out cciss_board_disabled

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index d4167c29213d..808d2a5b46bb 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4002,9 +4002,16 @@ static int __devinit cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
 	return -ENODEV;
 }
 
+static inline bool cciss_board_disabled(ctlr_info_t *h)
+{
+	u16 command;
+
+	(void) pci_read_config_word(h->pdev, PCI_COMMAND, &command);
+	return ((command & PCI_COMMAND_MEMORY) == 0);
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
-	ushort command;
 	__u32 scratchpad = 0;
 	__u64 cfg_offset;
 	__u32 cfg_base_addr;
@@ -4018,15 +4025,11 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	c->product_name = products[prod_index].product_name;
 	c->access = *(products[prod_index].access);
 
-	/* check to see if controller has been disabled */
-	/* BEFORE trying to enable it */
-	(void)pci_read_config_word(c->pdev, PCI_COMMAND, &command);
-	if (!(command & 0x02)) {
+	if (cciss_board_disabled(c)) {
 		printk(KERN_WARNING
 		       "cciss: controller appears to be disabled\n");
 		return -ENODEV;
 	}
-
 	err = pci_enable_device(c->pdev);
 	if (err) {
 		printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
-- 
cgit v1.2.3


From dac5488a9ed6b6e59749e161209a6678980803f1 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:05 -0500
Subject: cciss: remove board_id parameter from cciss_interrupt_mode()

cciss: remove board_id parameter from cciss_interrupt_mode()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 808d2a5b46bb..bb22a80d448f 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -199,7 +199,7 @@ static void cciss_geometry_inquiry(int ctlr, int logvol,
 			sector_t total_size,
 			unsigned int block_size, InquiryData_struct *inq_buff,
 				   drive_info_struct *drv);
-static void __devinit cciss_interrupt_mode(ctlr_info_t *, __u32);
+static void __devinit cciss_interrupt_mode(ctlr_info_t *);
 static void start_io(ctlr_info_t *h);
 static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
 			__u8 page_code, unsigned char scsi3addr[],
@@ -3932,7 +3932,7 @@ clean_up:
  * controllers that are capable. If not, we use IO-APIC mode.
  */
 
-static void __devinit cciss_interrupt_mode(ctlr_info_t *c, __u32 board_id)
+static void __devinit cciss_interrupt_mode(ctlr_info_t *c)
 {
 #ifdef CONFIG_PCI_MSI
 	int err;
@@ -3941,9 +3941,8 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c, __u32 board_id)
 	};
 
 	/* Some boards advertise MSI but don't really support it */
-	if ((board_id == 0x40700E11) ||
-	    (board_id == 0x40800E11) ||
-	    (board_id == 0x40820E11) || (board_id == 0x40830E11))
+	if ((c->board_id == 0x40700E11) || (c->board_id == 0x40800E11) ||
+	    (c->board_id == 0x40820E11) || (c->board_id == 0x40830E11))
 		goto default_int_mode;
 
 	if (pci_find_capability(c->pdev, PCI_CAP_ID_MSIX)) {
@@ -4052,7 +4051,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
  * else we use the IO-APIC interrupt assigned to us by system ROM.
  */
-	cciss_interrupt_mode(c, c->board_id);
+	cciss_interrupt_mode(c);
 
 	/* find the memory BAR */
 	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
-- 
cgit v1.2.3


From d474830da6218c0b7f81eab03aff7d8c539bdb57 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:10 -0500
Subject: cciss: factor out cciss_find_memory_BAR()

cciss: factor out cciss_find_memory_BAR()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index bb22a80d448f..9c9c79c0aa98 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4009,6 +4009,23 @@ static inline bool cciss_board_disabled(ctlr_info_t *h)
 	return ((command & PCI_COMMAND_MEMORY) == 0);
 }
 
+static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
+	unsigned long *memory_bar)
+{
+	int i;
+
+	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
+		if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+			/* addressing mode bits already removed */
+			*memory_bar = pci_resource_start(pdev, i);
+			dev_dbg(&pdev->dev, "memory BAR = %lx\n",
+				*memory_bar);
+			return 0;
+		}
+	dev_warn(&pdev->dev, "no memory BAR found\n");
+	return -ENODEV;
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
 	__u32 scratchpad = 0;
@@ -4052,25 +4069,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
  * else we use the IO-APIC interrupt assigned to us by system ROM.
  */
 	cciss_interrupt_mode(c);
-
-	/* find the memory BAR */
-	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
-		if (pci_resource_flags(c->pdev, i) & IORESOURCE_MEM)
-			break;
-	}
-	if (i == DEVICE_COUNT_RESOURCE) {
-		printk(KERN_WARNING "cciss: No memory BAR found\n");
-		err = -ENODEV;
+	err = cciss_pci_find_memory_BAR(c->pdev, &c->paddr);
+	if (err)
 		goto err_out_free_res;
-	}
-
-	c->paddr = pci_resource_start(c->pdev, i); /* addressing mode bits
-						 * already removed
-						 */
-
-#ifdef CCISS_DEBUG
-	printk("address 0 = %lx\n", c->paddr);
-#endif				/* CCISS_DEBUG */
 	c->vaddr = remap_pci_mem(c->paddr, 0x250);
 
 	/* Wait for the board to become ready.  (PCI hotplug needs this.)
-- 
cgit v1.2.3


From e99ba1362723df14bbe36da6eeaadf81d95782e6 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:15 -0500
Subject: cciss: factor out cciss_wait_for_board_ready()

cciss: factor out cciss_wait_for_board_ready()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 32 +++++++++++++++++---------------
 drivers/block/cciss.h | 15 +++++++++++++++
 2 files changed, 32 insertions(+), 15 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 9c9c79c0aa98..286c81d70818 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4026,9 +4026,23 @@ static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
 	return -ENODEV;
 }
 
+static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
+{
+	int i;
+	u32 scratchpad;
+
+	for (i = 0; i < CCISS_BOARD_READY_ITERATIONS; i++) {
+		scratchpad = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
+		if (scratchpad == CCISS_FIRMWARE_READY)
+			return 0;
+		msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
+	}
+	dev_warn(&h->pdev->dev, "board not ready, timed out.\n");
+	return -ENODEV;
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
-	__u32 scratchpad = 0;
 	__u64 cfg_offset;
 	__u32 cfg_base_addr;
 	__u64 cfg_base_addr_index;
@@ -4073,21 +4087,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	if (err)
 		goto err_out_free_res;
 	c->vaddr = remap_pci_mem(c->paddr, 0x250);
-
-	/* Wait for the board to become ready.  (PCI hotplug needs this.)
-	 * We poll for up to 120 secs, once per 100ms. */
-	for (i = 0; i < 1200; i++) {
-		scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
-		if (scratchpad == CCISS_FIRMWARE_READY)
-			break;
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(msecs_to_jiffies(100));	/* wait 100ms */
-	}
-	if (scratchpad != CCISS_FIRMWARE_READY) {
-		printk(KERN_WARNING "cciss: Board not ready.  Timed out.\n");
-		err = -ENODEV;
+	err = cciss_wait_for_board_ready(c);
+	if (err)
 		goto err_out_free_res;
-	}
 
 	/* get the address index number */
 	cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 8a9f5b58daa8..c2ef9dd56c45 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -190,6 +190,21 @@ struct ctlr_info
 
 #define CCISS_INTR_ON 	1 
 #define CCISS_INTR_OFF	0
+
+
+/* CCISS_BOARD_READY_WAIT_SECS is how long to wait for a board
+ * to become ready, in seconds, before giving up on it.
+ * CCISS_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
+ * between polling the board to see if it is ready, in
+ * milliseconds.  CCISS_BOARD_READY_ITERATIONS is derived
+ * the above.
+ */
+#define CCISS_BOARD_READY_WAIT_SECS (120)
+#define CCISS_BOARD_READY_POLL_INTERVAL_MSECS (100)
+#define CCISS_BOARD_READY_ITERATIONS \
+	((CCISS_BOARD_READY_WAIT_SECS * 1000) / \
+		CCISS_BOARD_READY_POLL_INTERVAL_MSECS)
+
 /* 
 	Send the command to the hardware 
 */
-- 
cgit v1.2.3


From 4809d0988f10e305511d1a3e223880fa4b21f90e Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:21 -0500
Subject: cciss: factor out cciss_find_cfgtables

cciss: factor out cciss_find_cfgtables

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 68 +++++++++++++++++++++++++--------------------------
 1 file changed, 34 insertions(+), 34 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 286c81d70818..c297d31d0c97 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4041,13 +4041,40 @@ static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
 	return -ENODEV;
 }
 
+static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
+{
+	u64 cfg_offset;
+	u32 cfg_base_addr;
+	u64 cfg_base_addr_index;
+	u32 trans_offset;
+
+	/* get the address index number */
+	cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
+	cfg_base_addr &= (u32) 0x0000ffff;
+	cfg_base_addr_index = find_PCI_BAR_index(h->pdev, cfg_base_addr);
+	if (cfg_base_addr_index == -1) {
+		dev_warn(&h->pdev->dev, "cannot find cfg_base_addr_index\n");
+		return -ENODEV;
+	}
+	cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
+	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
+			       cfg_base_addr_index) + cfg_offset,
+				sizeof(h->cfgtable));
+	if (!h->cfgtable)
+		return -ENOMEM;
+	/* Find performant mode table. */
+	trans_offset = readl(&(h->cfgtable->TransMethodOffset));
+	h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
+				cfg_base_addr_index)+cfg_offset+trans_offset,
+				sizeof(*h->transtable));
+	if (!h->transtable)
+		return -ENOMEM;
+	return 0;
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
-	__u64 cfg_offset;
-	__u32 cfg_base_addr;
-	__u64 cfg_base_addr_index;
-	__u32 trans_offset;
-	int i, prod_index, err;
+	int prod_index, err;
 
 	prod_index = cciss_lookup_board_id(c->pdev, &c->board_id);
 	if (prod_index < 0)
@@ -4090,36 +4117,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	err = cciss_wait_for_board_ready(c);
 	if (err)
 		goto err_out_free_res;
-
-	/* get the address index number */
-	cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
-	cfg_base_addr &= (__u32) 0x0000ffff;
-#ifdef CCISS_DEBUG
-	printk("cfg base address = %x\n", cfg_base_addr);
-#endif				/* CCISS_DEBUG */
-	cfg_base_addr_index = find_PCI_BAR_index(c->pdev, cfg_base_addr);
-#ifdef CCISS_DEBUG
-	printk("cfg base address index = %llx\n",
-		(unsigned long long)cfg_base_addr_index);
-#endif				/* CCISS_DEBUG */
-	if (cfg_base_addr_index == -1) {
-		printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
-		err = -ENODEV;
+	err = cciss_find_cfgtables(c);
+	if (err)
 		goto err_out_free_res;
-	}
-
-	cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
-#ifdef CCISS_DEBUG
-	printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
-#endif				/* CCISS_DEBUG */
-	c->cfgtable = remap_pci_mem(pci_resource_start(c->pdev,
-						       cfg_base_addr_index) +
-				    cfg_offset, sizeof(CfgTable_struct));
-	/* Find performant mode table. */
-	trans_offset = readl(&(c->cfgtable->TransMethodOffset));
-	c->transtable = remap_pci_mem(pci_resource_start(c->pdev,
-		cfg_base_addr_index) + cfg_offset+trans_offset,
-		sizeof(*c->transtable));
 #ifdef CCISS_DEBUG
 	print_cfg_table(c->cfgtable);
 #endif				/* CCISS_DEBUG */
-- 
cgit v1.2.3


From da5503217d7421dbf04a0557d16cae6d5fc0960e Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:26 -0500
Subject: cciss: fix leak of ioremapped memory

cciss: fix leak of ioremapped memory
in cciss_pci_init error path.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index c297d31d0c97..b70247110608 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4114,6 +4114,10 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	if (err)
 		goto err_out_free_res;
 	c->vaddr = remap_pci_mem(c->paddr, 0x250);
+	if (!c->vaddr) {
+		err = -ENOMEM;
+		goto err_out_free_res;
+	}
 	err = cciss_wait_for_board_ready(c);
 	if (err)
 		goto err_out_free_res;
@@ -4198,6 +4202,12 @@ err_out_free_res:
 	 * Deliberately omit pci_disable_device(): it does something nasty to
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
+	if (c->transtable)
+		iounmap(c->transtable);
+	if (c->cfgtable)
+		iounmap(c->cfgtable);
+	if (c->vaddr)
+		iounmap(c->vaddr);
 	pci_release_regions(c->pdev);
 	return err;
 }
@@ -4745,6 +4755,8 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
 		pci_disable_msi(hba[i]->pdev);
 #endif				/* CONFIG_PCI_MSI */
 
+	iounmap(hba[i]->transtable);
+	iounmap(hba[i]->cfgtable);
 	iounmap(hba[i]->vaddr);
 
 	pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
-- 
cgit v1.2.3


From afadbf4b9591f3318508792ad98c347336a1a95d Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:31 -0500
Subject: cciss: factor out cciss_find_board_params

cciss: factor out cciss_find_board_params

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 52 +++++++++++++++++++++++++--------------------------
 1 file changed, 25 insertions(+), 27 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b70247110608..97feb50675cf 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4072,6 +4072,30 @@ static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
 	return 0;
 }
 
+/* Interrogate the hardware for some limits:
+ * max commands, max SG elements without chaining, and with chaining,
+ * SG chain block size, etc.
+ */
+static void __devinit cciss_find_board_params(ctlr_info_t *h)
+{
+	h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
+	h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
+	h->maxsgentries = readl(&(h->cfgtable->MaxSGElements));
+	/*
+	 * Limit in-command s/g elements to 32 save dma'able memory.
+	 * Howvever spec says if 0, use 31
+	 */
+	h->max_cmd_sgentries = 31;
+	if (h->maxsgentries > 512) {
+		h->max_cmd_sgentries = 32;
+		h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1;
+		h->maxsgentries--; /* save one for chain pointer */
+	} else {
+		h->maxsgentries = 31; /* default to traditional values */
+		h->chainsize = 0;
+	}
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
 	int prod_index, err;
@@ -4127,34 +4151,8 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 #ifdef CCISS_DEBUG
 	print_cfg_table(c->cfgtable);
 #endif				/* CCISS_DEBUG */
+	cciss_find_board_params(c);
 
-	/* Some controllers support Zero Memory Raid (ZMR).
-	 * When configured in ZMR mode the number of supported
-	 * commands drops to 64. So instead of just setting an
-	 * arbitrary value we make the driver a little smarter.
-	 * We read the config table to tell us how many commands
-	 * are supported on the controller then subtract 4 to
-	 * leave a little room for ioctl calls.
-	 */
-	c->max_commands = readl(&(c->cfgtable->MaxPerformantModeCommands));
-	c->maxsgentries = readl(&(c->cfgtable->MaxSGElements));
-
-	/*
-	 * Limit native command to 32 s/g elements to save dma'able memory.
-	 * Howvever spec says if 0, use 31
-	 */
-
-	c->max_cmd_sgentries = 31;
-	if (c->maxsgentries > 512) {
-		c->max_cmd_sgentries = 32;
-		c->chainsize = c->maxsgentries - c->max_cmd_sgentries + 1;
-		c->maxsgentries -= 1;   /* account for chain pointer */
-	} else {
-		c->maxsgentries = 31;   /* Default to traditional value */
-		c->chainsize = 0;       /* traditional */
-	}
-
-	c->nr_cmds = c->max_commands - 4;
 	if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
 	    (readb(&c->cfgtable->Signature[1]) != 'I') ||
 	    (readb(&c->cfgtable->Signature[2]) != 'S') ||
-- 
cgit v1.2.3


From 501b92cd6b394ba56bb978fd55606b5639b4d3fb Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:36 -0500
Subject: cciss: factor out CISS_signature_present()

cciss: factor out CISS_signature_present()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 97feb50675cf..9a4869572a0b 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4096,6 +4096,18 @@ static void __devinit cciss_find_board_params(ctlr_info_t *h)
 	}
 }
 
+static inline bool CISS_signature_present(ctlr_info_t *h)
+{
+	if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
+	    (readb(&h->cfgtable->Signature[1]) != 'I') ||
+	    (readb(&h->cfgtable->Signature[2]) != 'S') ||
+	    (readb(&h->cfgtable->Signature[3]) != 'S')) {
+		dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
+		return false;
+	}
+	return true;
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
 	int prod_index, err;
@@ -4153,11 +4165,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 #endif				/* CCISS_DEBUG */
 	cciss_find_board_params(c);
 
-	if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
-	    (readb(&c->cfgtable->Signature[1]) != 'I') ||
-	    (readb(&c->cfgtable->Signature[2]) != 'S') ||
-	    (readb(&c->cfgtable->Signature[3]) != 'S')) {
-		printk("Does not appear to be a valid CISS config table\n");
+	if (!CISS_signature_present(c)) {
 		err = -ENODEV;
 		goto err_out_free_res;
 	}
-- 
cgit v1.2.3


From 322e304c4d71b79b3950ca560db4868cc3e04ee6 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:41 -0500
Subject: cciss: factor out cciss_enable_scsi_prefetch()

cciss: factor out cciss_enable_scsi_prefetch()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 9a4869572a0b..b4264bcda618 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4108,6 +4108,18 @@ static inline bool CISS_signature_present(ctlr_info_t *h)
 	return true;
 }
 
+/* Need to enable prefetch in the SCSI core for 6400 in x86 */
+static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h)
+{
+#ifdef CONFIG_X86
+	u32 prefetch;
+
+	prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
+	prefetch |= 0x100;
+	writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
+#endif
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
 	int prod_index, err;
@@ -4169,16 +4181,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 		err = -ENODEV;
 		goto err_out_free_res;
 	}
-#ifdef CONFIG_X86
-	{
-		/* Need to enable prefetch in the SCSI core for 6400 in x86 */
-		__u32 prefetch;
-		prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
-		prefetch |= 0x100;
-		writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
-	}
-#endif
-
+	cciss_enable_scsi_prefetch(c);
 	/* Disabling DMA prefetch and refetch for the P600.
 	 * An ASIC bug may result in accesses to invalid memory addresses.
 	 * We've disabled prefetch for some time now. Testing with XEN
-- 
cgit v1.2.3


From bfd63ee571ed2a1ab7af99544e326483f84c0544 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:46 -0500
Subject: cciss: factor out cciss_p600_dma_prefetch_quirk()

cciss: factor out cciss_p600_dma_prefetch_quirk()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b4264bcda618..e1c2bf1c6d64 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4120,6 +4120,24 @@ static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h)
 #endif
 }
 
+/* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
+ * in a prefetch beyond physical memory.
+ */
+static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h)
+{
+	u32 dma_prefetch;
+	__u32 dma_refetch;
+
+	if (h->board_id != 0x3225103C)
+		return;
+	dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
+	dma_prefetch |= 0x8000;
+	writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
+	pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch);
+	dma_refetch |= 0x1;
+	pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch);
+}
+
 static int __devinit cciss_pci_init(ctlr_info_t *c)
 {
 	int prod_index, err;
@@ -4182,24 +4200,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 		goto err_out_free_res;
 	}
 	cciss_enable_scsi_prefetch(c);
-	/* Disabling DMA prefetch and refetch for the P600.
-	 * An ASIC bug may result in accesses to invalid memory addresses.
-	 * We've disabled prefetch for some time now. Testing with XEN
-	 * kernels revealed a bug in the refetch if dom0 resides on a P600.
-	 */
-	if (c->board_id == 0x3225103C) {
-		__u32 dma_prefetch;
-		__u32 dma_refetch;
-		dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
-		dma_prefetch |= 0x8000;
-		writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
-		pci_read_config_dword(c->pdev, PCI_COMMAND_PARITY,
-			&dma_refetch);
-		dma_refetch |= 0x1;
-		pci_write_config_dword(c->pdev, PCI_COMMAND_PARITY,
-			dma_refetch);
-	}
-
+	cciss_p600_dma_prefetch_quirk(c);
 #ifdef CCISS_DEBUG
 	printk(KERN_WARNING "Trying to put board into Performant mode\n");
 #endif				/* CCISS_DEBUG */
-- 
cgit v1.2.3


From ff5f58f06deb3f7b9a865093d7f580bbc2b9b498 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:51 -0500
Subject: cciss: cleanup some debug ifdefs

cciss: cleanup some debug ifdefs

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index e1c2bf1c6d64..10502a200226 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3711,9 +3711,9 @@ static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
  *   the io functions.
  *   This is for debug only.
  */
-#ifdef CCISS_DEBUG
 static void print_cfg_table(CfgTable_struct *tb)
 {
+#ifdef CCISS_DEBUG
 	int i;
 	char temp_name[17];
 
@@ -3742,8 +3742,8 @@ static void print_cfg_table(CfgTable_struct *tb)
 	temp_name[16] = '\0';
 	printk("   Server Name = %s\n", temp_name);
 	printk("   Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
-}
 #endif				/* CCISS_DEBUG */
+}
 
 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
 {
@@ -3833,6 +3833,7 @@ cciss_put_controller_into_performant_mode(ctlr_info_t *h)
 
 	BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
 
+	dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
 	/* Attempt to put controller into performant mode if supported */
 	/* Does board support performant mode? */
 	trans_support = readl(&(h->cfgtable->TransportSupport));
@@ -4190,9 +4191,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	err = cciss_find_cfgtables(c);
 	if (err)
 		goto err_out_free_res;
-#ifdef CCISS_DEBUG
 	print_cfg_table(c->cfgtable);
-#endif				/* CCISS_DEBUG */
 	cciss_find_board_params(c);
 
 	if (!CISS_signature_present(c)) {
@@ -4201,9 +4200,6 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 	}
 	cciss_enable_scsi_prefetch(c);
 	cciss_p600_dma_prefetch_quirk(c);
-#ifdef CCISS_DEBUG
-	printk(KERN_WARNING "Trying to put board into Performant mode\n");
-#endif				/* CCISS_DEBUG */
 	cciss_put_controller_into_performant_mode(c);
 	return 0;
 
-- 
cgit v1.2.3


From fe3b7527dbf1e717ccb3492bb2d84481ca7be6f9 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:45:56 -0500
Subject: cciss: make cciss_put_controller_into_performant_mode as __devinit

cciss: make cciss_put_controller_into_performant_mode as __devinit

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 10502a200226..37bc091041a0 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3816,8 +3816,7 @@ static void  calc_bucket_map(int bucket[], int num_buckets,
 	}
 }
 
-static void
-cciss_put_controller_into_performant_mode(ctlr_info_t *h)
+static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
 {
 	int l = 0;
 	__u32 trans_support;
-- 
cgit v1.2.3


From 0f8a6a1e7b7162a51daee7df28f1b898da1a4165 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:01 -0500
Subject: cciss: factor out cciss_wait_for_mode_change_ack()

cciss: factor out cciss_wait_for_mode_change_ack()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 37bc091041a0..ee7cfde8a145 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3816,9 +3816,22 @@ static void  calc_bucket_map(int bucket[], int num_buckets,
 	}
 }
 
+static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h)
+{
+	int i;
+
+	/* under certain very rare conditions, this can take awhile.
+	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
+	 * as we enter this code.) */
+	for (i = 0; i < MAX_CONFIG_WAIT; i++) {
+		if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
+			break;
+		msleep(10);
+	}
+}
+
 static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
 {
-	int l = 0;
 	__u32 trans_support;
 	__u32 trans_offset;
 			/*
@@ -3895,17 +3908,7 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
 
 	h->transMethod = CFGTBL_Trans_Performant;
 	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
-	/* under certain very rare conditions, this can take awhile.
-	 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
-	 * as we enter this code.) */
-	for (l = 0; l < MAX_CONFIG_WAIT; l++) {
-		register_value = readl(h->vaddr + SA5_DOORBELL);
-		if (!(register_value & CFGTBL_ChangeReq))
-			break;
-		/* delay and try again */
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(10);
-	}
+	cciss_wait_for_mode_change_ack(h);
 	register_value = readl(&(h->cfgtable->TransportActive));
 	if (!(register_value & CFGTBL_Trans_Performant)) {
 		printk(KERN_WARNING "cciss: unable to get board into"
-- 
cgit v1.2.3


From b993313540de341e4c4df8f529d585e9400f43bd Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:07 -0500
Subject: cciss: factor out cciss_enter_performant_mode

cciss: factor out cciss_enter_performant_mode

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 98 +++++++++++++++++++++++++++++++--------------------
 1 file changed, 59 insertions(+), 39 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index ee7cfde8a145..17e420c13b36 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3830,54 +3830,36 @@ static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h)
 	}
 }
 
-static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
+static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
 {
-	__u32 trans_support;
+	/* This is a bit complicated.  There are 8 registers on
+	 * the controller which we write to to tell it 8 different
+	 * sizes of commands which there may be.  It's a way of
+	 * reducing the DMA done to fetch each command.  Encoded into
+	 * each command's tag are 3 bits which communicate to the controller
+	 * which of the eight sizes that command fits within.  The size of
+	 * each command depends on how many scatter gather entries there are.
+	 * Each SG entry requires 16 bytes.  The eight registers are programmed
+	 * with the number of 16-byte blocks a command of that size requires.
+	 * The smallest command possible requires 5 such 16 byte blocks.
+	 * the largest command possible requires MAXSGENTRIES + 4 16-byte
+	 * blocks.  Note, this only extends to the SG entries contained
+	 * within the command block, and does not extend to chained blocks
+	 * of SG elements.   bft[] contains the eight values we write to
+	 * the registers.  They are not evenly distributed, but have more
+	 * sizes for small commands, and fewer sizes for larger commands.
+	 */
 	__u32 trans_offset;
+	int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
 			/*
 			 *  5 = 1 s/g entry or 4k
 			 *  6 = 2 s/g entry or 8k
 			 *  8 = 4 s/g entry or 16k
 			 * 10 = 6 s/g entry or 24k
 			 */
-	int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
 	unsigned long register_value;
-
 	BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
 
-	dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
-	/* Attempt to put controller into performant mode if supported */
-	/* Does board support performant mode? */
-	trans_support = readl(&(h->cfgtable->TransportSupport));
-	if (!(trans_support & PERFORMANT_MODE))
-		return;
-
-	printk(KERN_WARNING "cciss%d: Placing controller into "
-				"performant mode\n", h->ctlr);
-	/* Performant mode demands commands on a 32 byte boundary
-	 * pci_alloc_consistent aligns on page boundarys already.
-	 * Just need to check if divisible by 32
-	 */
-	if ((sizeof(CommandList_struct) % 32) != 0) {
-		printk(KERN_WARNING "%s %d %s\n",
-			"cciss info: command size[",
-			(int)sizeof(CommandList_struct),
-			"] not divisible by 32, no performant mode..\n");
-		return;
-	}
-
-	/* Performant mode ring buffer and supporting data structures */
-	h->reply_pool = (__u64 *)pci_alloc_consistent(
-		h->pdev, h->max_commands * sizeof(__u64),
-		&(h->reply_pool_dhandle));
-
-	/* Need a block fetch table for performant mode */
-	h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
-		sizeof(__u32)), GFP_KERNEL);
-
-	if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
-		goto clean_up;
-
 	h->reply_pool_wraparound = 1; /* spec: init to 1 */
 
 	/* Controller spec: zero out this buffer. */
@@ -3906,18 +3888,56 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
 	writel(CFGTBL_Trans_Performant,
 			&(h->cfgtable->HostWrite.TransportRequest));
 
-	h->transMethod = CFGTBL_Trans_Performant;
 	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
 	cciss_wait_for_mode_change_ack(h);
 	register_value = readl(&(h->cfgtable->TransportActive));
-	if (!(register_value & CFGTBL_Trans_Performant)) {
+	if (!(register_value & CFGTBL_Trans_Performant))
 		printk(KERN_WARNING "cciss: unable to get board into"
 					" performant mode\n");
+}
+
+static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
+{
+	__u32 trans_support;
+
+	dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
+	/* Attempt to put controller into performant mode if supported */
+	/* Does board support performant mode? */
+	trans_support = readl(&(h->cfgtable->TransportSupport));
+	if (!(trans_support & PERFORMANT_MODE))
+		return;
+
+	printk(KERN_WARNING "cciss%d: Placing controller into "
+				"performant mode\n", h->ctlr);
+	/* Performant mode demands commands on a 32 byte boundary
+	 * pci_alloc_consistent aligns on page boundarys already.
+	 * Just need to check if divisible by 32
+	 */
+	if ((sizeof(CommandList_struct) % 32) != 0) {
+		printk(KERN_WARNING "%s %d %s\n",
+			"cciss info: command size[",
+			(int)sizeof(CommandList_struct),
+			"] not divisible by 32, no performant mode..\n");
 		return;
 	}
 
+	/* Performant mode ring buffer and supporting data structures */
+	h->reply_pool = (__u64 *)pci_alloc_consistent(
+		h->pdev, h->max_commands * sizeof(__u64),
+		&(h->reply_pool_dhandle));
+
+	/* Need a block fetch table for performant mode */
+	h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
+		sizeof(__u32)), GFP_KERNEL);
+
+	if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
+		goto clean_up;
+
+	cciss_enter_performant_mode(h);
+
 	/* Change the access methods to the performant access methods */
 	h->access = SA5_performant_access;
+	h->transMethod = CFGTBL_Trans_Performant;
 
 	return;
 clean_up:
-- 
cgit v1.2.3


From 8e93bf6d6c9c6d864c17b7743f2cc5f2e052fe46 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:12 -0500
Subject: cciss: factor out cciss_find_cfg_addrs.

Rationale for this is that I will also need to use this code
in fixing kdump host reset code prior to having the hba structure.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 35 +++++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 12 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 17e420c13b36..3cd8397f82bd 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4064,29 +4064,40 @@ static int __devinit cciss_wait_for_board_ready(ctlr_info_t *h)
 	return -ENODEV;
 }
 
+static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
+	void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
+	u64 *cfg_offset)
+{
+	*cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
+	*cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
+	*cfg_base_addr &= (u32) 0x0000ffff;
+	*cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
+	if (*cfg_base_addr_index == -1) {
+		dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, "
+			"*cfg_base_addr = 0x%08x\n", *cfg_base_addr);
+		return -ENODEV;
+	}
+	return 0;
+}
+
 static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
 {
 	u64 cfg_offset;
 	u32 cfg_base_addr;
 	u64 cfg_base_addr_index;
 	u32 trans_offset;
+	int rc;
 
-	/* get the address index number */
-	cfg_base_addr = readl(h->vaddr + SA5_CTCFG_OFFSET);
-	cfg_base_addr &= (u32) 0x0000ffff;
-	cfg_base_addr_index = find_PCI_BAR_index(h->pdev, cfg_base_addr);
-	if (cfg_base_addr_index == -1) {
-		dev_warn(&h->pdev->dev, "cannot find cfg_base_addr_index\n");
-		return -ENODEV;
-	}
-	cfg_offset = readl(h->vaddr + SA5_CTMEM_OFFSET);
+	rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
+		&cfg_base_addr_index, &cfg_offset);
+	if (rc)
+		return rc;
 	h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
-			       cfg_base_addr_index) + cfg_offset,
-				sizeof(h->cfgtable));
+		cfg_base_addr_index) + cfg_offset, sizeof(h->cfgtable));
 	if (!h->cfgtable)
 		return -ENOMEM;
 	/* Find performant mode table. */
-	trans_offset = readl(&(h->cfgtable->TransMethodOffset));
+	trans_offset = readl(&h->cfgtable->TransMethodOffset);
 	h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
 				cfg_base_addr_index)+cfg_offset+trans_offset,
 				sizeof(*h->transtable));
-- 
cgit v1.2.3


From 83123cb11b5a5205233c59357da2c8d9a8dc9d24 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:17 -0500
Subject: cciss: factor out cciss_reset_devices()

cciss: factor out cciss_reset_devices()

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 51 +++++++++++++++++++++++++++++++--------------------
 drivers/block/cciss.h |  3 +++
 2 files changed, 34 insertions(+), 20 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 3cd8397f82bd..f49dcd734d1b 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4486,6 +4486,34 @@ static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
 	return 0;
 }
 
+static __devinit int cciss_init_reset_devices(struct pci_dev *pdev)
+{
+	int i;
+
+	if (!reset_devices)
+		return 0;
+
+	/* Reset the controller with a PCI power-cycle */
+	if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
+		return -ENODEV;
+
+	/* Some devices (notably the HP Smart Array 5i Controller)
+	   need a little pause here */
+	msleep(CCISS_POST_RESET_PAUSE_MSECS);
+
+	/* Now try to get the controller to respond to a no-op */
+	for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
+		if (cciss_noop(pdev) == 0)
+			break;
+		else
+			dev_warn(&pdev->dev, "no-op failed%s\n",
+				(i < CCISS_POST_RESET_NOOP_RETRIES - 1 ?
+					"; re-trying" : ""));
+		msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS);
+	}
+	return 0;
+}
+
 /*
  *  This is it.  Find all the controllers and register them.  I really hate
  *  stealing all these major device numbers.
@@ -4501,26 +4529,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	int dac, return_code;
 	InquiryData_struct *inq_buff;
 
-	if (reset_devices) {
-		/* Reset the controller with a PCI power-cycle */
-		if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
-			return -ENODEV;
-
-		/* Now try to get the controller to respond to a no-op. Some
-		   devices (notably the HP Smart Array 5i Controller) need
-		   up to 30 seconds to respond. */
-		for (i=0; i<30; i++) {
-			if (cciss_noop(pdev) == 0)
-				break;
-
-			schedule_timeout_uninterruptible(HZ);
-		}
-		if (i == 30) {
-			printk(KERN_ERR "cciss: controller seems dead\n");
-			return -EBUSY;
-		}
-	}
-
+	rc = cciss_init_reset_devices(pdev);
+	if (rc)
+		return rc;
 	i = alloc_cciss_hba();
 	if (i < 0)
 		return -1;
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index c2ef9dd56c45..4290b7f0f639 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -204,6 +204,9 @@ struct ctlr_info
 #define CCISS_BOARD_READY_ITERATIONS \
 	((CCISS_BOARD_READY_WAIT_SECS * 1000) / \
 		CCISS_BOARD_READY_POLL_INTERVAL_MSECS)
+#define CCISS_POST_RESET_PAUSE_MSECS (3000)
+#define CCISS_POST_RESET_NOOP_INTERVAL_MSECS (1000)
+#define CCISS_POST_RESET_NOOP_RETRIES (12)
 
 /* 
 	Send the command to the hardware 
-- 
cgit v1.2.3


From a6528d017234b483283274fbdd360f3541befe19 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:22 -0500
Subject: cciss: fix hard reset code.

cciss: Fix hard reset code.
Smart Array controllers newer than the P600 do not honor the
PCI power state method of resetting the controllers.  Instead,
in these cases we can get them to reset via the "doorbell" register.

This escaped notice until we began using "performant" mode because
the fact that the controllers did not reset did not normally
impede subsequent operation, and so things generally appeared to
"work".  Once the performant mode code was added, if the controller
does not reset, it remains in performant mode.  The code immediately
after the reset presumes the controller is in "simple" mode
(which previously, it had remained in simple mode the whole time).
If the controller remains in performant mode any code which presumes
it is in simple mode will not work.  So the reset needs to be fixed.

Unfortunately there are some controllers which cannot be reset by
either method. (eg. p800).  We detect these cases by noticing that
the controller seems to remain in performant mode even after a
reset has been attempted.  In those cases we ignore the controller,
as any commands outstanding on it will result in stale completions.
To sum up, we try to do a better job of resetting the controller if
"reset_devices" is set, and if it doesn't work, we ignore that
controller.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c     | 200 ++++++++++++++++++++++++++++++++++------------
 drivers/block/cciss_cmd.h |   4 +
 2 files changed, 152 insertions(+), 52 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index f49dcd734d1b..b3060eced553 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -216,6 +216,12 @@ static void cciss_device_release(struct device *dev);
 static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
 static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
 static inline u32 next_command(ctlr_info_t *h);
+static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
+	void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index,
+	u64 *cfg_offset);
+static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
+	unsigned long *memory_bar);
+
 
 /* performant mode helper functions */
 static void  calc_bucket_map(int *bucket, int num_buckets, int nsgs,
@@ -4413,68 +4419,130 @@ static __devinit int cciss_reset_msi(struct pci_dev *pdev)
 	return 0;
 }
 
-/* This does a hard reset of the controller using PCI power management
- * states. */
-static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
+static int cciss_controller_hard_reset(struct pci_dev *pdev,
+	void * __iomem vaddr, bool use_doorbell)
 {
-	u16 pmcsr, saved_config_space[32];
-	int i, pos;
+	u16 pmcsr;
+	int pos;
 
-	printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
+	if (use_doorbell) {
+		/* For everything after the P600, the PCI power state method
+		 * of resetting the controller doesn't work, so we have this
+		 * other way using the doorbell register.
+		 */
+		dev_info(&pdev->dev, "using doorbell to reset controller\n");
+		writel(DOORBELL_CTLR_RESET, vaddr + SA5_DOORBELL);
+		msleep(1000);
+	} else { /* Try to do it the PCI power state way */
+
+		/* Quoting from the Open CISS Specification: "The Power
+		 * Management Control/Status Register (CSR) controls the power
+		 * state of the device.  The normal operating state is D0,
+		 * CSR=00h.  The software off state is D3, CSR=03h.  To reset
+		 * the controller, place the interface device in D3 then to D0,
+		 * this causes a secondary PCI reset which will reset the
+		 * controller." */
+
+		pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
+		if (pos == 0) {
+			dev_err(&pdev->dev,
+				"cciss_controller_hard_reset: "
+				"PCI PM not supported\n");
+			return -ENODEV;
+		}
+		dev_info(&pdev->dev, "using PCI PM to reset controller\n");
+		/* enter the D3hot power management state */
+		pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
+		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
+		pmcsr |= PCI_D3hot;
+		pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
 
-	/* This is very nearly the same thing as
+		msleep(500);
 
-	   pci_save_state(pci_dev);
-	   pci_set_power_state(pci_dev, PCI_D3hot);
-	   pci_set_power_state(pci_dev, PCI_D0);
-	   pci_restore_state(pci_dev);
+		/* enter the D0 power management state */
+		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
+		pmcsr |= PCI_D0;
+		pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
 
-	   but we can't use these nice canned kernel routines on
-	   kexec, because they also check the MSI/MSI-X state in PCI
-	   configuration space and do the wrong thing when it is
-	   set/cleared.  Also, the pci_save/restore_state functions
-	   violate the ordering requirements for restoring the
-	   configuration space from the CCISS document (see the
-	   comment below).  So we roll our own .... */
+		msleep(500);
+	}
+	return 0;
+}
+
+/* This does a hard reset of the controller using PCI power management
+ * states or using the doorbell register. */
+static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
+{
+	u16 saved_config_space[32];
+	u64 cfg_offset;
+	u32 cfg_base_addr;
+	u64 cfg_base_addr_index;
+	void __iomem *vaddr;
+	unsigned long paddr;
+	u32 misc_fw_support, active_transport;
+	int rc, i;
+	CfgTable_struct __iomem *cfgtable;
+	bool use_doorbell;
+
+	/* For controllers as old a the p600, this is very nearly
+	 * the same thing as
+	 *
+	 * pci_save_state(pci_dev);
+	 * pci_set_power_state(pci_dev, PCI_D3hot);
+	 * pci_set_power_state(pci_dev, PCI_D0);
+	 * pci_restore_state(pci_dev);
+	 *
+	 * but we can't use these nice canned kernel routines on
+	 * kexec, because they also check the MSI/MSI-X state in PCI
+	 * configuration space and do the wrong thing when it is
+	 * set/cleared.  Also, the pci_save/restore_state functions
+	 * violate the ordering requirements for restoring the
+	 * configuration space from the CCISS document (see the
+	 * comment below).  So we roll our own ....
+	 *
+	 * For controllers newer than the P600, the pci power state
+	 * method of resetting doesn't work so we have another way
+	 * using the doorbell register.
+	 */
 
 	for (i = 0; i < 32; i++)
 		pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
 
-	pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
-	if (pos == 0) {
-		printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
-		return -ENODEV;
-	}
-
-	/* Quoting from the Open CISS Specification: "The Power
-	 * Management Control/Status Register (CSR) controls the power
-	 * state of the device.  The normal operating state is D0,
-	 * CSR=00h.  The software off state is D3, CSR=03h.  To reset
-	 * the controller, place the interface device in D3 then to
-	 * D0, this causes a secondary PCI reset which will reset the
-	 * controller." */
-
-	/* enter the D3hot power management state */
-	pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
-	pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
-	pmcsr |= PCI_D3hot;
-	pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
+	/* find the first memory BAR, so we can find the cfg table */
+	rc = cciss_pci_find_memory_BAR(pdev, &paddr);
+	if (rc)
+		return rc;
+	vaddr = remap_pci_mem(paddr, 0x250);
+	if (!vaddr)
+		return -ENOMEM;
 
-	schedule_timeout_uninterruptible(HZ >> 1);
+	/* find cfgtable in order to check if reset via doorbell is supported */
+	rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
+					&cfg_base_addr_index, &cfg_offset);
+	if (rc)
+		goto unmap_vaddr;
+	cfgtable = remap_pci_mem(pci_resource_start(pdev,
+		       cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
+	if (!cfgtable) {
+		rc = -ENOMEM;
+		goto unmap_vaddr;
+	}
 
-	/* enter the D0 power management state */
-	pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
-	pmcsr |= PCI_D0;
-	pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
+	/* If reset via doorbell register is supported, use that. */
+	misc_fw_support = readl(&cfgtable->misc_fw_support);
+	use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
 
-	schedule_timeout_uninterruptible(HZ >> 1);
+	rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell);
+	if (rc)
+		goto unmap_cfgtable;
 
 	/* Restore the PCI configuration space.  The Open CISS
 	 * Specification says, "Restore the PCI Configuration
 	 * Registers, offsets 00h through 60h. It is important to
 	 * restore the command register, 16-bits at offset 04h,
 	 * last. Do not restore the configuration status register,
-	 * 16-bits at offset 06h."  Note that the offset is 2*i. */
+	 * 16-bits at offset 06h."  Note that the offset is 2*i.
+	 */
 	for (i = 0; i < 32; i++) {
 		if (i == 2 || i == 3)
 			continue;
@@ -4483,23 +4551,51 @@ static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
 	wmb();
 	pci_write_config_word(pdev, 4, saved_config_space[2]);
 
-	return 0;
+	/* Some devices (notably the HP Smart Array 5i Controller)
+	   need a little pause here */
+	msleep(CCISS_POST_RESET_PAUSE_MSECS);
+
+	/* Controller should be in simple mode at this point.  If it's not,
+	 * It means we're on one of those controllers which doesn't support
+	 * the doorbell reset method and on which the PCI power management reset
+	 * method doesn't work (P800, for example.)
+	 * In those cases, don't try to proceed, as it generally doesn't work.
+	 */
+	active_transport = readl(&cfgtable->TransportActive);
+	if (active_transport & PERFORMANT_MODE) {
+		dev_warn(&pdev->dev, "Unable to successfully reset controller,"
+			" Ignoring controller.\n");
+		rc = -ENODEV;
+	}
+
+unmap_cfgtable:
+	iounmap(cfgtable);
+
+unmap_vaddr:
+	iounmap(vaddr);
+	return rc;
 }
 
 static __devinit int cciss_init_reset_devices(struct pci_dev *pdev)
 {
-	int i;
+	int rc, i;
 
 	if (!reset_devices)
 		return 0;
 
-	/* Reset the controller with a PCI power-cycle */
-	if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
-		return -ENODEV;
+	/* Reset the controller with a PCI power-cycle or via doorbell */
+	rc = cciss_kdump_hard_reset_controller(pdev);
 
-	/* Some devices (notably the HP Smart Array 5i Controller)
-	   need a little pause here */
-	msleep(CCISS_POST_RESET_PAUSE_MSECS);
+	/* -ENOTSUPP here means we cannot reset the controller
+	 * but it's already (and still) up and running in
+	 * "performant mode".
+	 */
+	if (rc == -ENOTSUPP)
+		return 0; /* just try to do the kdump anyhow. */
+	if (rc)
+		return -ENODEV;
+	if (cciss_reset_msi(pdev))
+		return -ENODEV;
 
 	/* Now try to get the controller to respond to a no-op */
 	for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
diff --git a/drivers/block/cciss_cmd.h b/drivers/block/cciss_cmd.h
index 936b9666da6a..eb060f1b00b6 100644
--- a/drivers/block/cciss_cmd.h
+++ b/drivers/block/cciss_cmd.h
@@ -52,6 +52,7 @@
 /* Configuration Table */
 #define CFGTBL_ChangeReq        0x00000001l
 #define CFGTBL_AccCmds          0x00000001l
+#define DOORBELL_CTLR_RESET     0x00000004l
 
 #define CFGTBL_Trans_Simple     0x00000002l
 #define CFGTBL_Trans_Performant 0x00000004l
@@ -230,6 +231,9 @@ typedef struct _CfgTable_struct {
   DWORD            MaxPhysicalDrives;
   DWORD            MaxPhysicalDrivesPerLogicalUnit;
   DWORD            MaxPerformantModeCommands;
+  u8		   reserved[0x78 - 0x58];
+  u32		   misc_fw_support; /* offset 0x78 */
+#define MISC_FW_DOORBELL_RESET (0x02)
 } CfgTable_struct;
 
 struct TransTable_struct {
-- 
cgit v1.2.3


From adfbc1ff342ece2e482254bcc5381fadfffbbb89 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:28 -0500
Subject: cciss: sanitize max commands

cciss: sanitize max commands
Some controllers might try to tell us they support 0 commands
in performant mode.  This is a lie told by buggy firmware.
We have to be wary of this lest we try to allocate a negative
number of command blocks, which will be treated as unsigned,
and get an out of memory condition.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b3060eced553..6d4c4f227d55 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4112,13 +4112,25 @@ static int __devinit cciss_find_cfgtables(ctlr_info_t *h)
 	return 0;
 }
 
+static void __devinit cciss_get_max_perf_mode_cmds(struct ctlr_info *h)
+{
+	h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
+	if (h->max_commands < 16) {
+		dev_warn(&h->pdev->dev, "Controller reports "
+			"max supported commands of %d, an obvious lie. "
+			"Using 16.  Ensure that firmware is up to date.\n",
+			h->max_commands);
+		h->max_commands = 16;
+	}
+}
+
 /* Interrogate the hardware for some limits:
  * max commands, max SG elements without chaining, and with chaining,
  * SG chain block size, etc.
  */
 static void __devinit cciss_find_board_params(ctlr_info_t *h)
 {
-	h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
+	cciss_get_max_perf_mode_cmds(h);
 	h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
 	h->maxsgentries = readl(&(h->cfgtable->MaxSGElements));
 	/*
-- 
cgit v1.2.3


From 058a0f9f31283d5eb9d8686d3b4f69e55d1589f1 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:33 -0500
Subject: cciss: forbid hard reset of 640x boards

cciss: forbid hard reset of 640x boards
The 6402/6404 are two PCI devices -- two Smart Array controllers
-- that fit into one slot.  It is possible to reset them independently,
however, they share a battery backed cache module.  One of the pair
controls the cache and the 2nd one access the cache through the first
one.  If you reset the one controlling the cache, the other one will
not be a happy camper.  So we just forbid resetting this conjoined
mess.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 6d4c4f227d55..2abe6df9445e 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -4495,6 +4495,7 @@ static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
 	int rc, i;
 	CfgTable_struct __iomem *cfgtable;
 	bool use_doorbell;
+	u32 board_id;
 
 	/* For controllers as old a the p600, this is very nearly
 	 * the same thing as
@@ -4517,6 +4518,19 @@ static __devinit int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
 	 * using the doorbell register.
 	 */
 
+	/* Exclude 640x boards.  These are two pci devices in one slot
+	 * which share a battery backed cache module.  One controls the
+	 * cache, the other accesses the cache through the one that controls
+	 * it.  If we reset the one controlling the cache, the other will
+	 * likely not be happy.  Just forbid resetting this conjoined mess.
+	 */
+	cciss_lookup_board_id(pdev, &board_id);
+	if (board_id == 0x409C0E11 || board_id == 0x409D0E11) {
+		dev_warn(&pdev->dev, "Cannot reset Smart Array 640x "
+				"due to shared cache module.");
+		return -ENODEV;
+	}
+
 	for (i = 0; i < 32; i++)
 		pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
 
@@ -4600,7 +4614,8 @@ static __devinit int cciss_init_reset_devices(struct pci_dev *pdev)
 
 	/* -ENOTSUPP here means we cannot reset the controller
 	 * but it's already (and still) up and running in
-	 * "performant mode".
+	 * "performant mode".  Or, it might be 640x, which can't reset
+	 * due to concerns about shared bbwc between 6402/6404 pair.
 	 */
 	if (rc == -ENOTSUPP)
 		return 0; /* just try to do the kdump anyhow. */
-- 
cgit v1.2.3


From f70dba83669bf718c2f1731f0f58b8149e883593 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:38 -0500
Subject: cciss: use consistent variable names

cciss: use consistent variable names
"h", for the hba structure and "c" for the command structures.
and get rid of trivial CCISS_LOCK macro.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c      | 611 ++++++++++++++++++++++-----------------------
 drivers/block/cciss.h      |   2 -
 drivers/block/cciss_scsi.c | 591 +++++++++++++++++++++----------------------
 3 files changed, 592 insertions(+), 612 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 2abe6df9445e..70ad24f3604f 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -191,17 +191,17 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
 static int deregister_disk(ctlr_info_t *h, int drv_index,
 			   int clear_all, int via_ioctl);
 
-static void cciss_read_capacity(int ctlr, int logvol,
+static void cciss_read_capacity(ctlr_info_t *h, int logvol,
 			sector_t *total_size, unsigned int *block_size);
-static void cciss_read_capacity_16(int ctlr, int logvol,
+static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
 			sector_t *total_size, unsigned int *block_size);
-static void cciss_geometry_inquiry(int ctlr, int logvol,
+static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
 			sector_t total_size,
 			unsigned int block_size, InquiryData_struct *inq_buff,
 				   drive_info_struct *drv);
 static void __devinit cciss_interrupt_mode(ctlr_info_t *);
 static void start_io(ctlr_info_t *h);
-static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
+static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
 			__u8 page_code, unsigned char scsi3addr[],
 			int cmd_type);
 static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
@@ -229,9 +229,9 @@ static void  calc_bucket_map(int *bucket, int num_buckets, int nsgs,
 static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
 
 #ifdef CONFIG_PROC_FS
-static void cciss_procinit(int i);
+static void cciss_procinit(ctlr_info_t *h);
 #else
-static void cciss_procinit(int i)
+static void cciss_procinit(ctlr_info_t *h)
 {
 }
 #endif				/* CONFIG_PROC_FS */
@@ -416,26 +416,25 @@ static void cciss_seq_show_header(struct seq_file *seq)
 		h->maxQsinceinit, h->max_outstanding, h->maxSG);
 
 #ifdef CONFIG_CISS_SCSI_TAPE
-	cciss_seq_tape_report(seq, h->ctlr);
+	cciss_seq_tape_report(seq, h);
 #endif /* CONFIG_CISS_SCSI_TAPE */
 }
 
 static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	ctlr_info_t *h = seq->private;
-	unsigned ctlr = h->ctlr;
 	unsigned long flags;
 
 	/* prevent displaying bogus info during configuration
 	 * or deconfiguration of a logical volume
 	 */
-	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring) {
-		spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return ERR_PTR(-EBUSY);
 	}
 	h->busy_configuring = 1;
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 
 	if (*pos == 0)
 		cciss_seq_show_header(seq);
@@ -543,7 +542,7 @@ cciss_proc_write(struct file *file, const char __user *buf,
 		struct seq_file *seq = file->private_data;
 		ctlr_info_t *h = seq->private;
 
-		err = cciss_engage_scsi(h->ctlr);
+		err = cciss_engage_scsi(h);
 		if (err == 0)
 			err = length;
 	} else
@@ -566,7 +565,7 @@ static const struct file_operations cciss_proc_fops = {
 	.write	 = cciss_proc_write,
 };
 
-static void __devinit cciss_procinit(int i)
+static void __devinit cciss_procinit(ctlr_info_t *h)
 {
 	struct proc_dir_entry *pde;
 
@@ -574,9 +573,9 @@ static void __devinit cciss_procinit(int i)
 		proc_cciss = proc_mkdir("driver/cciss", NULL);
 	if (!proc_cciss)
 		return;
-	pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
+	pde = proc_create_data(h->devname, S_IWUSR | S_IRUSR | S_IRGRP |
 					S_IROTH, proc_cciss,
-					&cciss_proc_fops, hba[i]);
+					&cciss_proc_fops, h);
 }
 #endif				/* CONFIG_PROC_FS */
 
@@ -609,12 +608,12 @@ static ssize_t dev_show_unique_id(struct device *dev,
 	unsigned long flags;
 	int ret = 0;
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring)
 		ret = -EBUSY;
 	else
 		memcpy(sn, drv->serial_no, sizeof(sn));
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 
 	if (ret)
 		return ret;
@@ -639,12 +638,12 @@ static ssize_t dev_show_vendor(struct device *dev,
 	unsigned long flags;
 	int ret = 0;
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring)
 		ret = -EBUSY;
 	else
 		memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 
 	if (ret)
 		return ret;
@@ -663,12 +662,12 @@ static ssize_t dev_show_model(struct device *dev,
 	unsigned long flags;
 	int ret = 0;
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring)
 		ret = -EBUSY;
 	else
 		memcpy(model, drv->model, MODEL_LEN + 1);
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 
 	if (ret)
 		return ret;
@@ -687,12 +686,12 @@ static ssize_t dev_show_rev(struct device *dev,
 	unsigned long flags;
 	int ret = 0;
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring)
 		ret = -EBUSY;
 	else
 		memcpy(rev, drv->rev, REV_LEN + 1);
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 
 	if (ret)
 		return ret;
@@ -709,17 +708,17 @@ static ssize_t cciss_show_lunid(struct device *dev,
 	unsigned long flags;
 	unsigned char lunid[8];
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring) {
-		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return -EBUSY;
 	}
 	if (!drv->heads) {
-		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return -ENOTTY;
 	}
 	memcpy(lunid, drv->LunID, sizeof(lunid));
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 	return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 		lunid[0], lunid[1], lunid[2], lunid[3],
 		lunid[4], lunid[5], lunid[6], lunid[7]);
@@ -734,13 +733,13 @@ static ssize_t cciss_show_raid_level(struct device *dev,
 	int raid;
 	unsigned long flags;
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring) {
-		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return -EBUSY;
 	}
 	raid = drv->raid_level;
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 	if (raid < 0 || raid > RAID_UNKNOWN)
 		raid = RAID_UNKNOWN;
 
@@ -757,13 +756,13 @@ static ssize_t cciss_show_usage_count(struct device *dev,
 	unsigned long flags;
 	int count;
 
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring) {
-		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return -EBUSY;
 	}
 	count = drv->usage_count;
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 	return snprintf(buf, 20, "%d\n", count);
 }
 static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
@@ -1012,7 +1011,7 @@ static inline drive_info_struct *get_drv(struct gendisk *disk)
  */
 static int cciss_open(struct block_device *bdev, fmode_t mode)
 {
-	ctlr_info_t *host = get_host(bdev->bd_disk);
+	ctlr_info_t *h = get_host(bdev->bd_disk);
 	drive_info_struct *drv = get_drv(bdev->bd_disk);
 
 #ifdef CCISS_DEBUG
@@ -1044,7 +1043,7 @@ static int cciss_open(struct block_device *bdev, fmode_t mode)
 			return -EPERM;
 	}
 	drv->usage_count++;
-	host->usage_count++;
+	h->usage_count++;
 	return 0;
 }
 
@@ -1064,11 +1063,11 @@ static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
  */
 static int cciss_release(struct gendisk *disk, fmode_t mode)
 {
-	ctlr_info_t *host;
+	ctlr_info_t *h;
 	drive_info_struct *drv;
 
 	lock_kernel();
-	host = get_host(disk);
+	h = get_host(disk);
 	drv = get_drv(disk);
 
 #ifdef CCISS_DEBUG
@@ -1076,7 +1075,7 @@ static int cciss_release(struct gendisk *disk, fmode_t mode)
 #endif				/* CCISS_DEBUG */
 
 	drv->usage_count--;
-	host->usage_count--;
+	h->usage_count--;
 	unlock_kernel();
 	return 0;
 }
@@ -1223,11 +1222,11 @@ static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
+static void check_ioctl_unit_attention(ctlr_info_t *h, CommandList_struct *c)
 {
 	if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
 			c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
-		(void)check_for_unit_attention(host, c);
+		(void)check_for_unit_attention(h, c);
 }
 /*
  * ioctl
@@ -1236,9 +1235,8 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 		       unsigned int cmd, unsigned long arg)
 {
 	struct gendisk *disk = bdev->bd_disk;
-	ctlr_info_t *host = get_host(disk);
+	ctlr_info_t *h = get_host(disk);
 	drive_info_struct *drv = get_drv(disk);
-	int ctlr = host->ctlr;
 	void __user *argp = (void __user *)arg;
 
 #ifdef CCISS_DEBUG
@@ -1252,10 +1250,10 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 
 			if (!arg)
 				return -EINVAL;
-			pciinfo.domain = pci_domain_nr(host->pdev->bus);
-			pciinfo.bus = host->pdev->bus->number;
-			pciinfo.dev_fn = host->pdev->devfn;
-			pciinfo.board_id = host->board_id;
+			pciinfo.domain = pci_domain_nr(h->pdev->bus);
+			pciinfo.bus = h->pdev->bus->number;
+			pciinfo.dev_fn = h->pdev->devfn;
+			pciinfo.board_id = h->board_id;
 			if (copy_to_user
 			    (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
 				return -EFAULT;
@@ -1267,9 +1265,9 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			if (!arg)
 				return -EINVAL;
 			intinfo.delay =
-			    readl(&host->cfgtable->HostWrite.CoalIntDelay);
+			    readl(&h->cfgtable->HostWrite.CoalIntDelay);
 			intinfo.count =
-			    readl(&host->cfgtable->HostWrite.CoalIntCount);
+			    readl(&h->cfgtable->HostWrite.CoalIntCount);
 			if (copy_to_user
 			    (argp, &intinfo, sizeof(cciss_coalint_struct)))
 				return -EFAULT;
@@ -1293,22 +1291,22 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 //                      printk("cciss_ioctl: delay and count cannot be 0\n");
 				return -EINVAL;
 			}
-			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
+			spin_lock_irqsave(&h->lock, flags);
 			/* Update the field, and then ring the doorbell */
 			writel(intinfo.delay,
-			       &(host->cfgtable->HostWrite.CoalIntDelay));
+			       &(h->cfgtable->HostWrite.CoalIntDelay));
 			writel(intinfo.count,
-			       &(host->cfgtable->HostWrite.CoalIntCount));
-			writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
+			       &(h->cfgtable->HostWrite.CoalIntCount));
+			writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
 
 			for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
-				if (!(readl(host->vaddr + SA5_DOORBELL)
+				if (!(readl(h->vaddr + SA5_DOORBELL)
 				      & CFGTBL_ChangeReq))
 					break;
 				/* delay and try again */
 				udelay(1000);
 			}
-			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+			spin_unlock_irqrestore(&h->lock, flags);
 			if (i >= MAX_IOCTL_CONFIG_WAIT)
 				return -EAGAIN;
 			return 0;
@@ -1322,7 +1320,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				return -EINVAL;
 			for (i = 0; i < 16; i++)
 				NodeName[i] =
-				    readb(&host->cfgtable->ServerName[i]);
+				    readb(&h->cfgtable->ServerName[i]);
 			if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
 				return -EFAULT;
 			return 0;
@@ -1342,23 +1340,23 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			    (NodeName, argp, sizeof(NodeName_type)))
 				return -EFAULT;
 
-			spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
+			spin_lock_irqsave(&h->lock, flags);
 
 			/* Update the field, and then ring the doorbell */
 			for (i = 0; i < 16; i++)
 				writeb(NodeName[i],
-				       &host->cfgtable->ServerName[i]);
+				       &h->cfgtable->ServerName[i]);
 
-			writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
+			writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
 
 			for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
-				if (!(readl(host->vaddr + SA5_DOORBELL)
+				if (!(readl(h->vaddr + SA5_DOORBELL)
 				      & CFGTBL_ChangeReq))
 					break;
 				/* delay and try again */
 				udelay(1000);
 			}
-			spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+			spin_unlock_irqrestore(&h->lock, flags);
 			if (i >= MAX_IOCTL_CONFIG_WAIT)
 				return -EAGAIN;
 			return 0;
@@ -1370,7 +1368,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 
 			if (!arg)
 				return -EINVAL;
-			heartbeat = readl(&host->cfgtable->HeartBeat);
+			heartbeat = readl(&h->cfgtable->HeartBeat);
 			if (copy_to_user
 			    (argp, &heartbeat, sizeof(Heartbeat_type)))
 				return -EFAULT;
@@ -1382,7 +1380,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 
 			if (!arg)
 				return -EINVAL;
-			BusTypes = readl(&host->cfgtable->BusTypes);
+			BusTypes = readl(&h->cfgtable->BusTypes);
 			if (copy_to_user
 			    (argp, &BusTypes, sizeof(BusTypes_type)))
 				return -EFAULT;
@@ -1394,7 +1392,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 
 			if (!arg)
 				return -EINVAL;
-			memcpy(firmware, host->firm_ver, 4);
+			memcpy(firmware, h->firm_ver, 4);
 
 			if (copy_to_user
 			    (argp, firmware, sizeof(FirmwareVer_type)))
@@ -1417,7 +1415,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 	case CCISS_DEREGDISK:
 	case CCISS_REGNEWD:
 	case CCISS_REVALIDVOLS:
-		return rebuild_lun_table(host, 0, 1);
+		return rebuild_lun_table(h, 0, 1);
 
 	case CCISS_GETLUNINFO:{
 			LogvolInfo_struct luninfo;
@@ -1472,7 +1470,8 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			} else {
 				memset(buff, 0, iocommand.buf_size);
 			}
-			if ((c = cmd_alloc(host, 0)) == NULL) {
+			c = cmd_alloc(h, 0);
+			if (!c) {
 				kfree(buff);
 				return -ENOMEM;
 			}
@@ -1498,7 +1497,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 
 			/* Fill in the scatter gather information */
 			if (iocommand.buf_size > 0) {
-				temp64.val = pci_map_single(host->pdev, buff,
+				temp64.val = pci_map_single(h->pdev, buff,
 					iocommand.buf_size,
 					PCI_DMA_BIDIRECTIONAL);
 				c->SG[0].Addr.lower = temp64.val32.lower;
@@ -1508,24 +1507,24 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			}
 			c->waiting = &wait;
 
-			enqueue_cmd_and_start_io(host, c);
+			enqueue_cmd_and_start_io(h, c);
 			wait_for_completion(&wait);
 
 			/* unlock the buffers from DMA */
 			temp64.val32.lower = c->SG[0].Addr.lower;
 			temp64.val32.upper = c->SG[0].Addr.upper;
-			pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
+			pci_unmap_single(h->pdev, (dma_addr_t) temp64.val,
 					 iocommand.buf_size,
 					 PCI_DMA_BIDIRECTIONAL);
 
-			check_ioctl_unit_attention(host, c);
+			check_ioctl_unit_attention(h, c);
 
 			/* Copy the error information out */
 			iocommand.error_info = *(c->err_info);
 			if (copy_to_user
 			    (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
 				kfree(buff);
-				cmd_free(host, c, 0);
+				cmd_free(h, c, 0);
 				return -EFAULT;
 			}
 
@@ -1534,12 +1533,12 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				if (copy_to_user
 				    (iocommand.buf, buff, iocommand.buf_size)) {
 					kfree(buff);
-					cmd_free(host, c, 0);
+					cmd_free(h, c, 0);
 					return -EFAULT;
 				}
 			}
 			kfree(buff);
-			cmd_free(host, c, 0);
+			cmd_free(h, c, 0);
 			return 0;
 		}
 	case CCISS_BIG_PASSTHRU:{
@@ -1621,7 +1620,8 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				data_ptr += sz;
 				sg_used++;
 			}
-			if ((c = cmd_alloc(host, 0)) == NULL) {
+			c = cmd_alloc(h, 0);
+			if (!c) {
 				status = -ENOMEM;
 				goto cleanup1;
 			}
@@ -1642,7 +1642,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			if (ioc->buf_size > 0) {
 				for (i = 0; i < sg_used; i++) {
 					temp64.val =
-					    pci_map_single(host->pdev, buff[i],
+					    pci_map_single(h->pdev, buff[i],
 						    buff_size[i],
 						    PCI_DMA_BIDIRECTIONAL);
 					c->SG[i].Addr.lower =
@@ -1654,21 +1654,21 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				}
 			}
 			c->waiting = &wait;
-			enqueue_cmd_and_start_io(host, c);
+			enqueue_cmd_and_start_io(h, c);
 			wait_for_completion(&wait);
 			/* unlock the buffers from DMA */
 			for (i = 0; i < sg_used; i++) {
 				temp64.val32.lower = c->SG[i].Addr.lower;
 				temp64.val32.upper = c->SG[i].Addr.upper;
-				pci_unmap_single(host->pdev,
+				pci_unmap_single(h->pdev,
 					(dma_addr_t) temp64.val, buff_size[i],
 					PCI_DMA_BIDIRECTIONAL);
 			}
-			check_ioctl_unit_attention(host, c);
+			check_ioctl_unit_attention(h, c);
 			/* Copy the error information out */
 			ioc->error_info = *(c->err_info);
 			if (copy_to_user(argp, ioc, sizeof(*ioc))) {
-				cmd_free(host, c, 0);
+				cmd_free(h, c, 0);
 				status = -EFAULT;
 				goto cleanup1;
 			}
@@ -1678,14 +1678,14 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				for (i = 0; i < sg_used; i++) {
 					if (copy_to_user
 					    (ptr, buff[i], buff_size[i])) {
-						cmd_free(host, c, 0);
+						cmd_free(h, c, 0);
 						status = -EFAULT;
 						goto cleanup1;
 					}
 					ptr += buff_size[i];
 				}
 			}
-			cmd_free(host, c, 0);
+			cmd_free(h, c, 0);
 			status = 0;
 		      cleanup1:
 			if (buff) {
@@ -1773,26 +1773,26 @@ static void cciss_check_queues(ctlr_info_t *h)
 
 static void cciss_softirq_done(struct request *rq)
 {
-	CommandList_struct *cmd = rq->completion_data;
-	ctlr_info_t *h = hba[cmd->ctlr];
-	SGDescriptor_struct *curr_sg = cmd->SG;
+	CommandList_struct *c = rq->completion_data;
+	ctlr_info_t *h = hba[c->ctlr];
+	SGDescriptor_struct *curr_sg = c->SG;
 	u64bit temp64;
 	unsigned long flags;
 	int i, ddir;
 	int sg_index = 0;
 
-	if (cmd->Request.Type.Direction == XFER_READ)
+	if (c->Request.Type.Direction == XFER_READ)
 		ddir = PCI_DMA_FROMDEVICE;
 	else
 		ddir = PCI_DMA_TODEVICE;
 
 	/* command did not need to be retried */
 	/* unmap the DMA mapping for all the scatter gather elements */
-	for (i = 0; i < cmd->Header.SGList; i++) {
+	for (i = 0; i < c->Header.SGList; i++) {
 		if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
-			cciss_unmap_sg_chain_block(h, cmd);
+			cciss_unmap_sg_chain_block(h, c);
 			/* Point to the next block */
-			curr_sg = h->cmd_sg_list[cmd->cmdindex];
+			curr_sg = h->cmd_sg_list[c->cmdindex];
 			sg_index = 0;
 		}
 		temp64.val32.lower = curr_sg[sg_index].Addr.lower;
@@ -1808,12 +1808,12 @@ static void cciss_softirq_done(struct request *rq)
 
 	/* set the residual count for pc requests */
 	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
-		rq->resid_len = cmd->err_info->ResidualCnt;
+		rq->resid_len = c->err_info->ResidualCnt;
 
 	blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
 
 	spin_lock_irqsave(&h->lock, flags);
-	cmd_free(h, cmd, 1);
+	cmd_free(h, c, 1);
 	cciss_check_queues(h);
 	spin_unlock_irqrestore(&h->lock, flags);
 }
@@ -1829,7 +1829,7 @@ static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
  * via the inquiry page 0.  Model, vendor, and rev are set to empty strings if
  * they cannot be read.
  */
-static void cciss_get_device_descr(int ctlr, int logvol,
+static void cciss_get_device_descr(ctlr_info_t *h, int logvol,
 				   char *vendor, char *model, char *rev)
 {
 	int rc;
@@ -1844,8 +1844,8 @@ static void cciss_get_device_descr(int ctlr, int logvol,
 	if (!inq_buf)
 		return;
 
-	log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
-	rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf, sizeof(*inq_buf), 0,
+	log_unit_to_scsi3addr(h, scsi3addr, logvol);
+	rc = sendcmd_withirq(h, CISS_INQUIRY, inq_buf, sizeof(*inq_buf), 0,
 			scsi3addr, TYPE_CMD);
 	if (rc == IO_OK) {
 		memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
@@ -1865,7 +1865,7 @@ static void cciss_get_device_descr(int ctlr, int logvol,
  * number cannot be had, for whatever reason, 16 bytes of 0xff
  * are returned instead.
  */
-static void cciss_get_serial_no(int ctlr, int logvol,
+static void cciss_get_serial_no(ctlr_info_t *h, int logvol,
 				unsigned char *serial_no, int buflen)
 {
 #define PAGE_83_INQ_BYTES 64
@@ -1880,8 +1880,8 @@ static void cciss_get_serial_no(int ctlr, int logvol,
 	if (!buf)
 		return;
 	memset(serial_no, 0, buflen);
-	log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
-	rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
+	log_unit_to_scsi3addr(h, scsi3addr, logvol);
+	rc = sendcmd_withirq(h, CISS_INQUIRY, buf,
 		PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
 	if (rc == IO_OK)
 		memcpy(serial_no, &buf[8], buflen);
@@ -1947,10 +1947,9 @@ init_queue_failure:
  * is also the controller node.  Any changes to disk 0 will show up on
  * the next reboot.
  */
-static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
-	int via_ioctl)
+static void cciss_update_drive_info(ctlr_info_t *h, int drv_index,
+	int first_time, int via_ioctl)
 {
-	ctlr_info_t *h = hba[ctlr];
 	struct gendisk *disk;
 	InquiryData_struct *inq_buff = NULL;
 	unsigned int block_size;
@@ -1967,16 +1966,16 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
 
 	/* testing to see if 16-byte CDBs are already being used */
 	if (h->cciss_read == CCISS_READ_16) {
-		cciss_read_capacity_16(h->ctlr, drv_index,
+		cciss_read_capacity_16(h, drv_index,
 			&total_size, &block_size);
 
 	} else {
-		cciss_read_capacity(ctlr, drv_index, &total_size, &block_size);
+		cciss_read_capacity(h, drv_index, &total_size, &block_size);
 		/* if read_capacity returns all F's this volume is >2TB */
 		/* in size so we switch to 16-byte CDB's for all */
 		/* read/write ops */
 		if (total_size == 0xFFFFFFFFULL) {
-			cciss_read_capacity_16(ctlr, drv_index,
+			cciss_read_capacity_16(h, drv_index,
 			&total_size, &block_size);
 			h->cciss_read = CCISS_READ_16;
 			h->cciss_write = CCISS_WRITE_16;
@@ -1986,14 +1985,14 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
 		}
 	}
 
-	cciss_geometry_inquiry(ctlr, drv_index, total_size, block_size,
+	cciss_geometry_inquiry(h, drv_index, total_size, block_size,
 			       inq_buff, drvinfo);
 	drvinfo->block_size = block_size;
 	drvinfo->nr_blocks = total_size + 1;
 
-	cciss_get_device_descr(ctlr, drv_index, drvinfo->vendor,
+	cciss_get_device_descr(h, drv_index, drvinfo->vendor,
 				drvinfo->model, drvinfo->rev);
-	cciss_get_serial_no(ctlr, drv_index, drvinfo->serial_no,
+	cciss_get_serial_no(h, drv_index, drvinfo->serial_no,
 			sizeof(drvinfo->serial_no));
 	/* Save the lunid in case we deregister the disk, below. */
 	memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
@@ -2019,9 +2018,9 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
 	 */
 	if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
 		printk(KERN_WARNING "disk %d has changed.\n", drv_index);
-		spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+		spin_lock_irqsave(&h->lock, flags);
 		h->drv[drv_index]->busy_configuring = 1;
-		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 
 		/* deregister_disk sets h->drv[drv_index]->queue = NULL
 		 * which keeps the interrupt handler from starting
@@ -2243,7 +2242,6 @@ error:
 static int rebuild_lun_table(ctlr_info_t *h, int first_time,
 	int via_ioctl)
 {
-	int ctlr = h->ctlr;
 	int num_luns;
 	ReportLunData_struct *ld_buff = NULL;
 	int return_code;
@@ -2258,19 +2256,19 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
 		return -EPERM;
 
 	/* Set busy_configuring flag for this operation */
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	if (h->busy_configuring) {
-		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return -EBUSY;
 	}
 	h->busy_configuring = 1;
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 
 	ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
 	if (ld_buff == NULL)
 		goto mem_msg;
 
-	return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
+	return_code = sendcmd_withirq(h, CISS_REPORT_LOG, ld_buff,
 				      sizeof(ReportLunData_struct),
 				      0, CTLR_LUNID, TYPE_CMD);
 
@@ -2317,9 +2315,9 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
 		}
 		if (!drv_found) {
 			/* Deregister it from the OS, it's gone. */
-			spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+			spin_lock_irqsave(&h->lock, flags);
 			h->drv[i]->busy_configuring = 1;
-			spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+			spin_unlock_irqrestore(&h->lock, flags);
 			return_code = deregister_disk(h, i, 1, via_ioctl);
 			if (h->drv[i] != NULL)
 				h->drv[i]->busy_configuring = 0;
@@ -2358,8 +2356,7 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
 			if (drv_index == -1)
 				goto freeret;
 		}
-		cciss_update_drive_info(ctlr, drv_index, first_time,
-			via_ioctl);
+		cciss_update_drive_info(h, drv_index, first_time, via_ioctl);
 	}		/* end for */
 
 freeret:
@@ -2491,11 +2488,10 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
 	return 0;
 }
 
-static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
+static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
 		size_t size, __u8 page_code, unsigned char *scsi3addr,
 		int cmd_type)
 {
-	ctlr_info_t *h = hba[ctlr];
 	u64bit buff_dma_handle;
 	int status = IO_OK;
 
@@ -2580,7 +2576,8 @@ static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
 			break;
 		default:
 			printk(KERN_WARNING
-			       "cciss%d:  Unknown Command 0x%c\n", ctlr, cmd);
+			       "cciss%d:  Unknown Command 0x%c\n",
+				h->ctlr, cmd);
 			return IO_ERROR;
 		}
 	} else if (cmd_type == TYPE_MSG) {
@@ -2613,12 +2610,13 @@ static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
 			break;
 		default:
 			printk(KERN_WARNING
-			       "cciss%d: unknown message type %d\n", ctlr, cmd);
+			       "cciss%d: unknown message type %d\n",
+				h->ctlr, cmd);
 			return IO_ERROR;
 		}
 	} else {
 		printk(KERN_WARNING
-		       "cciss%d: unknown command type %d\n", ctlr, cmd_type);
+		       "cciss%d: unknown command type %d\n", h->ctlr, cmd_type);
 		return IO_ERROR;
 	}
 	/* Fill in the scatter gather information */
@@ -2760,18 +2758,17 @@ command_done:
 	return return_status;
 }
 
-static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
+static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
 			   __u8 page_code, unsigned char scsi3addr[],
 			int cmd_type)
 {
-	ctlr_info_t *h = hba[ctlr];
 	CommandList_struct *c;
 	int return_status;
 
 	c = cmd_alloc(h, 0);
 	if (!c)
 		return -ENOMEM;
-	return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
+	return_status = fill_cmd(h, c, cmd, buff, size, page_code,
 		scsi3addr, cmd_type);
 	if (return_status == IO_OK)
 		return_status = sendcmd_withirq_core(h, c, 1);
@@ -2780,7 +2777,7 @@ static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
 	return return_status;
 }
 
-static void cciss_geometry_inquiry(int ctlr, int logvol,
+static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
 				   sector_t total_size,
 				   unsigned int block_size,
 				   InquiryData_struct *inq_buff,
@@ -2791,8 +2788,8 @@ static void cciss_geometry_inquiry(int ctlr, int logvol,
 	unsigned char scsi3addr[8];
 
 	memset(inq_buff, 0, sizeof(InquiryData_struct));
-	log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
-	return_code = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buff,
+	log_unit_to_scsi3addr(h, scsi3addr, logvol);
+	return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
 			sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
 	if (return_code == IO_OK) {
 		if (inq_buff->data_byte[8] == 0xFF) {
@@ -2826,7 +2823,7 @@ static void cciss_geometry_inquiry(int ctlr, int logvol,
 }
 
 static void
-cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
+cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size,
 		    unsigned int *block_size)
 {
 	ReadCapdata_struct *buf;
@@ -2839,8 +2836,8 @@ cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
 		return;
 	}
 
-	log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
-	return_code = sendcmd_withirq(CCISS_READ_CAPACITY, ctlr, buf,
+	log_unit_to_scsi3addr(h, scsi3addr, logvol);
+	return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY, buf,
 		sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
 	if (return_code == IO_OK) {
 		*total_size = be32_to_cpu(*(__be32 *) buf->total_size);
@@ -2853,7 +2850,7 @@ cciss_read_capacity(int ctlr, int logvol, sector_t *total_size,
 	kfree(buf);
 }
 
-static void cciss_read_capacity_16(int ctlr, int logvol,
+static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
 	sector_t *total_size, unsigned int *block_size)
 {
 	ReadCapdata_struct_16 *buf;
@@ -2866,9 +2863,9 @@ static void cciss_read_capacity_16(int ctlr, int logvol,
 		return;
 	}
 
-	log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
-	return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
-		ctlr, buf, sizeof(ReadCapdata_struct_16),
+	log_unit_to_scsi3addr(h, scsi3addr, logvol);
+	return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY_16,
+		buf, sizeof(ReadCapdata_struct_16),
 			0, scsi3addr, TYPE_CMD);
 	if (return_code == IO_OK) {
 		*total_size = be64_to_cpu(*(__be64 *) buf->total_size);
@@ -2910,13 +2907,13 @@ static int cciss_revalidate(struct gendisk *disk)
 		return 1;
 	}
 	if (h->cciss_read == CCISS_READ_10) {
-		cciss_read_capacity(h->ctlr, logvol,
+		cciss_read_capacity(h, logvol,
 					&total_size, &block_size);
 	} else {
-		cciss_read_capacity_16(h->ctlr, logvol,
+		cciss_read_capacity_16(h, logvol,
 					&total_size, &block_size);
 	}
-	cciss_geometry_inquiry(h->ctlr, logvol, total_size, block_size,
+	cciss_geometry_inquiry(h, logvol, total_size, block_size,
 			       inq_buff, drv);
 
 	blk_queue_logical_block_size(drv->queue, drv->block_size);
@@ -2966,7 +2963,7 @@ static void start_io(ctlr_info_t *h)
 	}
 }
 
-/* Assumes that CCISS_LOCK(h->ctlr) is held. */
+/* Assumes that h->lock is held. */
 /* Zeros out the error record and then resends the command back */
 /* to the controller */
 static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
@@ -3494,7 +3491,7 @@ static irqreturn_t do_cciss_intx(int irq, void *dev_id)
 	 * If there are completed commands in the completion queue,
 	 * we had better do something about it.
 	 */
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	while (interrupt_pending(h)) {
 		raw_tag = get_next_completion(h);
 		while (raw_tag != FIFO_EMPTY) {
@@ -3505,7 +3502,7 @@ static irqreturn_t do_cciss_intx(int irq, void *dev_id)
 		}
 	}
 
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 	return IRQ_HANDLED;
 }
 
@@ -3524,7 +3521,7 @@ static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
 	 * If there are completed commands in the completion queue,
 	 * we had better do something about it.
 	 */
-	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
 	raw_tag = get_next_completion(h);
 	while (raw_tag != FIFO_EMPTY) {
 		if (cciss_tag_contains_index(raw_tag))
@@ -3533,7 +3530,7 @@ static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
 			raw_tag = process_nonindexed_cmd(h, raw_tag);
 	}
 
-	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+	spin_unlock_irqrestore(&h->lock, flags);
 	return IRQ_HANDLED;
 }
 
@@ -3961,7 +3958,7 @@ clean_up:
  * controllers that are capable. If not, we use IO-APIC mode.
  */
 
-static void __devinit cciss_interrupt_mode(ctlr_info_t *c)
+static void __devinit cciss_interrupt_mode(ctlr_info_t *h)
 {
 #ifdef CONFIG_PCI_MSI
 	int err;
@@ -3970,18 +3967,18 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c)
 	};
 
 	/* Some boards advertise MSI but don't really support it */
-	if ((c->board_id == 0x40700E11) || (c->board_id == 0x40800E11) ||
-	    (c->board_id == 0x40820E11) || (c->board_id == 0x40830E11))
+	if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
+	    (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
 		goto default_int_mode;
 
-	if (pci_find_capability(c->pdev, PCI_CAP_ID_MSIX)) {
-		err = pci_enable_msix(c->pdev, cciss_msix_entries, 4);
+	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
+		err = pci_enable_msix(h->pdev, cciss_msix_entries, 4);
 		if (!err) {
-			c->intr[0] = cciss_msix_entries[0].vector;
-			c->intr[1] = cciss_msix_entries[1].vector;
-			c->intr[2] = cciss_msix_entries[2].vector;
-			c->intr[3] = cciss_msix_entries[3].vector;
-			c->msix_vector = 1;
+			h->intr[0] = cciss_msix_entries[0].vector;
+			h->intr[1] = cciss_msix_entries[1].vector;
+			h->intr[2] = cciss_msix_entries[2].vector;
+			h->intr[3] = cciss_msix_entries[3].vector;
+			h->msix_vector = 1;
 			return;
 		}
 		if (err > 0) {
@@ -3994,17 +3991,16 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *c)
 			goto default_int_mode;
 		}
 	}
-	if (pci_find_capability(c->pdev, PCI_CAP_ID_MSI)) {
-		if (!pci_enable_msi(c->pdev)) {
-			c->msi_vector = 1;
-		} else {
+	if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
+		if (!pci_enable_msi(h->pdev))
+			h->msi_vector = 1;
+		else
 			printk(KERN_WARNING "cciss: MSI init failed\n");
-		}
 	}
 default_int_mode:
 #endif				/* CONFIG_PCI_MSI */
 	/* if we get here we're going to use the default interrupt mode */
-	c->intr[PERF_MODE_INT] = c->pdev->irq;
+	h->intr[PERF_MODE_INT] = h->pdev->irq;
 	return;
 }
 
@@ -4190,28 +4186,28 @@ static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h)
 	pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch);
 }
 
-static int __devinit cciss_pci_init(ctlr_info_t *c)
+static int __devinit cciss_pci_init(ctlr_info_t *h)
 {
 	int prod_index, err;
 
-	prod_index = cciss_lookup_board_id(c->pdev, &c->board_id);
+	prod_index = cciss_lookup_board_id(h->pdev, &h->board_id);
 	if (prod_index < 0)
 		return -ENODEV;
-	c->product_name = products[prod_index].product_name;
-	c->access = *(products[prod_index].access);
+	h->product_name = products[prod_index].product_name;
+	h->access = *(products[prod_index].access);
 
-	if (cciss_board_disabled(c)) {
+	if (cciss_board_disabled(h)) {
 		printk(KERN_WARNING
 		       "cciss: controller appears to be disabled\n");
 		return -ENODEV;
 	}
-	err = pci_enable_device(c->pdev);
+	err = pci_enable_device(h->pdev);
 	if (err) {
 		printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
 		return err;
 	}
 
-	err = pci_request_regions(c->pdev, "cciss");
+	err = pci_request_regions(h->pdev, "cciss");
 	if (err) {
 		printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
 		       "aborting\n");
@@ -4220,38 +4216,38 @@ static int __devinit cciss_pci_init(ctlr_info_t *c)
 
 #ifdef CCISS_DEBUG
 	printk(KERN_INFO "command = %x\n", command);
-	printk(KERN_INFO "irq = %x\n", c->pdev->irq);
-	printk(KERN_INFO "board_id = %x\n", c->board_id);
+	printk(KERN_INFO "irq = %x\n", h->pdev->irq);
+	printk(KERN_INFO "board_id = %x\n", h->board_id);
 #endif				/* CCISS_DEBUG */
 
 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
  * else we use the IO-APIC interrupt assigned to us by system ROM.
  */
-	cciss_interrupt_mode(c);
-	err = cciss_pci_find_memory_BAR(c->pdev, &c->paddr);
+	cciss_interrupt_mode(h);
+	err = cciss_pci_find_memory_BAR(h->pdev, &h->paddr);
 	if (err)
 		goto err_out_free_res;
-	c->vaddr = remap_pci_mem(c->paddr, 0x250);
-	if (!c->vaddr) {
+	h->vaddr = remap_pci_mem(h->paddr, 0x250);
+	if (!h->vaddr) {
 		err = -ENOMEM;
 		goto err_out_free_res;
 	}
-	err = cciss_wait_for_board_ready(c);
+	err = cciss_wait_for_board_ready(h);
 	if (err)
 		goto err_out_free_res;
-	err = cciss_find_cfgtables(c);
+	err = cciss_find_cfgtables(h);
 	if (err)
 		goto err_out_free_res;
-	print_cfg_table(c->cfgtable);
-	cciss_find_board_params(c);
+	print_cfg_table(h->cfgtable);
+	cciss_find_board_params(h);
 
-	if (!CISS_signature_present(c)) {
+	if (!CISS_signature_present(h)) {
 		err = -ENODEV;
 		goto err_out_free_res;
 	}
-	cciss_enable_scsi_prefetch(c);
-	cciss_p600_dma_prefetch_quirk(c);
-	cciss_put_controller_into_performant_mode(c);
+	cciss_enable_scsi_prefetch(h);
+	cciss_p600_dma_prefetch_quirk(h);
+	cciss_put_controller_into_performant_mode(h);
 	return 0;
 
 err_out_free_res:
@@ -4259,13 +4255,13 @@ err_out_free_res:
 	 * Deliberately omit pci_disable_device(): it does something nasty to
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
-	if (c->transtable)
-		iounmap(c->transtable);
-	if (c->cfgtable)
-		iounmap(c->cfgtable);
-	if (c->vaddr)
-		iounmap(c->vaddr);
-	pci_release_regions(c->pdev);
+	if (h->transtable)
+		iounmap(h->transtable);
+	if (h->cfgtable)
+		iounmap(h->cfgtable);
+	if (h->vaddr)
+		iounmap(h->vaddr);
+	pci_release_regions(h->pdev);
 	return err;
 }
 
@@ -4278,12 +4274,12 @@ static int alloc_cciss_hba(void)
 
 	for (i = 0; i < MAX_CTLR; i++) {
 		if (!hba[i]) {
-			ctlr_info_t *p;
+			ctlr_info_t *h;
 
-			p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
-			if (!p)
+			h = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
+			if (!h)
 				goto Enomem;
-			hba[i] = p;
+			hba[i] = h;
 			return i;
 		}
 	}
@@ -4295,12 +4291,11 @@ Enomem:
 	return -1;
 }
 
-static void free_hba(int n)
+static void free_hba(ctlr_info_t *h)
 {
-	ctlr_info_t *h = hba[n];
 	int i;
 
-	hba[n] = NULL;
+	hba[h->ctlr] = NULL;
 	for (i = 0; i < h->highest_lun + 1; i++)
 		if (h->gendisk[i] != NULL)
 			put_disk(h->gendisk[i]);
@@ -4651,6 +4646,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	int rc;
 	int dac, return_code;
 	InquiryData_struct *inq_buff;
+	ctlr_info_t *h;
 
 	rc = cciss_init_reset_devices(pdev);
 	if (rc)
@@ -4659,21 +4655,22 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	if (i < 0)
 		return -1;
 
-	hba[i]->pdev = pdev;
-	hba[i]->busy_initializing = 1;
-	INIT_HLIST_HEAD(&hba[i]->cmpQ);
-	INIT_HLIST_HEAD(&hba[i]->reqQ);
-	mutex_init(&hba[i]->busy_shutting_down);
+	h = hba[i];
+	h->pdev = pdev;
+	h->busy_initializing = 1;
+	INIT_HLIST_HEAD(&h->cmpQ);
+	INIT_HLIST_HEAD(&h->reqQ);
+	mutex_init(&h->busy_shutting_down);
 
-	if (cciss_pci_init(hba[i]) != 0)
+	if (cciss_pci_init(h) != 0)
 		goto clean_no_release_regions;
 
-	sprintf(hba[i]->devname, "cciss%d", i);
-	hba[i]->ctlr = i;
+	sprintf(h->devname, "cciss%d", i);
+	h->ctlr = i;
 
-	init_completion(&hba[i]->scan_wait);
+	init_completion(&h->scan_wait);
 
-	if (cciss_create_hba_sysfs_entry(hba[i]))
+	if (cciss_create_hba_sysfs_entry(h))
 		goto clean0;
 
 	/* configure PCI DMA stuff */
@@ -4692,100 +4689,100 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	 * 8 controller support.
 	 */
 	if (i < MAX_CTLR_ORIG)
-		hba[i]->major = COMPAQ_CISS_MAJOR + i;
-	rc = register_blkdev(hba[i]->major, hba[i]->devname);
+		h->major = COMPAQ_CISS_MAJOR + i;
+	rc = register_blkdev(h->major, h->devname);
 	if (rc == -EBUSY || rc == -EINVAL) {
 		printk(KERN_ERR
 		       "cciss:  Unable to get major number %d for %s "
-		       "on hba %d\n", hba[i]->major, hba[i]->devname, i);
+		       "on hba %d\n", h->major, h->devname, i);
 		goto clean1;
 	} else {
 		if (i >= MAX_CTLR_ORIG)
-			hba[i]->major = rc;
+			h->major = rc;
 	}
 
 	/* make sure the board interrupts are off */
-	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
-	if (hba[i]->msi_vector || hba[i]->msix_vector) {
-		if (request_irq(hba[i]->intr[PERF_MODE_INT],
+	h->access.set_intr_mask(h, CCISS_INTR_OFF);
+	if (h->msi_vector || h->msix_vector) {
+		if (request_irq(h->intr[PERF_MODE_INT],
 				do_cciss_msix_intr,
-				IRQF_DISABLED, hba[i]->devname, hba[i])) {
+				IRQF_DISABLED, h->devname, h)) {
 			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
-			       hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
+			       h->intr[PERF_MODE_INT], h->devname);
 			goto clean2;
 		}
 	} else {
-		if (request_irq(hba[i]->intr[PERF_MODE_INT], do_cciss_intx,
-				IRQF_DISABLED, hba[i]->devname, hba[i])) {
+		if (request_irq(h->intr[PERF_MODE_INT], do_cciss_intx,
+				IRQF_DISABLED, h->devname, h)) {
 			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
-			       hba[i]->intr[PERF_MODE_INT], hba[i]->devname);
+			       h->intr[PERF_MODE_INT], h->devname);
 			goto clean2;
 		}
 	}
 
 	printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
-	       hba[i]->devname, pdev->device, pci_name(pdev),
-	       hba[i]->intr[PERF_MODE_INT], dac ? "" : " not");
+	       h->devname, pdev->device, pci_name(pdev),
+	       h->intr[PERF_MODE_INT], dac ? "" : " not");
 
-	hba[i]->cmd_pool_bits =
-	    kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
+	h->cmd_pool_bits =
+	    kmalloc(DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG)
 			* sizeof(unsigned long), GFP_KERNEL);
-	hba[i]->cmd_pool = (CommandList_struct *)
-	    pci_alloc_consistent(hba[i]->pdev,
-		    hba[i]->nr_cmds * sizeof(CommandList_struct),
-		    &(hba[i]->cmd_pool_dhandle));
-	hba[i]->errinfo_pool = (ErrorInfo_struct *)
-	    pci_alloc_consistent(hba[i]->pdev,
-		    hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
-		    &(hba[i]->errinfo_pool_dhandle));
-	if ((hba[i]->cmd_pool_bits == NULL)
-	    || (hba[i]->cmd_pool == NULL)
-	    || (hba[i]->errinfo_pool == NULL)) {
+	h->cmd_pool = (CommandList_struct *)
+	    pci_alloc_consistent(h->pdev,
+		    h->nr_cmds * sizeof(CommandList_struct),
+		    &(h->cmd_pool_dhandle));
+	h->errinfo_pool = (ErrorInfo_struct *)
+	    pci_alloc_consistent(h->pdev,
+		    h->nr_cmds * sizeof(ErrorInfo_struct),
+		    &(h->errinfo_pool_dhandle));
+	if ((h->cmd_pool_bits == NULL)
+	    || (h->cmd_pool == NULL)
+	    || (h->errinfo_pool == NULL)) {
 		printk(KERN_ERR "cciss: out of memory");
 		goto clean4;
 	}
 
 	/* Need space for temp scatter list */
-	hba[i]->scatter_list = kmalloc(hba[i]->max_commands *
+	h->scatter_list = kmalloc(h->max_commands *
 						sizeof(struct scatterlist *),
 						GFP_KERNEL);
-	for (k = 0; k < hba[i]->nr_cmds; k++) {
-		hba[i]->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
-							hba[i]->maxsgentries,
+	for (k = 0; k < h->nr_cmds; k++) {
+		h->scatter_list[k] = kmalloc(sizeof(struct scatterlist) *
+							h->maxsgentries,
 							GFP_KERNEL);
-		if (hba[i]->scatter_list[k] == NULL) {
+		if (h->scatter_list[k] == NULL) {
 			printk(KERN_ERR "cciss%d: could not allocate "
 				"s/g lists\n", i);
 			goto clean4;
 		}
 	}
-	hba[i]->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[i],
-		hba[i]->chainsize, hba[i]->nr_cmds);
-	if (!hba[i]->cmd_sg_list && hba[i]->chainsize > 0)
+	h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
+		h->chainsize, h->nr_cmds);
+	if (!h->cmd_sg_list && h->chainsize > 0)
 		goto clean4;
 
-	spin_lock_init(&hba[i]->lock);
+	spin_lock_init(&h->lock);
 
 	/* Initialize the pdev driver private data.
-	   have it point to hba[i].  */
-	pci_set_drvdata(pdev, hba[i]);
+	   have it point to h.  */
+	pci_set_drvdata(pdev, h);
 	/* command and error info recs zeroed out before
 	   they are used */
-	memset(hba[i]->cmd_pool_bits, 0,
-	       DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
+	memset(h->cmd_pool_bits, 0,
+	       DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG)
 			* sizeof(unsigned long));
 
-	hba[i]->num_luns = 0;
-	hba[i]->highest_lun = -1;
+	h->num_luns = 0;
+	h->highest_lun = -1;
 	for (j = 0; j < CISS_MAX_LUN; j++) {
-		hba[i]->drv[j] = NULL;
-		hba[i]->gendisk[j] = NULL;
+		h->drv[j] = NULL;
+		h->gendisk[j] = NULL;
 	}
 
-	cciss_scsi_setup(i);
+	cciss_scsi_setup(h);
 
 	/* Turn the interrupts on so we can service requests */
-	hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
+	h->access.set_intr_mask(h, CCISS_INTR_ON);
 
 	/* Get the firmware version */
 	inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
@@ -4794,59 +4791,59 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 		goto clean4;
 	}
 
-	return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
+	return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
 		sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
 	if (return_code == IO_OK) {
-		hba[i]->firm_ver[0] = inq_buff->data_byte[32];
-		hba[i]->firm_ver[1] = inq_buff->data_byte[33];
-		hba[i]->firm_ver[2] = inq_buff->data_byte[34];
-		hba[i]->firm_ver[3] = inq_buff->data_byte[35];
+		h->firm_ver[0] = inq_buff->data_byte[32];
+		h->firm_ver[1] = inq_buff->data_byte[33];
+		h->firm_ver[2] = inq_buff->data_byte[34];
+		h->firm_ver[3] = inq_buff->data_byte[35];
 	} else {	 /* send command failed */
 		printk(KERN_WARNING "cciss: unable to determine firmware"
 			" version of controller\n");
 	}
 	kfree(inq_buff);
 
-	cciss_procinit(i);
+	cciss_procinit(h);
 
-	hba[i]->cciss_max_sectors = 8192;
+	h->cciss_max_sectors = 8192;
 
-	rebuild_lun_table(hba[i], 1, 0);
-	hba[i]->busy_initializing = 0;
+	rebuild_lun_table(h, 1, 0);
+	h->busy_initializing = 0;
 	return 1;
 
 clean4:
-	kfree(hba[i]->cmd_pool_bits);
+	kfree(h->cmd_pool_bits);
 	/* Free up sg elements */
-	for (k = 0; k < hba[i]->nr_cmds; k++)
-		kfree(hba[i]->scatter_list[k]);
-	kfree(hba[i]->scatter_list);
-	cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
-	if (hba[i]->cmd_pool)
-		pci_free_consistent(hba[i]->pdev,
-				    hba[i]->nr_cmds * sizeof(CommandList_struct),
-				    hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
-	if (hba[i]->errinfo_pool)
-		pci_free_consistent(hba[i]->pdev,
-				    hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
-				    hba[i]->errinfo_pool,
-				    hba[i]->errinfo_pool_dhandle);
-	free_irq(hba[i]->intr[PERF_MODE_INT], hba[i]);
+	for (k = 0; k < h->nr_cmds; k++)
+		kfree(h->scatter_list[k]);
+	kfree(h->scatter_list);
+	cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
+	if (h->cmd_pool)
+		pci_free_consistent(h->pdev,
+				    h->nr_cmds * sizeof(CommandList_struct),
+				    h->cmd_pool, h->cmd_pool_dhandle);
+	if (h->errinfo_pool)
+		pci_free_consistent(h->pdev,
+				    h->nr_cmds * sizeof(ErrorInfo_struct),
+				    h->errinfo_pool,
+				    h->errinfo_pool_dhandle);
+	free_irq(h->intr[PERF_MODE_INT], h);
 clean2:
-	unregister_blkdev(hba[i]->major, hba[i]->devname);
+	unregister_blkdev(h->major, h->devname);
 clean1:
-	cciss_destroy_hba_sysfs_entry(hba[i]);
+	cciss_destroy_hba_sysfs_entry(h);
 clean0:
 	pci_release_regions(pdev);
 clean_no_release_regions:
-	hba[i]->busy_initializing = 0;
+	h->busy_initializing = 0;
 
 	/*
 	 * Deliberately omit pci_disable_device(): it does something nasty to
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
 	pci_set_drvdata(pdev, NULL);
-	free_hba(i);
+	free_hba(h);
 	return -1;
 }
 
@@ -4866,7 +4863,7 @@ static void cciss_shutdown(struct pci_dev *pdev)
 	}
 	/* write all data in the battery backed cache to disk */
 	memset(flush_buf, 0, 4);
-	return_code = sendcmd_withirq(CCISS_CACHE_FLUSH, h->ctlr, flush_buf,
+	return_code = sendcmd_withirq(h, CCISS_CACHE_FLUSH, flush_buf,
 		4, 0, CTLR_LUNID, TYPE_CMD);
 	kfree(flush_buf);
 	if (return_code != IO_OK)
@@ -4878,7 +4875,7 @@ static void cciss_shutdown(struct pci_dev *pdev)
 
 static void __devexit cciss_remove_one(struct pci_dev *pdev)
 {
-	ctlr_info_t *tmp_ptr;
+	ctlr_info_t *h;
 	int i, j;
 
 	if (pci_get_drvdata(pdev) == NULL) {
@@ -4886,28 +4883,28 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
 		return;
 	}
 
-	tmp_ptr = pci_get_drvdata(pdev);
-	i = tmp_ptr->ctlr;
+	h = pci_get_drvdata(pdev);
+	i = h->ctlr;
 	if (hba[i] == NULL) {
 		printk(KERN_ERR "cciss: device appears to "
-		       "already be removed \n");
+		       "already be removed\n");
 		return;
 	}
 
-	mutex_lock(&hba[i]->busy_shutting_down);
+	mutex_lock(&h->busy_shutting_down);
 
-	remove_from_scan_list(hba[i]);
-	remove_proc_entry(hba[i]->devname, proc_cciss);
-	unregister_blkdev(hba[i]->major, hba[i]->devname);
+	remove_from_scan_list(h);
+	remove_proc_entry(h->devname, proc_cciss);
+	unregister_blkdev(h->major, h->devname);
 
 	/* remove it from the disk list */
 	for (j = 0; j < CISS_MAX_LUN; j++) {
-		struct gendisk *disk = hba[i]->gendisk[j];
+		struct gendisk *disk = h->gendisk[j];
 		if (disk) {
 			struct request_queue *q = disk->queue;
 
 			if (disk->flags & GENHD_FL_UP) {
-				cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
+				cciss_destroy_ld_sysfs_entry(h, j, 1);
 				del_gendisk(disk);
 			}
 			if (q)
@@ -4916,41 +4913,41 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
 	}
 
 #ifdef CONFIG_CISS_SCSI_TAPE
-	cciss_unregister_scsi(i);	/* unhook from SCSI subsystem */
+	cciss_unregister_scsi(h);	/* unhook from SCSI subsystem */
 #endif
 
 	cciss_shutdown(pdev);
 
 #ifdef CONFIG_PCI_MSI
-	if (hba[i]->msix_vector)
-		pci_disable_msix(hba[i]->pdev);
-	else if (hba[i]->msi_vector)
-		pci_disable_msi(hba[i]->pdev);
+	if (h->msix_vector)
+		pci_disable_msix(h->pdev);
+	else if (h->msi_vector)
+		pci_disable_msi(h->pdev);
 #endif				/* CONFIG_PCI_MSI */
 
-	iounmap(hba[i]->transtable);
-	iounmap(hba[i]->cfgtable);
-	iounmap(hba[i]->vaddr);
+	iounmap(h->transtable);
+	iounmap(h->cfgtable);
+	iounmap(h->vaddr);
 
-	pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
-			    hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
-	pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
-			    hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
-	kfree(hba[i]->cmd_pool_bits);
+	pci_free_consistent(h->pdev, h->nr_cmds * sizeof(CommandList_struct),
+			    h->cmd_pool, h->cmd_pool_dhandle);
+	pci_free_consistent(h->pdev, h->nr_cmds * sizeof(ErrorInfo_struct),
+			    h->errinfo_pool, h->errinfo_pool_dhandle);
+	kfree(h->cmd_pool_bits);
 	/* Free up sg elements */
-	for (j = 0; j < hba[i]->nr_cmds; j++)
-		kfree(hba[i]->scatter_list[j]);
-	kfree(hba[i]->scatter_list);
-	cciss_free_sg_chain_blocks(hba[i]->cmd_sg_list, hba[i]->nr_cmds);
+	for (j = 0; j < h->nr_cmds; j++)
+		kfree(h->scatter_list[j]);
+	kfree(h->scatter_list);
+	cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
 	/*
 	 * Deliberately omit pci_disable_device(): it does something nasty to
 	 * Smart Array controllers that pci_enable_device does not undo
 	 */
 	pci_release_regions(pdev);
 	pci_set_drvdata(pdev, NULL);
-	cciss_destroy_hba_sysfs_entry(hba[i]);
-	mutex_unlock(&hba[i]->busy_shutting_down);
-	free_hba(i);
+	cciss_destroy_hba_sysfs_entry(h);
+	mutex_unlock(&h->busy_shutting_down);
+	free_hba(h);
 }
 
 static struct pci_driver cciss_pci_driver = {
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 4290b7f0f639..ae340ffc8f81 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -419,6 +419,4 @@ struct board_type {
 	int nr_cmds; /* Max cmds this kind of ctlr can handle. */
 };
 
-#define CCISS_LOCK(i)	(&hba[i]->lock)
-
 #endif /* CCISS_H */
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 3604b72f2af9..9133ad4c7b1b 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -44,7 +44,7 @@
 #define CCISS_ABORT_MSG 0x00
 #define CCISS_RESET_MSG 0x01
 
-static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
+static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
 	size_t size,
 	__u8 page_code, unsigned char *scsi3addr,
 	int cmd_type);
@@ -127,16 +127,16 @@ struct cciss_scsi_adapter_data_t {
 	spinlock_t lock; // to protect ccissscsi[ctlr]; 
 };
 
-#define CPQ_TAPE_LOCK(ctlr, flags) spin_lock_irqsave( \
-	&hba[ctlr]->scsi_ctlr->lock, flags);
-#define CPQ_TAPE_UNLOCK(ctlr, flags) spin_unlock_irqrestore( \
-	&hba[ctlr]->scsi_ctlr->lock, flags);
+#define CPQ_TAPE_LOCK(h, flags) spin_lock_irqsave( \
+	&h->scsi_ctlr->lock, flags);
+#define CPQ_TAPE_UNLOCK(h, flags) spin_unlock_irqrestore( \
+	&h->scsi_ctlr->lock, flags);
 
 static CommandList_struct *
 scsi_cmd_alloc(ctlr_info_t *h)
 {
 	/* assume only one process in here at a time, locking done by caller. */
-	/* use CCISS_LOCK(ctlr) */
+	/* use h->lock */
 	/* might be better to rewrite how we allocate scsi commands in a way that */
 	/* needs no locking at all. */
 
@@ -177,10 +177,10 @@ scsi_cmd_alloc(ctlr_info_t *h)
 }
 
 static void 
-scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd)
+scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
 {
 	/* assume only one process in here at a time, locking done by caller. */
-	/* use CCISS_LOCK(ctlr) */
+	/* use h->lock */
 	/* drop the free memory chunk on top of the stack. */
 
 	struct cciss_scsi_adapter_data_t *sa;
@@ -193,19 +193,19 @@ scsi_cmd_free(ctlr_info_t *h, CommandList_struct *cmd)
 		printk("cciss: scsi_cmd_free called too many times.\n");
 		BUG();
 	}
-	stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) cmd;
+	stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
 }
 
 static int
-scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
+scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
 {
 	int i;
 	struct cciss_scsi_cmd_stack_t *stk;
 	size_t size;
 
-	sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(hba[ctlr],
-		hba[ctlr]->chainsize, CMD_STACK_SIZE);
-	if (!sa->cmd_sg_list && hba[ctlr]->chainsize > 0)
+	sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
+		h->chainsize, CMD_STACK_SIZE);
+	if (!sa->cmd_sg_list && h->chainsize > 0)
 		return -ENOMEM;
 
 	stk = &sa->cmd_stack; 
@@ -215,7 +215,7 @@ scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
 	BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
 	/* pci_alloc_consistent guarantees 32-bit DMA address will be used */
 	stk->pool = (struct cciss_scsi_cmd_stack_elem_t *)
-		pci_alloc_consistent(hba[ctlr]->pdev, size, &stk->cmd_pool_handle);
+		pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
 
 	if (stk->pool == NULL) {
 		cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
@@ -234,13 +234,13 @@ scsi_cmd_stack_setup(int ctlr, struct cciss_scsi_adapter_data_t *sa)
 }
 
 static void
-scsi_cmd_stack_free(int ctlr)
+scsi_cmd_stack_free(ctlr_info_t *h)
 {
 	struct cciss_scsi_adapter_data_t *sa;
 	struct cciss_scsi_cmd_stack_t *stk;
 	size_t size;
 
-	sa = hba[ctlr]->scsi_ctlr;
+	sa = h->scsi_ctlr;
 	stk = &sa->cmd_stack; 
 	if (stk->top != CMD_STACK_SIZE-1) {
 		printk( "cciss: %d scsi commands are still outstanding.\n",
@@ -250,7 +250,7 @@ scsi_cmd_stack_free(int ctlr)
 	}
 	size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
 
-	pci_free_consistent(hba[ctlr]->pdev, size, stk->pool, stk->cmd_pool_handle);
+	pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
 	stk->pool = NULL;
 	cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
 }
@@ -342,20 +342,20 @@ print_cmd(CommandList_struct *cp)
 #endif
 
 static int 
-find_bus_target_lun(int ctlr, int *bus, int *target, int *lun)
+find_bus_target_lun(ctlr_info_t *h, int *bus, int *target, int *lun)
 {
 	/* finds an unused bus, target, lun for a new device */
-	/* assumes hba[ctlr]->scsi_ctlr->lock is held */ 
+	/* assumes h->scsi_ctlr->lock is held */
 	int i, found=0;
 	unsigned char target_taken[CCISS_MAX_SCSI_DEVS_PER_HBA];
 
 	memset(&target_taken[0], 0, CCISS_MAX_SCSI_DEVS_PER_HBA);
 
 	target_taken[SELF_SCSI_ID] = 1;	
-	for (i=0;i<ccissscsi[ctlr].ndevices;i++)
-		target_taken[ccissscsi[ctlr].dev[i].target] = 1;
+	for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++)
+		target_taken[ccissscsi[h->ctlr].dev[i].target] = 1;
 	
-	for (i=0;i<CCISS_MAX_SCSI_DEVS_PER_HBA;i++) {
+	for (i = 0; i < CCISS_MAX_SCSI_DEVS_PER_HBA; i++) {
 		if (!target_taken[i]) {
 			*bus = 0; *target=i; *lun = 0; found=1;
 			break;
@@ -369,19 +369,19 @@ struct scsi2map {
 };
 
 static int 
-cciss_scsi_add_entry(int ctlr, int hostno, 
+cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
 		struct cciss_scsi_dev_t *device,
 		struct scsi2map *added, int *nadded)
 {
-	/* assumes hba[ctlr]->scsi_ctlr->lock is held */ 
-	int n = ccissscsi[ctlr].ndevices;
+	/* assumes h->scsi_ctlr->lock is held */
+	int n = ccissscsi[h->ctlr].ndevices;
 	struct cciss_scsi_dev_t *sd;
 	int i, bus, target, lun;
 	unsigned char addr1[8], addr2[8];
 
 	if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
 		printk("cciss%d: Too many devices, "
-			"some will be inaccessible.\n", ctlr);
+			"some will be inaccessible.\n", h->ctlr);
 		return -1;
 	}
 
@@ -397,7 +397,7 @@ cciss_scsi_add_entry(int ctlr, int hostno,
 		memcpy(addr1, device->scsi3addr, 8);
 		addr1[4] = 0;
 		for (i = 0; i < n; i++) {
-			sd = &ccissscsi[ctlr].dev[i];
+			sd = &ccissscsi[h->ctlr].dev[i];
 			memcpy(addr2, sd->scsi3addr, 8);
 			addr2[4] = 0;
 			/* differ only in byte 4? */
@@ -410,9 +410,9 @@ cciss_scsi_add_entry(int ctlr, int hostno,
 		}
 	}
 
-	sd = &ccissscsi[ctlr].dev[n];
+	sd = &ccissscsi[h->ctlr].dev[n];
 	if (lun == 0) {
-		if (find_bus_target_lun(ctlr,
+		if (find_bus_target_lun(h,
 			&sd->bus, &sd->target, &sd->lun) != 0)
 			return -1;
 	} else {
@@ -431,37 +431,37 @@ cciss_scsi_add_entry(int ctlr, int hostno,
 	memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
 	sd->devtype = device->devtype;
 
-	ccissscsi[ctlr].ndevices++;
+	ccissscsi[h->ctlr].ndevices++;
 
 	/* initially, (before registering with scsi layer) we don't 
 	   know our hostno and we don't want to print anything first 
 	   time anyway (the scsi layer's inquiries will show that info) */
 	if (hostno != -1)
 		printk("cciss%d: %s device c%db%dt%dl%d added.\n", 
-			ctlr, scsi_device_type(sd->devtype), hostno,
+			h->ctlr, scsi_device_type(sd->devtype), hostno,
 			sd->bus, sd->target, sd->lun);
 	return 0;
 }
 
 static void
-cciss_scsi_remove_entry(int ctlr, int hostno, int entry,
+cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry,
 	struct scsi2map *removed, int *nremoved)
 {
-	/* assumes hba[ctlr]->scsi_ctlr->lock is held */ 
+	/* assumes h->ctlr]->scsi_ctlr->lock is held */
 	int i;
 	struct cciss_scsi_dev_t sd;
 
 	if (entry < 0 || entry >= CCISS_MAX_SCSI_DEVS_PER_HBA) return;
-	sd = ccissscsi[ctlr].dev[entry];
+	sd = ccissscsi[h->ctlr].dev[entry];
 	removed[*nremoved].bus    = sd.bus;
 	removed[*nremoved].target = sd.target;
 	removed[*nremoved].lun    = sd.lun;
 	(*nremoved)++;
-	for (i=entry;i<ccissscsi[ctlr].ndevices-1;i++)
-		ccissscsi[ctlr].dev[i] = ccissscsi[ctlr].dev[i+1];
-	ccissscsi[ctlr].ndevices--;
+	for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++)
+		ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1];
+	ccissscsi[h->ctlr].ndevices--;
 	printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
-		ctlr, scsi_device_type(sd.devtype), hostno,
+		h->ctlr, scsi_device_type(sd.devtype), hostno,
 			sd.bus, sd.target, sd.lun);
 }
 
@@ -476,24 +476,24 @@ cciss_scsi_remove_entry(int ctlr, int hostno, int entry,
 	(a)[1] == (b)[1] && \
 	(a)[0] == (b)[0])
 
-static void fixup_botched_add(int ctlr, char *scsi3addr)
+static void fixup_botched_add(ctlr_info_t *h, char *scsi3addr)
 {
 	/* called when scsi_add_device fails in order to re-adjust */
 	/* ccissscsi[] to match the mid layer's view. */
 	unsigned long flags;
 	int i, j;
-	CPQ_TAPE_LOCK(ctlr, flags);
-	for (i = 0; i < ccissscsi[ctlr].ndevices; i++) {
+	CPQ_TAPE_LOCK(h, flags);
+	for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
 		if (memcmp(scsi3addr,
-				ccissscsi[ctlr].dev[i].scsi3addr, 8) == 0) {
-			for (j = i; j < ccissscsi[ctlr].ndevices-1; j++)
-				ccissscsi[ctlr].dev[j] =
-					ccissscsi[ctlr].dev[j+1];
-			ccissscsi[ctlr].ndevices--;
+				ccissscsi[h->ctlr].dev[i].scsi3addr, 8) == 0) {
+			for (j = i; j < ccissscsi[h->ctlr].ndevices-1; j++)
+				ccissscsi[h->ctlr].dev[j] =
+					ccissscsi[h->ctlr].dev[j+1];
+			ccissscsi[h->ctlr].ndevices--;
 			break;
 		}
 	}
-	CPQ_TAPE_UNLOCK(ctlr, flags);
+	CPQ_TAPE_UNLOCK(h, flags);
 }
 
 static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
@@ -513,7 +513,7 @@ static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
 }
 
 static int
-adjust_cciss_scsi_table(int ctlr, int hostno,
+adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 	struct cciss_scsi_dev_t sd[], int nsds)
 {
 	/* sd contains scsi3 addresses and devtypes, but
@@ -535,14 +535,14 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 
 	if (!added || !removed) {
 		printk(KERN_WARNING "cciss%d: Out of memory in "
-			"adjust_cciss_scsi_table\n", ctlr);
+			"adjust_cciss_scsi_table\n", h->ctlr);
 		goto free_and_out;
 	}
 
-	CPQ_TAPE_LOCK(ctlr, flags);
+	CPQ_TAPE_LOCK(h, flags);
 
 	if (hostno != -1)  /* if it's not the first time... */
-		sh = hba[ctlr]->scsi_ctlr->scsi_host;
+		sh = h->scsi_ctlr->scsi_host;
 
 	/* find any devices in ccissscsi[] that are not in 
 	   sd[] and remove them from ccissscsi[] */
@@ -550,8 +550,8 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 	i = 0;
 	nremoved = 0;
 	nadded = 0;
-	while(i<ccissscsi[ctlr].ndevices) {
-		csd = &ccissscsi[ctlr].dev[i];
+	while (i < ccissscsi[h->ctlr].ndevices) {
+		csd = &ccissscsi[h->ctlr].dev[i];
 		found=0;
 		for (j=0;j<nsds;j++) {
 			if (SCSI3ADDR_EQ(sd[j].scsi3addr,
@@ -567,19 +567,20 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 		if (found == 0) { /* device no longer present. */ 
 			changes++;
 			/* printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
-				ctlr, scsi_device_type(csd->devtype), hostno,
+				h->ctlr, scsi_device_type(csd->devtype), hostno,
 					csd->bus, csd->target, csd->lun); */
-			cciss_scsi_remove_entry(ctlr, hostno, i,
+			cciss_scsi_remove_entry(h, hostno, i,
 				removed, &nremoved);
 			/* remove ^^^, hence i not incremented */
 		} else if (found == 1) { /* device is different in some way */
 			changes++;
 			printk("cciss%d: device c%db%dt%dl%d has changed.\n",
-				ctlr, hostno, csd->bus, csd->target, csd->lun);
-			cciss_scsi_remove_entry(ctlr, hostno, i,
+				h->ctlr, hostno,
+				csd->bus, csd->target, csd->lun);
+			cciss_scsi_remove_entry(h, hostno, i,
 				removed, &nremoved);
 			/* remove ^^^, hence i not incremented */
-			if (cciss_scsi_add_entry(ctlr, hostno, &sd[j],
+			if (cciss_scsi_add_entry(h, hostno, &sd[j],
 				added, &nadded) != 0)
 				/* we just removed one, so add can't fail. */
 					BUG();
@@ -601,8 +602,8 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 
 	for (i=0;i<nsds;i++) {
 		found=0;
-		for (j=0;j<ccissscsi[ctlr].ndevices;j++) {
-			csd = &ccissscsi[ctlr].dev[j];
+		for (j = 0; j < ccissscsi[h->ctlr].ndevices; j++) {
+			csd = &ccissscsi[h->ctlr].dev[j];
 			if (SCSI3ADDR_EQ(sd[i].scsi3addr,
 				csd->scsi3addr)) {
 				if (device_is_the_same(&sd[i], csd))
@@ -614,18 +615,18 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 		}
 		if (!found) {
 			changes++;
-			if (cciss_scsi_add_entry(ctlr, hostno, &sd[i],
+			if (cciss_scsi_add_entry(h, hostno, &sd[i],
 				added, &nadded) != 0)
 				break;
 		} else if (found == 1) {
 			/* should never happen... */
 			changes++;
 			printk(KERN_WARNING "cciss%d: device "
-				"unexpectedly changed\n", ctlr);
+				"unexpectedly changed\n", h->ctlr);
 			/* but if it does happen, we just ignore that device */
 		}
 	}
-	CPQ_TAPE_UNLOCK(ctlr, flags);
+	CPQ_TAPE_UNLOCK(h, flags);
 
 	/* Don't notify scsi mid layer of any changes the first time through */
 	/* (or if there are no changes) scsi_scan_host will do it later the */
@@ -647,7 +648,7 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 			/* timeout as if the device was gone. */
 			printk(KERN_WARNING "cciss%d: didn't find "
 				"c%db%dt%dl%d\n for removal.",
-				ctlr, hostno, removed[i].bus,
+				h->ctlr, hostno, removed[i].bus,
 				removed[i].target, removed[i].lun);
 		}
 	}
@@ -661,11 +662,11 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 			continue;
 		printk(KERN_WARNING "cciss%d: scsi_add_device "
 			"c%db%dt%dl%d failed, device not added.\n",
-			ctlr, hostno,
+			h->ctlr, hostno,
 			added[i].bus, added[i].target, added[i].lun);
 		/* now we have to remove it from ccissscsi, */
 		/* since it didn't get added to scsi mid layer */
-		fixup_botched_add(ctlr, added[i].scsi3addr);
+		fixup_botched_add(h, added[i].scsi3addr);
 	}
 
 free_and_out:
@@ -675,33 +676,33 @@ free_and_out:
 }
 
 static int
-lookup_scsi3addr(int ctlr, int bus, int target, int lun, char *scsi3addr)
+lookup_scsi3addr(ctlr_info_t *h, int bus, int target, int lun, char *scsi3addr)
 {
 	int i;
 	struct cciss_scsi_dev_t *sd;
 	unsigned long flags;
 
-	CPQ_TAPE_LOCK(ctlr, flags);
-	for (i=0;i<ccissscsi[ctlr].ndevices;i++) {
-		sd = &ccissscsi[ctlr].dev[i];
+	CPQ_TAPE_LOCK(h, flags);
+	for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
+		sd = &ccissscsi[h->ctlr].dev[i];
 		if (sd->bus == bus &&
 		    sd->target == target &&
 		    sd->lun == lun) {
 			memcpy(scsi3addr, &sd->scsi3addr[0], 8);
-			CPQ_TAPE_UNLOCK(ctlr, flags);
+			CPQ_TAPE_UNLOCK(h, flags);
 			return 0;
 		}
 	}
-	CPQ_TAPE_UNLOCK(ctlr, flags);
+	CPQ_TAPE_UNLOCK(h, flags);
 	return -1;
 }
 
 static void 
-cciss_scsi_setup(int cntl_num)
+cciss_scsi_setup(ctlr_info_t *h)
 {
 	struct cciss_scsi_adapter_data_t * shba;
 
-	ccissscsi[cntl_num].ndevices = 0;
+	ccissscsi[h->ctlr].ndevices = 0;
 	shba = (struct cciss_scsi_adapter_data_t *)
 		kmalloc(sizeof(*shba), GFP_KERNEL);	
 	if (shba == NULL)
@@ -709,35 +710,35 @@ cciss_scsi_setup(int cntl_num)
 	shba->scsi_host = NULL;
 	spin_lock_init(&shba->lock);
 	shba->registered = 0;
-	if (scsi_cmd_stack_setup(cntl_num, shba) != 0) {
+	if (scsi_cmd_stack_setup(h, shba) != 0) {
 		kfree(shba);
 		shba = NULL;
 	}
-	hba[cntl_num]->scsi_ctlr = shba;
+	h->scsi_ctlr = shba;
 	return;
 }
 
-static void
-complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
+static void complete_scsi_command(CommandList_struct *c, int timeout,
+	__u32 tag)
 {
 	struct scsi_cmnd *cmd;
-	ctlr_info_t *ctlr;
+	ctlr_info_t *h;
 	ErrorInfo_struct *ei;
 
-	ei = cp->err_info;
+	ei = c->err_info;
 
 	/* First, see if it was a message rather than a command */
-	if (cp->Request.Type.Type == TYPE_MSG)  {
-		cp->cmd_type = CMD_MSG_DONE;
+	if (c->Request.Type.Type == TYPE_MSG)  {
+		c->cmd_type = CMD_MSG_DONE;
 		return;
 	}
 
-	cmd = (struct scsi_cmnd *) cp->scsi_cmd;	
-	ctlr = hba[cp->ctlr];
+	cmd = (struct scsi_cmnd *) c->scsi_cmd;
+	h = hba[c->ctlr];
 
 	scsi_dma_unmap(cmd);
-	if (cp->Header.SGTotal > ctlr->max_cmd_sgentries)
-		cciss_unmap_sg_chain_block(ctlr, cp);
+	if (c->Header.SGTotal > h->max_cmd_sgentries)
+		cciss_unmap_sg_chain_block(h, c);
 
 	cmd->result = (DID_OK << 16); 		/* host byte */
 	cmd->result |= (COMMAND_COMPLETE << 8);	/* msg byte */
@@ -764,9 +765,8 @@ complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
                 		{
 #if 0
                     			printk(KERN_WARNING "cciss: cmd %p "
-					"has SCSI Status = %x\n",
-                        			cp,  
-						ei->ScsiStatus); 
+						"has SCSI Status = %x\n",
+						c, ei->ScsiStatus);
 #endif
 					cmd->result |= (ei->ScsiStatus << 1);
                 		}
@@ -786,13 +786,13 @@ complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
 			case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 			break;
 			case CMD_DATA_OVERRUN:
-				printk(KERN_WARNING "cciss: cp %p has"
+				printk(KERN_WARNING "cciss: %p has"
 					" completed with data overrun "
-					"reported\n", cp);
+					"reported\n", c);
 			break;
 			case CMD_INVALID: {
-				/* print_bytes(cp, sizeof(*cp), 1, 0);
-				print_cmd(cp); */
+				/* print_bytes(c, sizeof(*c), 1, 0);
+				print_cmd(c); */
      /* We get CMD_INVALID if you address a non-existent tape drive instead
 	of a selection timeout (no response).  You will see this if you yank 
 	out a tape drive, then try to access it. This is kind of a shame
@@ -802,54 +802,52 @@ complete_scsi_command( CommandList_struct *cp, int timeout, __u32 tag)
 				}
 			break;
 			case CMD_PROTOCOL_ERR:
-                                printk(KERN_WARNING "cciss: cp %p has "
-					"protocol error \n", cp);
+				printk(KERN_WARNING "cciss: %p has "
+					"protocol error\n", c);
                         break;
 			case CMD_HARDWARE_ERR:
 				cmd->result = DID_ERROR << 16;
-                                printk(KERN_WARNING "cciss: cp %p had " 
-                                        " hardware error\n", cp);
+				printk(KERN_WARNING "cciss: %p had "
+					" hardware error\n", c);
                         break;
 			case CMD_CONNECTION_LOST:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: cp %p had "
-					"connection lost\n", cp);
+				printk(KERN_WARNING "cciss: %p had "
+					"connection lost\n", c);
 			break;
 			case CMD_ABORTED:
 				cmd->result = DID_ABORT << 16;
-				printk(KERN_WARNING "cciss: cp %p was "
-					"aborted\n", cp);
+				printk(KERN_WARNING "cciss: %p was "
+					"aborted\n", c);
 			break;
 			case CMD_ABORT_FAILED:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: cp %p reports "
-					"abort failed\n", cp);
+				printk(KERN_WARNING "cciss: %p reports "
+					"abort failed\n", c);
 			break;
 			case CMD_UNSOLICITED_ABORT:
 				cmd->result = DID_ABORT << 16;
-				printk(KERN_WARNING "cciss: cp %p aborted "
-					"do to an unsolicited abort\n", cp);
+				printk(KERN_WARNING "cciss: %p aborted "
+					"do to an unsolicited abort\n", c);
 			break;
 			case CMD_TIMEOUT:
 				cmd->result = DID_TIME_OUT << 16;
-				printk(KERN_WARNING "cciss: cp %p timedout\n",
-					cp);
+				printk(KERN_WARNING "cciss: %p timedout\n",
+					c);
 			break;
 			default:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: cp %p returned "
-					"unknown status %x\n", cp, 
+				printk(KERN_WARNING "cciss: %p returned "
+					"unknown status %x\n", c,
 						ei->CommandStatus); 
 		}
 	}
-	// printk("c:%p:c%db%dt%dl%d ", cmd, ctlr->ctlr, cmd->channel, 
-	//	cmd->target, cmd->lun);
 	cmd->scsi_done(cmd);
-	scsi_cmd_free(ctlr, cp);
+	scsi_cmd_free(h, c);
 }
 
 static int
-cciss_scsi_detect(int ctlr)
+cciss_scsi_detect(ctlr_info_t *h)
 {
 	struct Scsi_Host *sh;
 	int error;
@@ -860,15 +858,15 @@ cciss_scsi_detect(int ctlr)
 	sh->io_port = 0;	// good enough?  FIXME, 
 	sh->n_io_port = 0;	// I don't think we use these two...
 	sh->this_id = SELF_SCSI_ID;  
-	sh->sg_tablesize = hba[ctlr]->maxsgentries;
+	sh->sg_tablesize = h->maxsgentries;
 	sh->max_cmd_len = MAX_COMMAND_SIZE;
 
 	((struct cciss_scsi_adapter_data_t *) 
-		hba[ctlr]->scsi_ctlr)->scsi_host = sh;
-	sh->hostdata[0] = (unsigned long) hba[ctlr];
-	sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT];
+		h->scsi_ctlr)->scsi_host = sh;
+	sh->hostdata[0] = (unsigned long) h;
+	sh->irq = h->intr[SIMPLE_MODE_INT];
 	sh->unique_id = sh->irq;
-	error = scsi_add_host(sh, &hba[ctlr]->pdev->dev);
+	error = scsi_add_host(sh, &h->pdev->dev);
 	if (error)
 		goto fail_host_put;
 	scsi_scan_host(sh);
@@ -882,20 +880,20 @@ cciss_scsi_detect(int ctlr)
 
 static void
 cciss_unmap_one(struct pci_dev *pdev,
-		CommandList_struct *cp,
+		CommandList_struct *c,
 		size_t buflen,
 		int data_direction)
 {
 	u64bit addr64;
 
-	addr64.val32.lower = cp->SG[0].Addr.lower;
-	addr64.val32.upper = cp->SG[0].Addr.upper;
+	addr64.val32.lower = c->SG[0].Addr.lower;
+	addr64.val32.upper = c->SG[0].Addr.upper;
 	pci_unmap_single(pdev, (dma_addr_t) addr64.val, buflen, data_direction);
 }
 
 static void
 cciss_map_one(struct pci_dev *pdev,
-		CommandList_struct *cp,
+		CommandList_struct *c,
 		unsigned char *buf,
 		size_t buflen,
 		int data_direction)
@@ -903,18 +901,18 @@ cciss_map_one(struct pci_dev *pdev,
 	__u64 addr64;
 
 	addr64 = (__u64) pci_map_single(pdev, buf, buflen, data_direction);
-	cp->SG[0].Addr.lower = 
+	c->SG[0].Addr.lower =
 	  (__u32) (addr64 & (__u64) 0x00000000FFFFFFFF);
-	cp->SG[0].Addr.upper =
+	c->SG[0].Addr.upper =
 	  (__u32) ((addr64 >> 32) & (__u64) 0x00000000FFFFFFFF);
-	cp->SG[0].Len = buflen;
-	cp->Header.SGList = (__u8) 1;   /* no. SGs contig in this cmd */
-	cp->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
+	c->SG[0].Len = buflen;
+	c->Header.SGList = (__u8) 1;   /* no. SGs contig in this cmd */
+	c->Header.SGTotal = (__u16) 1; /* total sgs in this cmd list */
 }
 
 static int
-cciss_scsi_do_simple_cmd(ctlr_info_t *c,
-			CommandList_struct *cp,
+cciss_scsi_do_simple_cmd(ctlr_info_t *h,
+			CommandList_struct *c,
 			unsigned char *scsi3addr, 
 			unsigned char *cdb,
 			unsigned char cdblen,
@@ -923,53 +921,52 @@ cciss_scsi_do_simple_cmd(ctlr_info_t *c,
 {
 	DECLARE_COMPLETION_ONSTACK(wait);
 
-	cp->cmd_type = CMD_IOCTL_PEND;		// treat this like an ioctl 
-	cp->scsi_cmd = NULL;
-	cp->Header.ReplyQueue = 0;  // unused in simple mode
-	memcpy(&cp->Header.LUN, scsi3addr, sizeof(cp->Header.LUN));
-	cp->Header.Tag.lower = cp->busaddr;  // Use k. address of cmd as tag
+	c->cmd_type = CMD_IOCTL_PEND; /* treat this like an ioctl */
+	c->scsi_cmd = NULL;
+	c->Header.ReplyQueue = 0;  /* unused in simple mode */
+	memcpy(&c->Header.LUN, scsi3addr, sizeof(c->Header.LUN));
+	c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
 	// Fill in the request block...
 
 	/* printk("Using scsi3addr 0x%02x%0x2%0x2%0x2%0x2%0x2%0x2%0x2\n", 
 		scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
 		scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]); */
 
-	memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
-	memcpy(cp->Request.CDB, cdb, cdblen);
-	cp->Request.Timeout = 0;
-	cp->Request.CDBLen = cdblen;
-	cp->Request.Type.Type = TYPE_CMD;
-	cp->Request.Type.Attribute = ATTR_SIMPLE;
-	cp->Request.Type.Direction = direction;
+	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
+	memcpy(c->Request.CDB, cdb, cdblen);
+	c->Request.Timeout = 0;
+	c->Request.CDBLen = cdblen;
+	c->Request.Type.Type = TYPE_CMD;
+	c->Request.Type.Attribute = ATTR_SIMPLE;
+	c->Request.Type.Direction = direction;
 
 	/* Fill in the SG list and do dma mapping */
-	cciss_map_one(c->pdev, cp, (unsigned char *) buf,
+	cciss_map_one(h->pdev, c, (unsigned char *) buf,
 			bufsize, DMA_FROM_DEVICE); 
 
-	cp->waiting = &wait;
-	enqueue_cmd_and_start_io(c, cp);
+	c->waiting = &wait;
+	enqueue_cmd_and_start_io(h, c);
 	wait_for_completion(&wait);
 
 	/* undo the dma mapping */
-	cciss_unmap_one(c->pdev, cp, bufsize, DMA_FROM_DEVICE);
+	cciss_unmap_one(h->pdev, c, bufsize, DMA_FROM_DEVICE);
 	return(0);
 }
 
 static void 
-cciss_scsi_interpret_error(CommandList_struct *cp)
+cciss_scsi_interpret_error(CommandList_struct *c)
 {
 	ErrorInfo_struct *ei;
 
-	ei = cp->err_info; 
+	ei = c->err_info;
 	switch(ei->CommandStatus)
 	{
 		case CMD_TARGET_STATUS:
 			printk(KERN_WARNING "cciss: cmd %p has "
-				"completed with errors\n", cp);
+				"completed with errors\n", c);
 			printk(KERN_WARNING "cciss: cmd %p "
 				"has SCSI Status = %x\n",
-					cp,  
-					ei->ScsiStatus);
+					c, ei->ScsiStatus);
 			if (ei->ScsiStatus == 0)
 				printk(KERN_WARNING 
 				"cciss:SCSI status is abnormally zero.  "
@@ -981,78 +978,75 @@ cciss_scsi_interpret_error(CommandList_struct *cp)
 			printk("UNDERRUN\n");
 		break;
 		case CMD_DATA_OVERRUN:
-			printk(KERN_WARNING "cciss: cp %p has"
+			printk(KERN_WARNING "cciss: %p has"
 				" completed with data overrun "
-				"reported\n", cp);
+				"reported\n", c);
 		break;
 		case CMD_INVALID: {
 			/* controller unfortunately reports SCSI passthru's */
 			/* to non-existent targets as invalid commands. */
-			printk(KERN_WARNING "cciss: cp %p is "
+			printk(KERN_WARNING "cciss: %p is "
 				"reported invalid (probably means "
-				"target device no longer present)\n", 
-				cp); 
-			/* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0);
-			print_cmd(cp);  */
+				"target device no longer present)\n", c);
+			/* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
+			print_cmd(c);  */
 			}
 		break;
 		case CMD_PROTOCOL_ERR:
-			printk(KERN_WARNING "cciss: cp %p has "
-				"protocol error \n", cp);
+			printk(KERN_WARNING "cciss: %p has "
+				"protocol error\n", c);
 		break;
 		case CMD_HARDWARE_ERR:
 			/* cmd->result = DID_ERROR << 16; */
-			printk(KERN_WARNING "cciss: cp %p had " 
-				" hardware error\n", cp);
+			printk(KERN_WARNING "cciss: %p had "
+				" hardware error\n", c);
 		break;
 		case CMD_CONNECTION_LOST:
-			printk(KERN_WARNING "cciss: cp %p had "
-				"connection lost\n", cp);
+			printk(KERN_WARNING "cciss: %p had "
+				"connection lost\n", c);
 		break;
 		case CMD_ABORTED:
-			printk(KERN_WARNING "cciss: cp %p was "
-				"aborted\n", cp);
+			printk(KERN_WARNING "cciss: %p was "
+				"aborted\n", c);
 		break;
 		case CMD_ABORT_FAILED:
-			printk(KERN_WARNING "cciss: cp %p reports "
-				"abort failed\n", cp);
+			printk(KERN_WARNING "cciss: %p reports "
+				"abort failed\n", c);
 		break;
 		case CMD_UNSOLICITED_ABORT:
-			printk(KERN_WARNING "cciss: cp %p aborted "
-				"do to an unsolicited abort\n", cp);
+			printk(KERN_WARNING "cciss: %p aborted "
+				"do to an unsolicited abort\n", c);
 		break;
 		case CMD_TIMEOUT:
-			printk(KERN_WARNING "cciss: cp %p timedout\n",
-				cp);
+			printk(KERN_WARNING "cciss: %p timedout\n", c);
 		break;
 		default:
-			printk(KERN_WARNING "cciss: cp %p returned "
-				"unknown status %x\n", cp, 
-					ei->CommandStatus); 
+			printk(KERN_WARNING "cciss: %p returned "
+				"unknown status %x\n", c, ei->CommandStatus);
 	}
 }
 
 static int
-cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, 
+cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
 	unsigned char page, unsigned char *buf,
 	unsigned char bufsize)
 {
 	int rc;
-	CommandList_struct *cp;
+	CommandList_struct *c;
 	char cdb[6];
 	ErrorInfo_struct *ei;
 	unsigned long flags;
 
-	spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
-	cp = scsi_cmd_alloc(c);
-	spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
+	c = scsi_cmd_alloc(h);
+	spin_unlock_irqrestore(&h->lock, flags);
 
-	if (cp == NULL) {			/* trouble... */
+	if (c == NULL) {			/* trouble... */
 		printk("cmd_alloc returned NULL!\n");
 		return -1;
 	}
 
-	ei = cp->err_info; 
+	ei = c->err_info;
 
 	cdb[0] = CISS_INQUIRY;
 	cdb[1] = (page != 0);
@@ -1060,24 +1054,24 @@ cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr,
 	cdb[3] = 0;
 	cdb[4] = bufsize;
 	cdb[5] = 0;
-	rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, cdb, 
+	rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr, cdb,
 				6, buf, bufsize, XFER_READ);
 
 	if (rc != 0) return rc; /* something went wrong */
 
 	if (ei->CommandStatus != 0 && 
 	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
-		cciss_scsi_interpret_error(cp);
+		cciss_scsi_interpret_error(c);
 		rc = -1;
 	}
-	spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
-	scsi_cmd_free(c, cp);
-	spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
+	scsi_cmd_free(h, c);
+	spin_unlock_irqrestore(&h->lock, flags);
 	return rc;	
 }
 
 /* Get the device id from inquiry page 0x83 */
-static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr,
+static int cciss_scsi_get_device_id(ctlr_info_t *h, unsigned char *scsi3addr,
 	unsigned char *device_id, int buflen)
 {
 	int rc;
@@ -1088,7 +1082,7 @@ static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr,
 	buf = kzalloc(64, GFP_KERNEL);
 	if (!buf)
 		return -1;
-	rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64);
+	rc = cciss_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64);
 	if (rc == 0)
 		memcpy(device_id, &buf[8], buflen);
 	kfree(buf);
@@ -1096,20 +1090,20 @@ static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr,
 }
 
 static int
-cciss_scsi_do_report_phys_luns(ctlr_info_t *c, 
+cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
 		ReportLunData_struct *buf, int bufsize)
 {
 	int rc;
-	CommandList_struct *cp;
+	CommandList_struct *c;
 	unsigned char cdb[12];
 	unsigned char scsi3addr[8]; 
 	ErrorInfo_struct *ei;
 	unsigned long flags;
 
-	spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
-	cp = scsi_cmd_alloc(c);
-	spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
-	if (cp == NULL) {			/* trouble... */
+	spin_lock_irqsave(&h->lock, flags);
+	c = scsi_cmd_alloc(h);
+	spin_unlock_irqrestore(&h->lock, flags);
+	if (c == NULL) {			/* trouble... */
 		printk("cmd_alloc returned NULL!\n");
 		return -1;
 	}
@@ -1128,27 +1122,27 @@ cciss_scsi_do_report_phys_luns(ctlr_info_t *c,
 	cdb[10] = 0;
 	cdb[11] = 0;
 
-	rc = cciss_scsi_do_simple_cmd(c, cp, scsi3addr, 
+	rc = cciss_scsi_do_simple_cmd(h, c, scsi3addr,
 				cdb, 12, 
 				(unsigned char *) buf, 
 				bufsize, XFER_READ);
 
 	if (rc != 0) return rc; /* something went wrong */
 
-	ei = cp->err_info; 
+	ei = c->err_info;
 	if (ei->CommandStatus != 0 && 
 	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
-		cciss_scsi_interpret_error(cp);
+		cciss_scsi_interpret_error(c);
 		rc = -1;
 	}
-	spin_lock_irqsave(CCISS_LOCK(c->ctlr), flags);
-	scsi_cmd_free(c, cp);
-	spin_unlock_irqrestore(CCISS_LOCK(c->ctlr), flags);
+	spin_lock_irqsave(&h->lock, flags);
+	scsi_cmd_free(h, c);
+	spin_unlock_irqrestore(&h->lock, flags);
 	return rc;	
 }
 
 static void
-cciss_update_non_disk_devices(int cntl_num, int hostno)
+cciss_update_non_disk_devices(ctlr_info_t *h, int hostno)
 {
 	/* the idea here is we could get notified from /proc
 	   that some devices have changed, so we do a report 
@@ -1181,7 +1175,6 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 	ReportLunData_struct *ld_buff;
 	unsigned char *inq_buff;
 	unsigned char scsi3addr[8];
-	ctlr_info_t *c;
 	__u32 num_luns=0;
 	unsigned char *ch;
 	struct cciss_scsi_dev_t *currentsd, *this_device;
@@ -1189,7 +1182,6 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 	int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
 	int i;
 
-	c = (ctlr_info_t *) hba[cntl_num];	
 	ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
 	inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
 	currentsd = kzalloc(sizeof(*currentsd) *
@@ -1199,7 +1191,7 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 		goto out;
 	}
 	this_device = &currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
-	if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) {
+	if (cciss_scsi_do_report_phys_luns(h, ld_buff, reportlunsize) == 0) {
 		ch = &ld_buff->LUNListLength[0];
 		num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
 		if (num_luns > CISS_MAX_PHYS_LUN) {
@@ -1223,7 +1215,7 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 		memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
 		memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
 
-		if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff,
+		if (cciss_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
 			(unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
 			/* Inquiry failed (msg printed already) */
 			continue; /* so we will skip this device. */
@@ -1241,7 +1233,7 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 			sizeof(this_device->revision));
 		memset(this_device->device_id, 0,
 			sizeof(this_device->device_id));
-		cciss_scsi_get_device_id(hba[cntl_num], scsi3addr,
+		cciss_scsi_get_device_id(h, scsi3addr,
 			this_device->device_id, sizeof(this_device->device_id));
 
 		switch (this_device->devtype)
@@ -1268,7 +1260,7 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 		  case 0x08: /* medium changer */
 			if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
 				printk(KERN_INFO "cciss%d: %s ignored, "
-					"too many devices.\n", cntl_num,
+					"too many devices.\n", h->ctlr,
 					scsi_device_type(this_device->devtype));
 				break;
 			}
@@ -1280,7 +1272,7 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 		}
 	}
 
-	adjust_cciss_scsi_table(cntl_num, hostno, currentsd, ncurrent);
+	adjust_cciss_scsi_table(h, hostno, currentsd, ncurrent);
 out:
 	kfree(inq_buff);
 	kfree(ld_buff);
@@ -1299,12 +1291,12 @@ is_keyword(char *ptr, int len, char *verb)  // Thanks to ncr53c8xx.c
 }
 
 static int
-cciss_scsi_user_command(int ctlr, int hostno, char *buffer, int length)
+cciss_scsi_user_command(ctlr_info_t *h, int hostno, char *buffer, int length)
 {
 	int arg_len;
 
 	if ((arg_len = is_keyword(buffer, length, "rescan")) != 0)
-		cciss_update_non_disk_devices(ctlr, hostno);
+		cciss_update_non_disk_devices(h, hostno);
 	else
 		return -EINVAL;
 	return length;
@@ -1321,20 +1313,16 @@ cciss_scsi_proc_info(struct Scsi_Host *sh,
 {
 
 	int buflen, datalen;
-	ctlr_info_t *ci;
+	ctlr_info_t *h;
 	int i;
-	int cntl_num;
 
-
-	ci = (ctlr_info_t *) sh->hostdata[0];
-	if (ci == NULL)  /* This really shouldn't ever happen. */
+	h = (ctlr_info_t *) sh->hostdata[0];
+	if (h == NULL)  /* This really shouldn't ever happen. */
 		return -EINVAL;
 
-	cntl_num = ci->ctlr;	/* Get our index into the hba[] array */
-
 	if (func == 0) {	/* User is reading from /proc/scsi/ciss*?/?*  */
 		buflen = sprintf(buffer, "cciss%d: SCSI host: %d\n",
-				cntl_num, sh->host_no);
+				h->ctlr, sh->host_no);
 
 		/* this information is needed by apps to know which cciss
 		   device corresponds to which scsi host number without
@@ -1344,8 +1332,9 @@ cciss_scsi_proc_info(struct Scsi_Host *sh,
 		   this info is for an app to be able to use to know how to
 		   get them back in sync. */
 
-		for (i=0;i<ccissscsi[cntl_num].ndevices;i++) {
-			struct cciss_scsi_dev_t *sd = &ccissscsi[cntl_num].dev[i];
+		for (i = 0; i < ccissscsi[h->ctlr].ndevices; i++) {
+			struct cciss_scsi_dev_t *sd =
+				&ccissscsi[h->ctlr].dev[i];
 			buflen += sprintf(&buffer[buflen], "c%db%dt%dl%d %02d "
 				"0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 				sh->host_no, sd->bus, sd->target, sd->lun,
@@ -1363,15 +1352,15 @@ cciss_scsi_proc_info(struct Scsi_Host *sh,
 			*start = buffer + offset;
 		return(datalen);
 	} else 	/* User is writing to /proc/scsi/cciss*?/?*  ... */
-		return cciss_scsi_user_command(cntl_num, sh->host_no,
+		return cciss_scsi_user_command(h, sh->host_no,
 			buffer, length);	
 } 
 
 /* cciss_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci 
    dma mapping  and fills in the scatter gather entries of the 
-   cciss command, cp. */
+   cciss command, c. */
 
-static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
+static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *c,
 	struct scsi_cmnd *cmd)
 {
 	unsigned int len;
@@ -1385,7 +1374,7 @@ static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
 
 	chained = 0;
 	sg_index = 0;
-	curr_sg = cp->SG;
+	curr_sg = c->SG;
 	request_nsgs = scsi_dma_map(cmd);
 	if (request_nsgs) {
 		scsi_for_each_sg(cmd, sg, request_nsgs, i) {
@@ -1393,7 +1382,7 @@ static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
 				!chained && request_nsgs - i > 1) {
 				chained = 1;
 				sg_index = 0;
-				curr_sg = sa->cmd_sg_list[cp->cmdindex];
+				curr_sg = sa->cmd_sg_list[c->cmdindex];
 			}
 			addr64 = (__u64) sg_dma_address(sg);
 			len  = sg_dma_len(sg);
@@ -1406,19 +1395,19 @@ static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
 			++sg_index;
 		}
 		if (chained)
-			cciss_map_sg_chain_block(h, cp,
-				sa->cmd_sg_list[cp->cmdindex],
+			cciss_map_sg_chain_block(h, c,
+				sa->cmd_sg_list[c->cmdindex],
 				(request_nsgs - (h->max_cmd_sgentries - 1)) *
 					sizeof(SGDescriptor_struct));
 	}
 	/* track how many SG entries we are using */
 	if (request_nsgs > h->maxSG)
 		h->maxSG = request_nsgs;
-	cp->Header.SGTotal = (__u8) request_nsgs + chained;
+	c->Header.SGTotal = (__u8) request_nsgs + chained;
 	if (request_nsgs > h->max_cmd_sgentries)
-		cp->Header.SGList = h->max_cmd_sgentries;
+		c->Header.SGList = h->max_cmd_sgentries;
 	else
-		cp->Header.SGList = cp->Header.SGTotal;
+		c->Header.SGList = c->Header.SGTotal;
 	return;
 }
 
@@ -1426,18 +1415,17 @@ static void cciss_scatter_gather(ctlr_info_t *h, CommandList_struct *cp,
 static int
 cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
 {
-	ctlr_info_t *c;
-	int ctlr, rc;
+	ctlr_info_t *h;
+	int rc;
 	unsigned char scsi3addr[8];
-	CommandList_struct *cp;
+	CommandList_struct *c;
 	unsigned long flags;
 
 	// Get the ptr to our adapter structure (hba[i]) out of cmd->host.
 	// We violate cmd->host privacy here.  (Is there another way?)
-	c = (ctlr_info_t *) cmd->device->host->hostdata[0];
-	ctlr = c->ctlr;
+	h = (ctlr_info_t *) cmd->device->host->hostdata[0];
 
-	rc = lookup_scsi3addr(ctlr, cmd->device->channel, cmd->device->id, 
+	rc = lookup_scsi3addr(h, cmd->device->channel, cmd->device->id,
 			cmd->device->lun, scsi3addr);
 	if (rc != 0) {
 		/* the scsi nexus does not match any that we presented... */
@@ -1449,18 +1437,13 @@ cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd
 		return 0;
 	}
 
-	/* printk("cciss_queue_command, p=%p, cmd=0x%02x, c%db%dt%dl%d\n", 
-		cmd, cmd->cmnd[0], ctlr, cmd->channel, cmd->target, cmd->lun);*/
-	// printk("q:%p:c%db%dt%dl%d ", cmd, ctlr, cmd->channel, 
-	//	cmd->target, cmd->lun);
-
 	/* Ok, we have a reasonable scsi nexus, so send the cmd down, and
            see what the device thinks of it. */
 
-	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-	cp = scsi_cmd_alloc(c);
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
-	if (cp == NULL) {			/* trouble... */
+	spin_lock_irqsave(&h->lock, flags);
+	c = scsi_cmd_alloc(h);
+	spin_unlock_irqrestore(&h->lock, flags);
+	if (c == NULL) {			/* trouble... */
 		printk("scsi_cmd_alloc returned NULL!\n");
 		/* FIXME: next 3 lines are -> BAD! <- */
 		cmd->result = DID_NO_CONNECT << 16;
@@ -1472,35 +1455,41 @@ cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd
 
 	cmd->scsi_done = done;    // save this for use by completion code 
 
-	// save cp in case we have to abort it 
-	cmd->host_scribble = (unsigned char *) cp; 
+	/* save c in case we have to abort it */
+	cmd->host_scribble = (unsigned char *) c;
 
-	cp->cmd_type = CMD_SCSI;
-	cp->scsi_cmd = cmd;
-	cp->Header.ReplyQueue = 0;  // unused in simple mode
-	memcpy(&cp->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
-	cp->Header.Tag.lower = cp->busaddr;  // Use k. address of cmd as tag
+	c->cmd_type = CMD_SCSI;
+	c->scsi_cmd = cmd;
+	c->Header.ReplyQueue = 0;  /* unused in simple mode */
+	memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
+	c->Header.Tag.lower = c->busaddr;  /* Use k. address of cmd as tag */
 	
 	// Fill in the request block...
 
-	cp->Request.Timeout = 0;
-	memset(cp->Request.CDB, 0, sizeof(cp->Request.CDB));
-	BUG_ON(cmd->cmd_len > sizeof(cp->Request.CDB));
-	cp->Request.CDBLen = cmd->cmd_len;
-	memcpy(cp->Request.CDB, cmd->cmnd, cmd->cmd_len);
-	cp->Request.Type.Type = TYPE_CMD;
-	cp->Request.Type.Attribute = ATTR_SIMPLE;
+	c->Request.Timeout = 0;
+	memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
+	BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
+	c->Request.CDBLen = cmd->cmd_len;
+	memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
+	c->Request.Type.Type = TYPE_CMD;
+	c->Request.Type.Attribute = ATTR_SIMPLE;
 	switch(cmd->sc_data_direction)
 	{
-	  case DMA_TO_DEVICE: cp->Request.Type.Direction = XFER_WRITE; break;
-	  case DMA_FROM_DEVICE: cp->Request.Type.Direction = XFER_READ; break;
-	  case DMA_NONE: cp->Request.Type.Direction = XFER_NONE; break;
+	  case DMA_TO_DEVICE:
+		c->Request.Type.Direction = XFER_WRITE;
+		break;
+	  case DMA_FROM_DEVICE:
+		c->Request.Type.Direction = XFER_READ;
+		break;
+	  case DMA_NONE:
+		c->Request.Type.Direction = XFER_NONE;
+		break;
 	  case DMA_BIDIRECTIONAL:
 		// This can happen if a buggy application does a scsi passthru
 		// and sets both inlen and outlen to non-zero. ( see
 		// ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
 
-	  	cp->Request.Type.Direction = XFER_RSVD;
+		c->Request.Type.Direction = XFER_RSVD;
 		// This is technically wrong, and cciss controllers should
 		// reject it with CMD_INVALID, which is the most correct 
 		// response, but non-fibre backends appear to let it 
@@ -1516,14 +1505,13 @@ cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd
 		BUG();
 		break;
 	}
-	cciss_scatter_gather(c, cp, cmd);
-	enqueue_cmd_and_start_io(c, cp);
+	cciss_scatter_gather(h, c, cmd);
+	enqueue_cmd_and_start_io(h, c);
 	/* the cmd'll come back via intr handler in complete_scsi_command()  */
 	return 0;
 }
 
-static void 
-cciss_unregister_scsi(int ctlr)
+static void cciss_unregister_scsi(ctlr_info_t *h)
 {
 	struct cciss_scsi_adapter_data_t *sa;
 	struct cciss_scsi_cmd_stack_t *stk;
@@ -1531,59 +1519,59 @@ cciss_unregister_scsi(int ctlr)
 
 	/* we are being forcibly unloaded, and may not refuse. */
 
-	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-	sa = hba[ctlr]->scsi_ctlr;
+	spin_lock_irqsave(&h->lock, flags);
+	sa = h->scsi_ctlr;
 	stk = &sa->cmd_stack; 
 
 	/* if we weren't ever actually registered, don't unregister */ 
 	if (sa->registered) {
-		spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+		spin_unlock_irqrestore(&h->lock, flags);
 		scsi_remove_host(sa->scsi_host);
 		scsi_host_put(sa->scsi_host);
-		spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
+		spin_lock_irqsave(&h->lock, flags);
 	}
 
 	/* set scsi_host to NULL so our detect routine will 
 	   find us on register */
 	sa->scsi_host = NULL;
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
-	scsi_cmd_stack_free(ctlr);
+	spin_unlock_irqrestore(&h->lock, flags);
+	scsi_cmd_stack_free(h);
 	kfree(sa);
 }
 
-static int 
-cciss_engage_scsi(int ctlr)
+static int cciss_engage_scsi(ctlr_info_t *h)
 {
 	struct cciss_scsi_adapter_data_t *sa;
 	struct cciss_scsi_cmd_stack_t *stk;
 	unsigned long flags;
 
-	spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
-	sa = hba[ctlr]->scsi_ctlr;
+	spin_lock_irqsave(&h->lock, flags);
+	sa = h->scsi_ctlr;
 	stk = &sa->cmd_stack; 
 
 	if (sa->registered) {
-		printk("cciss%d: SCSI subsystem already engaged.\n", ctlr);
-		spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
+		printk(KERN_INFO "cciss%d: SCSI subsystem already engaged.\n",
+			h->ctlr);
+		spin_unlock_irqrestore(&h->lock, flags);
 		return -ENXIO;
 	}
 	sa->registered = 1;
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
-	cciss_update_non_disk_devices(ctlr, -1);
-	cciss_scsi_detect(ctlr);
+	spin_unlock_irqrestore(&h->lock, flags);
+	cciss_update_non_disk_devices(h, -1);
+	cciss_scsi_detect(h);
 	return 0;
 }
 
 static void
-cciss_seq_tape_report(struct seq_file *seq, int ctlr)
+cciss_seq_tape_report(struct seq_file *seq, ctlr_info_t *h)
 {
 	unsigned long flags;
 
-	CPQ_TAPE_LOCK(ctlr, flags);
+	CPQ_TAPE_LOCK(h, flags);
 	seq_printf(seq,
 		"Sequential access devices: %d\n\n",
-			ccissscsi[ctlr].ndevices);
-	CPQ_TAPE_UNLOCK(ctlr, flags);
+			ccissscsi[h->ctlr].ndevices);
+	CPQ_TAPE_UNLOCK(h, flags);
 }
 
 static int wait_for_device_to_become_ready(ctlr_info_t *h,
@@ -1615,7 +1603,7 @@ static int wait_for_device_to_become_ready(ctlr_info_t *h,
 			waittime = waittime * 2;
 
 		/* Send the Test Unit Ready */
-		rc = fill_cmd(c, TEST_UNIT_READY, h->ctlr, NULL, 0, 0,
+		rc = fill_cmd(h, c, TEST_UNIT_READY, NULL, 0, 0,
 			lunaddr, TYPE_CMD);
 		if (rc == 0)
 			rc = sendcmd_withirq_core(h, c, 0);
@@ -1672,26 +1660,25 @@ static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
 	int rc;
 	CommandList_struct *cmd_in_trouble;
 	unsigned char lunaddr[8];
-	ctlr_info_t *c;
-	int ctlr;
+	ctlr_info_t *h;
 
 	/* find the controller to which the command to be aborted was sent */
-	c = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
-	if (c == NULL) /* paranoia */
+	h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
+	if (h == NULL) /* paranoia */
 		return FAILED;
-	ctlr = c->ctlr;
-	printk(KERN_WARNING "cciss%d: resetting tape drive or medium changer.\n", ctlr);
+	printk(KERN_WARNING
+		"cciss%d: resetting tape drive or medium changer.\n", h->ctlr);
 	/* find the command that's giving us trouble */
 	cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
 	if (cmd_in_trouble == NULL) /* paranoia */
 		return FAILED;
 	memcpy(lunaddr, &cmd_in_trouble->Header.LUN.LunAddrBytes[0], 8);
 	/* send a reset to the SCSI LUN which the command was sent to */
-	rc = sendcmd_withirq(CCISS_RESET_MSG, ctlr, NULL, 0, 0, lunaddr,
+	rc = sendcmd_withirq(h, CCISS_RESET_MSG, NULL, 0, 0, lunaddr,
 		TYPE_MSG);
-	if (rc == 0 && wait_for_device_to_become_ready(c, lunaddr) == 0)
+	if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
 		return SUCCESS;
-	printk(KERN_WARNING "cciss%d: resetting device failed.\n", ctlr);
+	printk(KERN_WARNING "cciss%d: resetting device failed.\n", h->ctlr);
 	return FAILED;
 }
 
@@ -1700,22 +1687,20 @@ static int  cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
 	int rc;
 	CommandList_struct *cmd_to_abort;
 	unsigned char lunaddr[8];
-	ctlr_info_t *c;
-	int ctlr;
+	ctlr_info_t *h;
 
 	/* find the controller to which the command to be aborted was sent */
-	c = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
-	if (c == NULL) /* paranoia */
+	h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
+	if (h == NULL) /* paranoia */
 		return FAILED;
-	ctlr = c->ctlr;
-	printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", ctlr);
+	printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", h->ctlr);
 
 	/* find the command to be aborted */
 	cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
 	if (cmd_to_abort == NULL) /* paranoia */
 		return FAILED;
 	memcpy(lunaddr, &cmd_to_abort->Header.LUN.LunAddrBytes[0], 8);
-	rc = sendcmd_withirq(CCISS_ABORT_MSG, ctlr, &cmd_to_abort->Header.Tag,
+	rc = sendcmd_withirq(h, CCISS_ABORT_MSG, &cmd_to_abort->Header.Tag,
 		0, 0, lunaddr, TYPE_MSG);
 	if (rc == 0)
 		return SUCCESS;
-- 
cgit v1.2.3


From 6b4d96b878d67c6768766e682c188a2a8bdc804a Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:43 -0500
Subject: cciss: separate cmd_alloc() and cmd_special_alloc()

cciss: separate cmd_alloc() and cmd_special_alloc()
cmd_alloc() took a parameter which caused it to either allocate
from a pre-allocated pool, or allocate using pci_alloc_consistent.
This parameter is always known at compile time, so this would
be better handled by breaking the function into two functions
and differentiating the cases by function names.  Same goes
for cmd_free().

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c      | 153 ++++++++++++++++++++++++---------------------
 drivers/block/cciss_scsi.c |  10 +--
 2 files changed, 89 insertions(+), 74 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 70ad24f3604f..1dc95740b3bb 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -907,60 +907,73 @@ static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
 /*
  * For operations that cannot sleep, a command block is allocated at init,
  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
- * which ones are free or in use.  For operations that can wait for kmalloc
- * to possible sleep, this routine can be called with get_from_pool set to 0.
- * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
+ * which ones are free or in use.
  */
-static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
+static CommandList_struct *cmd_alloc(ctlr_info_t *h)
 {
 	CommandList_struct *c;
 	int i;
 	u64bit temp64;
 	dma_addr_t cmd_dma_handle, err_dma_handle;
 
-	if (!get_from_pool) {
-		c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
-			sizeof(CommandList_struct), &cmd_dma_handle);
-		if (c == NULL)
+	do {
+		i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
+		if (i == h->nr_cmds)
 			return NULL;
-		memset(c, 0, sizeof(CommandList_struct));
+	} while (test_and_set_bit(i & (BITS_PER_LONG - 1),
+		  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
+#ifdef CCISS_DEBUG
+	printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
+#endif
+	c = h->cmd_pool + i;
+	memset(c, 0, sizeof(CommandList_struct));
+	cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct);
+	c->err_info = h->errinfo_pool + i;
+	memset(c->err_info, 0, sizeof(ErrorInfo_struct));
+	err_dma_handle = h->errinfo_pool_dhandle
+	    + i * sizeof(ErrorInfo_struct);
+	h->nr_allocs++;
 
-		c->cmdindex = -1;
+	c->cmdindex = i;
 
-		c->err_info = (ErrorInfo_struct *)
-		    pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
-			    &err_dma_handle);
+	INIT_HLIST_NODE(&c->list);
+	c->busaddr = (__u32) cmd_dma_handle;
+	temp64.val = (__u64) err_dma_handle;
+	c->ErrDesc.Addr.lower = temp64.val32.lower;
+	c->ErrDesc.Addr.upper = temp64.val32.upper;
+	c->ErrDesc.Len = sizeof(ErrorInfo_struct);
 
-		if (c->err_info == NULL) {
-			pci_free_consistent(h->pdev,
-				sizeof(CommandList_struct), c, cmd_dma_handle);
-			return NULL;
-		}
-		memset(c->err_info, 0, sizeof(ErrorInfo_struct));
-	} else {		/* get it out of the controllers pool */
-
-		do {
-			i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
-			if (i == h->nr_cmds)
-				return NULL;
-		} while (test_and_set_bit
-			 (i & (BITS_PER_LONG - 1),
-			  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
-#ifdef CCISS_DEBUG
-		printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
-#endif
-		c = h->cmd_pool + i;
-		memset(c, 0, sizeof(CommandList_struct));
-		cmd_dma_handle = h->cmd_pool_dhandle
-		    + i * sizeof(CommandList_struct);
-		c->err_info = h->errinfo_pool + i;
-		memset(c->err_info, 0, sizeof(ErrorInfo_struct));
-		err_dma_handle = h->errinfo_pool_dhandle
-		    + i * sizeof(ErrorInfo_struct);
-		h->nr_allocs++;
+	c->ctlr = h->ctlr;
+	return c;
+}
+
+/* allocate a command using pci_alloc_consistent, used for ioctls,
+ * etc., not for the main i/o path.
+ */
+static CommandList_struct *cmd_special_alloc(ctlr_info_t *h)
+{
+	CommandList_struct *c;
+	u64bit temp64;
+	dma_addr_t cmd_dma_handle, err_dma_handle;
+
+	c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
+		sizeof(CommandList_struct), &cmd_dma_handle);
+	if (c == NULL)
+		return NULL;
+	memset(c, 0, sizeof(CommandList_struct));
+
+	c->cmdindex = -1;
+
+	c->err_info = (ErrorInfo_struct *)
+	    pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
+		    &err_dma_handle);
 
-		c->cmdindex = i;
+	if (c->err_info == NULL) {
+		pci_free_consistent(h->pdev,
+			sizeof(CommandList_struct), c, cmd_dma_handle);
+		return NULL;
 	}
+	memset(c->err_info, 0, sizeof(ErrorInfo_struct));
 
 	INIT_HLIST_NODE(&c->list);
 	c->busaddr = (__u32) cmd_dma_handle;
@@ -973,27 +986,26 @@ static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
 	return c;
 }
 
-/*
- * Frees a command block that was previously allocated with cmd_alloc().
- */
-static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
+static void cmd_free(ctlr_info_t *h, CommandList_struct *c)
 {
 	int i;
+
+	i = c - h->cmd_pool;
+	clear_bit(i & (BITS_PER_LONG - 1),
+		  h->cmd_pool_bits + (i / BITS_PER_LONG));
+	h->nr_frees++;
+}
+
+static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c)
+{
 	u64bit temp64;
 
-	if (!got_from_pool) {
-		temp64.val32.lower = c->ErrDesc.Addr.lower;
-		temp64.val32.upper = c->ErrDesc.Addr.upper;
-		pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
-				    c->err_info, (dma_addr_t) temp64.val);
-		pci_free_consistent(h->pdev, sizeof(CommandList_struct),
-				    c, (dma_addr_t) c->busaddr);
-	} else {
-		i = c - h->cmd_pool;
-		clear_bit(i & (BITS_PER_LONG - 1),
-			  h->cmd_pool_bits + (i / BITS_PER_LONG));
-		h->nr_frees++;
-	}
+	temp64.val32.lower = c->ErrDesc.Addr.lower;
+	temp64.val32.upper = c->ErrDesc.Addr.upper;
+	pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
+			    c->err_info, (dma_addr_t) temp64.val);
+	pci_free_consistent(h->pdev, sizeof(CommandList_struct),
+			    c, (dma_addr_t) c->busaddr);
 }
 
 static inline ctlr_info_t *get_host(struct gendisk *disk)
@@ -1470,7 +1482,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			} else {
 				memset(buff, 0, iocommand.buf_size);
 			}
-			c = cmd_alloc(h, 0);
+			c = cmd_special_alloc(h);
 			if (!c) {
 				kfree(buff);
 				return -ENOMEM;
@@ -1524,7 +1536,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			if (copy_to_user
 			    (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
 				kfree(buff);
-				cmd_free(h, c, 0);
+				cmd_special_free(h, c);
 				return -EFAULT;
 			}
 
@@ -1533,12 +1545,12 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				if (copy_to_user
 				    (iocommand.buf, buff, iocommand.buf_size)) {
 					kfree(buff);
-					cmd_free(h, c, 0);
+					cmd_special_free(h, c);
 					return -EFAULT;
 				}
 			}
 			kfree(buff);
-			cmd_free(h, c, 0);
+			cmd_special_free(h, c);
 			return 0;
 		}
 	case CCISS_BIG_PASSTHRU:{
@@ -1620,7 +1632,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				data_ptr += sz;
 				sg_used++;
 			}
-			c = cmd_alloc(h, 0);
+			c = cmd_special_alloc(h);
 			if (!c) {
 				status = -ENOMEM;
 				goto cleanup1;
@@ -1668,7 +1680,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			/* Copy the error information out */
 			ioc->error_info = *(c->err_info);
 			if (copy_to_user(argp, ioc, sizeof(*ioc))) {
-				cmd_free(h, c, 0);
+				cmd_special_free(h, c);
 				status = -EFAULT;
 				goto cleanup1;
 			}
@@ -1678,14 +1690,14 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 				for (i = 0; i < sg_used; i++) {
 					if (copy_to_user
 					    (ptr, buff[i], buff_size[i])) {
-						cmd_free(h, c, 0);
+						cmd_special_free(h, c);
 						status = -EFAULT;
 						goto cleanup1;
 					}
 					ptr += buff_size[i];
 				}
 			}
-			cmd_free(h, c, 0);
+			cmd_special_free(h, c);
 			status = 0;
 		      cleanup1:
 			if (buff) {
@@ -1813,7 +1825,7 @@ static void cciss_softirq_done(struct request *rq)
 	blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
 
 	spin_lock_irqsave(&h->lock, flags);
-	cmd_free(h, c, 1);
+	cmd_free(h, c);
 	cciss_check_queues(h);
 	spin_unlock_irqrestore(&h->lock, flags);
 }
@@ -2765,7 +2777,7 @@ static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
 	CommandList_struct *c;
 	int return_status;
 
-	c = cmd_alloc(h, 0);
+	c = cmd_special_alloc(h);
 	if (!c)
 		return -ENOMEM;
 	return_status = fill_cmd(h, c, cmd, buff, size, page_code,
@@ -2773,7 +2785,7 @@ static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
 	if (return_status == IO_OK)
 		return_status = sendcmd_withirq_core(h, c, 1);
 
-	cmd_free(h, c, 0);
+	cmd_special_free(h, c);
 	return return_status;
 }
 
@@ -3240,7 +3252,8 @@ static void do_cciss_request(struct request_queue *q)
 
 	BUG_ON(creq->nr_phys_segments > h->maxsgentries);
 
-	if ((c = cmd_alloc(h, 1)) == NULL)
+	c = cmd_alloc(h);
+	if (!c)
 		goto full;
 
 	blk_start_request(creq);
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 9133ad4c7b1b..9fe0d8ffc90d 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -49,8 +49,10 @@ static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
 	__u8 page_code, unsigned char *scsi3addr,
 	int cmd_type);
 
-static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool);
-static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool);
+static CommandList_struct *cmd_alloc(ctlr_info_t *h);
+static CommandList_struct *cmd_special_alloc(ctlr_info_t *h);
+static void cmd_free(ctlr_info_t *h, CommandList_struct *c);
+static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c);
 
 static int cciss_scsi_proc_info(
 		struct Scsi_Host *sh,
@@ -1582,7 +1584,7 @@ static int wait_for_device_to_become_ready(ctlr_info_t *h,
 	int waittime = HZ;
 	CommandList_struct *c;
 
-	c = cmd_alloc(h, 1);
+	c = cmd_alloc(h);
 	if (!c) {
 		printk(KERN_WARNING "cciss%d: out of memory in "
 			"wait_for_device_to_become_ready.\n", h->ctlr);
@@ -1640,7 +1642,7 @@ retry_tur:
 	else
 		printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
 
-	cmd_free(h, c, 1);
+	cmd_free(h, c);
 	return rc;
 }
 
-- 
cgit v1.2.3


From b2a4a43dbaf10383703d512bbe560d5a24da0bf2 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:48 -0500
Subject: cciss: change printks to dev_warn, etc.

cciss: change printks to dev_warn, etc.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c      | 314 ++++++++++++++++++++-------------------------
 drivers/block/cciss_scsi.c | 159 +++++++++++------------
 2 files changed, 212 insertions(+), 261 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 1dc95740b3bb..35a9f08cf74f 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -922,9 +922,6 @@ static CommandList_struct *cmd_alloc(ctlr_info_t *h)
 			return NULL;
 	} while (test_and_set_bit(i & (BITS_PER_LONG - 1),
 		  h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
-#endif
 	c = h->cmd_pool + i;
 	memset(c, 0, sizeof(CommandList_struct));
 	cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct);
@@ -1026,10 +1023,7 @@ static int cciss_open(struct block_device *bdev, fmode_t mode)
 	ctlr_info_t *h = get_host(bdev->bd_disk);
 	drive_info_struct *drv = get_drv(bdev->bd_disk);
 
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
-#endif				/* CCISS_DEBUG */
-
+	dev_dbg(&h->pdev->dev, "cciss_open %s\n", bdev->bd_disk->disk_name);
 	if (drv->busy_configuring)
 		return -EBUSY;
 	/*
@@ -1081,11 +1075,7 @@ static int cciss_release(struct gendisk *disk, fmode_t mode)
 	lock_kernel();
 	h = get_host(disk);
 	drv = get_drv(disk);
-
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
-#endif				/* CCISS_DEBUG */
-
+	dev_dbg(&h->pdev->dev, "cciss_release %s\n", disk->disk_name);
 	drv->usage_count--;
 	h->usage_count--;
 	unlock_kernel();
@@ -1251,10 +1241,8 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 	drive_info_struct *drv = get_drv(disk);
 	void __user *argp = (void __user *)arg;
 
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
-#endif				/* CCISS_DEBUG */
-
+	dev_dbg(&h->pdev->dev, "cciss_ioctl: Called with cmd=%x %lx\n",
+		cmd, arg);
 	switch (cmd) {
 	case CCISS_GETPCIINFO:
 		{
@@ -1299,10 +1287,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
 			    (&intinfo, argp, sizeof(cciss_coalint_struct)))
 				return -EFAULT;
 			if ((intinfo.delay == 0) && (intinfo.count == 0))
-			{
-//                      printk("cciss_ioctl: delay and count cannot be 0\n");
 				return -EINVAL;
-			}
 			spin_lock_irqsave(&h->lock, flags);
 			/* Update the field, and then ring the doorbell */
 			writel(intinfo.delay,
@@ -1814,9 +1799,7 @@ static void cciss_softirq_done(struct request *rq)
 		++sg_index;
 	}
 
-#ifdef CCISS_DEBUG
-	printk("Done with %p\n", rq);
-#endif				/* CCISS_DEBUG */
+	dev_dbg(&h->pdev->dev, "Done with %p\n", rq);
 
 	/* set the residual count for pc requests */
 	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
@@ -2029,7 +2012,7 @@ static void cciss_update_drive_info(ctlr_info_t *h, int drv_index,
 	 * (unless it's the first disk (for the controller node).
 	 */
 	if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
-		printk(KERN_WARNING "disk %d has changed.\n", drv_index);
+		dev_warn(&h->pdev->dev, "disk %d has changed.\n", drv_index);
 		spin_lock_irqsave(&h->lock, flags);
 		h->drv[drv_index]->busy_configuring = 1;
 		spin_unlock_irqrestore(&h->lock, flags);
@@ -2082,8 +2065,8 @@ static void cciss_update_drive_info(ctlr_info_t *h, int drv_index,
 		if (cciss_add_disk(h, disk, drv_index) != 0) {
 			cciss_free_gendisk(h, drv_index);
 			cciss_free_drive_info(h, drv_index);
-			printk(KERN_WARNING "cciss:%d could not update "
-				"disk %d\n", h->ctlr, drv_index);
+			dev_warn(&h->pdev->dev, "could not update disk %d\n",
+				drv_index);
 			--h->num_luns;
 		}
 	}
@@ -2093,7 +2076,7 @@ freeret:
 	kfree(drvinfo);
 	return;
 mem_msg:
-	printk(KERN_ERR "cciss: out of memory\n");
+	dev_err(&h->pdev->dev, "out of memory\n");
 	goto freeret;
 }
 
@@ -2185,9 +2168,9 @@ static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
 		h->gendisk[drv_index] =
 			alloc_disk(1 << NWD_SHIFT);
 		if (!h->gendisk[drv_index]) {
-			printk(KERN_ERR "cciss%d: could not "
-				"allocate a new disk %d\n",
-				h->ctlr, drv_index);
+			dev_err(&h->pdev->dev,
+				"could not allocate a new disk %d\n",
+				drv_index);
 			goto err_free_drive_info;
 		}
 	}
@@ -2238,8 +2221,7 @@ static void cciss_add_controller_node(ctlr_info_t *h)
 	cciss_free_gendisk(h, drv_index);
 	cciss_free_drive_info(h, drv_index);
 error:
-	printk(KERN_WARNING "cciss%d: could not "
-		"add disk 0.\n", h->ctlr);
+	dev_warn(&h->pdev->dev, "could not add disk 0.\n");
 	return;
 }
 
@@ -2287,8 +2269,8 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
 	if (return_code == IO_OK)
 		listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
 	else {	/* reading number of logical volumes failed */
-		printk(KERN_WARNING "cciss: report logical volume"
-		       " command failed\n");
+		dev_warn(&h->pdev->dev,
+			"report logical volume command failed\n");
 		listlength = 0;
 		goto freeret;
 	}
@@ -2296,7 +2278,7 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
 	num_luns = listlength / 8;	/* 8 bytes per entry */
 	if (num_luns > CISS_MAX_LUN) {
 		num_luns = CISS_MAX_LUN;
-		printk(KERN_WARNING "cciss: more luns configured"
+		dev_warn(&h->pdev->dev, "more luns configured"
 		       " on controller than can be handled by"
 		       " this driver.\n");
 	}
@@ -2380,7 +2362,7 @@ freeret:
 	 */
 	return -1;
 mem_msg:
-	printk(KERN_ERR "cciss: out of memory\n");
+	dev_err(&h->pdev->dev, "out of memory\n");
 	h->busy_configuring = 0;
 	goto freeret;
 }
@@ -2587,9 +2569,7 @@ static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
 			c->Request.Timeout = 0;
 			break;
 		default:
-			printk(KERN_WARNING
-			       "cciss%d:  Unknown Command 0x%c\n",
-				h->ctlr, cmd);
+			dev_warn(&h->pdev->dev, "Unknown Command 0x%c\n", cmd);
 			return IO_ERROR;
 		}
 	} else if (cmd_type == TYPE_MSG) {
@@ -2621,14 +2601,12 @@ static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
 			c->Request.CDB[0] = cmd;
 			break;
 		default:
-			printk(KERN_WARNING
-			       "cciss%d: unknown message type %d\n",
-				h->ctlr, cmd);
+			dev_warn(&h->pdev->dev,
+				"unknown message type %d\n", cmd);
 			return IO_ERROR;
 		}
 	} else {
-		printk(KERN_WARNING
-		       "cciss%d: unknown command type %d\n", h->ctlr, cmd_type);
+		dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
 		return IO_ERROR;
 	}
 	/* Fill in the scatter gather information */
@@ -2656,15 +2634,14 @@ static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
 		default:
 			if (check_for_unit_attention(h, c))
 				return IO_NEEDS_RETRY;
-			printk(KERN_WARNING "cciss%d: cmd 0x%02x "
+			dev_warn(&h->pdev->dev, "cmd 0x%02x "
 				"check condition, sense key = 0x%02x\n",
-				h->ctlr, c->Request.CDB[0],
-				c->err_info->SenseInfo[2]);
+				c->Request.CDB[0], c->err_info->SenseInfo[2]);
 		}
 		break;
 	default:
-		printk(KERN_WARNING "cciss%d: cmd 0x%02x"
-			"scsi status = 0x%02x\n", h->ctlr,
+		dev_warn(&h->pdev->dev, "cmd 0x%02x"
+			"scsi status = 0x%02x\n",
 			c->Request.CDB[0], c->err_info->ScsiStatus);
 		break;
 	}
@@ -2687,43 +2664,42 @@ static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
 		/* expected for inquiry and report lun commands */
 		break;
 	case CMD_INVALID:
-		printk(KERN_WARNING "cciss: cmd 0x%02x is "
+		dev_warn(&h->pdev->dev, "cmd 0x%02x is "
 		       "reported invalid\n", c->Request.CDB[0]);
 		return_status = IO_ERROR;
 		break;
 	case CMD_PROTOCOL_ERR:
-		printk(KERN_WARNING "cciss: cmd 0x%02x has "
-		       "protocol error \n", c->Request.CDB[0]);
+		dev_warn(&h->pdev->dev, "cmd 0x%02x has "
+		       "protocol error\n", c->Request.CDB[0]);
 		return_status = IO_ERROR;
 		break;
 	case CMD_HARDWARE_ERR:
-		printk(KERN_WARNING "cciss: cmd 0x%02x had "
+		dev_warn(&h->pdev->dev, "cmd 0x%02x had "
 		       " hardware error\n", c->Request.CDB[0]);
 		return_status = IO_ERROR;
 		break;
 	case CMD_CONNECTION_LOST:
-		printk(KERN_WARNING "cciss: cmd 0x%02x had "
+		dev_warn(&h->pdev->dev, "cmd 0x%02x had "
 		       "connection lost\n", c->Request.CDB[0]);
 		return_status = IO_ERROR;
 		break;
 	case CMD_ABORTED:
-		printk(KERN_WARNING "cciss: cmd 0x%02x was "
+		dev_warn(&h->pdev->dev, "cmd 0x%02x was "
 		       "aborted\n", c->Request.CDB[0]);
 		return_status = IO_ERROR;
 		break;
 	case CMD_ABORT_FAILED:
-		printk(KERN_WARNING "cciss: cmd 0x%02x reports "
+		dev_warn(&h->pdev->dev, "cmd 0x%02x reports "
 		       "abort failed\n", c->Request.CDB[0]);
 		return_status = IO_ERROR;
 		break;
 	case CMD_UNSOLICITED_ABORT:
-		printk(KERN_WARNING
-		       "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
+		dev_warn(&h->pdev->dev, "unsolicited abort 0x%02x\n",
 			c->Request.CDB[0]);
 		return_status = IO_NEEDS_RETRY;
 		break;
 	default:
-		printk(KERN_WARNING "cciss: cmd 0x%02x returned "
+		dev_warn(&h->pdev->dev, "cmd 0x%02x returned "
 		       "unknown status %x\n", c->Request.CDB[0],
 		       c->err_info->CommandStatus);
 		return_status = IO_ERROR;
@@ -2751,7 +2727,7 @@ resend_cmd2:
 
 	if (return_status == IO_NEEDS_RETRY &&
 		c->retry_count < MAX_CMD_RETRIES) {
-		printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
+		dev_warn(&h->pdev->dev, "retrying 0x%02x\n",
 			c->Request.CDB[0]);
 		c->retry_count++;
 		/* erase the old error information */
@@ -2805,8 +2781,8 @@ static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
 			sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
 	if (return_code == IO_OK) {
 		if (inq_buff->data_byte[8] == 0xFF) {
-			printk(KERN_WARNING
-			       "cciss: reading geometry failed, volume "
+			dev_warn(&h->pdev->dev,
+			       "reading geometry failed, volume "
 			       "does not support reading geometry\n");
 			drv->heads = 255;
 			drv->sectors = 32;	/* Sectors per track */
@@ -2830,7 +2806,7 @@ static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
 			drv->cylinders = real_size;
 		}
 	} else {		/* Get geometry failed */
-		printk(KERN_WARNING "cciss: reading geometry failed\n");
+		dev_warn(&h->pdev->dev, "reading geometry failed\n");
 	}
 }
 
@@ -2844,7 +2820,7 @@ cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size,
 
 	buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
 	if (!buf) {
-		printk(KERN_WARNING "cciss: out of memory\n");
+		dev_warn(&h->pdev->dev, "out of memory\n");
 		return;
 	}
 
@@ -2855,7 +2831,7 @@ cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size,
 		*total_size = be32_to_cpu(*(__be32 *) buf->total_size);
 		*block_size = be32_to_cpu(*(__be32 *) buf->block_size);
 	} else {		/* read capacity command failed */
-		printk(KERN_WARNING "cciss: read capacity failed\n");
+		dev_warn(&h->pdev->dev, "read capacity failed\n");
 		*total_size = 0;
 		*block_size = BLOCK_SIZE;
 	}
@@ -2871,7 +2847,7 @@ static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
 
 	buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
 	if (!buf) {
-		printk(KERN_WARNING "cciss: out of memory\n");
+		dev_warn(&h->pdev->dev, "out of memory\n");
 		return;
 	}
 
@@ -2883,11 +2859,11 @@ static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
 		*total_size = be64_to_cpu(*(__be64 *) buf->total_size);
 		*block_size = be32_to_cpu(*(__be32 *) buf->block_size);
 	} else {		/* read capacity command failed */
-		printk(KERN_WARNING "cciss: read capacity failed\n");
+		dev_warn(&h->pdev->dev, "read capacity failed\n");
 		*total_size = 0;
 		*block_size = BLOCK_SIZE;
 	}
-	printk(KERN_INFO "      blocks= %llu block_size= %d\n",
+	dev_info(&h->pdev->dev, "      blocks= %llu block_size= %d\n",
 	       (unsigned long long)*total_size+1, *block_size);
 	kfree(buf);
 }
@@ -2915,7 +2891,7 @@ static int cciss_revalidate(struct gendisk *disk)
 
 	inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
 	if (inq_buff == NULL) {
-		printk(KERN_WARNING "cciss: out of memory\n");
+		dev_warn(&h->pdev->dev, "out of memory\n");
 		return 1;
 	}
 	if (h->cciss_read == CCISS_READ_10) {
@@ -2959,7 +2935,7 @@ static void start_io(ctlr_info_t *h)
 		c = hlist_entry(h->reqQ.first, CommandList_struct, list);
 		/* can't do anything if fifo is full */
 		if ((h->access.fifo_full(h))) {
-			printk(KERN_WARNING "cciss: fifo full\n");
+			dev_warn(&h->pdev->dev, "fifo full\n");
 			break;
 		}
 
@@ -3026,7 +3002,7 @@ static inline int evaluate_target_status(ctlr_info_t *h,
 
 	if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
 		if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
-			printk(KERN_WARNING "cciss: cmd %p "
+			dev_warn(&h->pdev->dev, "cmd %p "
 			       "has SCSI Status 0x%x\n",
 			       cmd, cmd->err_info->ScsiStatus);
 		return error_value;
@@ -3047,7 +3023,7 @@ static inline int evaluate_target_status(ctlr_info_t *h,
 	/* Not SG_IO or similar? */
 	if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 		if (error_value != 0)
-			printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
+			dev_warn(&h->pdev->dev, "cmd %p has CHECK CONDITION"
 			       " sense key = 0x%x\n", cmd, sense_key);
 		return error_value;
 	}
@@ -3088,7 +3064,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 		break;
 	case CMD_DATA_UNDERRUN:
 		if (cmd->rq->cmd_type == REQ_TYPE_FS) {
-			printk(KERN_WARNING "cciss: cmd %p has"
+			dev_warn(&h->pdev->dev, "cmd %p has"
 			       " completed with data underrun "
 			       "reported\n", cmd);
 			cmd->rq->resid_len = cmd->err_info->ResidualCnt;
@@ -3096,12 +3072,12 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 		break;
 	case CMD_DATA_OVERRUN:
 		if (cmd->rq->cmd_type == REQ_TYPE_FS)
-			printk(KERN_WARNING "cciss: cmd %p has"
+			dev_warn(&h->pdev->dev, "cciss: cmd %p has"
 			       " completed with data overrun "
 			       "reported\n", cmd);
 		break;
 	case CMD_INVALID:
-		printk(KERN_WARNING "cciss: cmd %p is "
+		dev_warn(&h->pdev->dev, "cciss: cmd %p is "
 		       "reported invalid\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
@@ -3109,15 +3085,15 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_PROTOCOL_ERR:
-		printk(KERN_WARNING "cciss: cmd %p has "
-		       "protocol error \n", cmd);
+		dev_warn(&h->pdev->dev, "cciss: cmd %p has "
+		       "protocol error\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
 			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_HARDWARE_ERR:
-		printk(KERN_WARNING "cciss: cmd %p had "
+		dev_warn(&h->pdev->dev, "cciss: cmd %p had "
 		       " hardware error\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
@@ -3125,7 +3101,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_CONNECTION_LOST:
-		printk(KERN_WARNING "cciss: cmd %p had "
+		dev_warn(&h->pdev->dev, "cciss: cmd %p had "
 		       "connection lost\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
@@ -3133,7 +3109,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_ABORTED:
-		printk(KERN_WARNING "cciss: cmd %p was "
+		dev_warn(&h->pdev->dev, "cciss: cmd %p was "
 		       "aborted\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
@@ -3141,7 +3117,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 				DID_PASSTHROUGH : DID_ABORT);
 		break;
 	case CMD_ABORT_FAILED:
-		printk(KERN_WARNING "cciss: cmd %p reports "
+		dev_warn(&h->pdev->dev, "cciss: cmd %p reports "
 		       "abort failed\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
@@ -3149,31 +3125,29 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
 				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	case CMD_UNSOLICITED_ABORT:
-		printk(KERN_WARNING "cciss%d: unsolicited "
+		dev_warn(&h->pdev->dev, "cciss%d: unsolicited "
 		       "abort %p\n", h->ctlr, cmd);
 		if (cmd->retry_count < MAX_CMD_RETRIES) {
 			retry_cmd = 1;
-			printk(KERN_WARNING
-			       "cciss%d: retrying %p\n", h->ctlr, cmd);
+			dev_warn(&h->pdev->dev, "retrying %p\n", cmd);
 			cmd->retry_count++;
 		} else
-			printk(KERN_WARNING
-			       "cciss%d: %p retried too "
-			       "many times\n", h->ctlr, cmd);
+			dev_warn(&h->pdev->dev,
+				"%p retried too many times\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
 			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 				DID_PASSTHROUGH : DID_ABORT);
 		break;
 	case CMD_TIMEOUT:
-		printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
+		dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
 			cmd->err_info->CommandStatus, DRIVER_OK,
 			(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
 				DID_PASSTHROUGH : DID_ERROR);
 		break;
 	default:
-		printk(KERN_WARNING "cciss: cmd %p returned "
+		dev_warn(&h->pdev->dev, "cmd %p returned "
 		       "unknown status %x\n", cmd,
 		       cmd->err_info->CommandStatus);
 		rq->errors = make_status_bytes(SAM_STAT_GOOD,
@@ -3282,11 +3256,8 @@ static void do_cciss_request(struct request_queue *q)
 	c->Request.CDB[0] =
 	    (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
 	start_blk = blk_rq_pos(creq);
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
+	dev_dbg(&h->pdev->dev, "sector =%d nr_sectors=%d\n",
 	       (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
-#endif				/* CCISS_DEBUG */
-
 	sg_init_table(tmp_sg, h->maxsgentries);
 	seg = blk_rq_map_sg(q, creq, tmp_sg);
 
@@ -3326,11 +3297,9 @@ static void do_cciss_request(struct request_queue *q)
 	if (seg > h->maxSG)
 		h->maxSG = seg;
 
-#ifdef CCISS_DEBUG
-	printk(KERN_DEBUG "cciss: Submitting %ld sectors in %d segments "
+	dev_dbg(&h->pdev->dev, "Submitting %u sectors in %d segments "
 			"chained[%d]\n",
 			blk_rq_sectors(creq), seg, chained);
-#endif				/* CCISS_DEBUG */
 
 	c->Header.SGTotal = seg + chained;
 	if (seg <= h->max_cmd_sgentries)
@@ -3373,7 +3342,8 @@ static void do_cciss_request(struct request_queue *q)
 		c->Request.CDBLen = creq->cmd_len;
 		memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
 	} else {
-		printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
+		dev_warn(&h->pdev->dev, "bad request type %d\n",
+			creq->cmd_type);
 		BUG();
 	}
 
@@ -3675,18 +3645,17 @@ static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
 
 	switch (c->err_info->SenseInfo[12]) {
 	case STATE_CHANGED:
-		printk(KERN_WARNING "cciss%d: a state change "
-			"detected, command retried\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "a state change "
+			"detected, command retried\n");
 		return 1;
 	break;
 	case LUN_FAILED:
-		printk(KERN_WARNING "cciss%d: LUN failure "
-			"detected, action required\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "LUN failure "
+			"detected, action required\n");
 		return 1;
 	break;
 	case REPORT_LUNS_CHANGED:
-		printk(KERN_WARNING "cciss%d: report LUN data "
-			"changed\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "report LUN data changed\n");
 	/*
 	 * Here, we could call add_to_scan_list and wake up the scan thread,
 	 * except that it's quite likely that we will get more than one
@@ -3706,19 +3675,18 @@ static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
 		return 1;
 	break;
 	case POWER_OR_RESET:
-		printk(KERN_WARNING "cciss%d: a power on "
-			"or device reset detected\n", h->ctlr);
+		dev_warn(&h->pdev->dev,
+			"a power on or device reset detected\n");
 		return 1;
 	break;
 	case UNIT_ATTENTION_CLEARED:
-		printk(KERN_WARNING "cciss%d: unit attention "
-		    "cleared by another initiator\n", h->ctlr);
+		dev_warn(&h->pdev->dev,
+			"unit attention cleared by another initiator\n");
 		return 1;
 	break;
 	default:
-		printk(KERN_WARNING "cciss%d: unknown "
-			"unit attention detected\n", h->ctlr);
-				return 1;
+		dev_warn(&h->pdev->dev, "unknown unit attention detected\n");
+		return 1;
 	}
 }
 
@@ -3727,38 +3695,40 @@ static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
  *   the io functions.
  *   This is for debug only.
  */
-static void print_cfg_table(CfgTable_struct *tb)
+static void print_cfg_table(ctlr_info_t *h)
 {
-#ifdef CCISS_DEBUG
 	int i;
 	char temp_name[17];
+	CfgTable_struct *tb = h->cfgtable;
 
-	printk("Controller Configuration information\n");
-	printk("------------------------------------\n");
+	dev_dbg(&h->pdev->dev, "Controller Configuration information\n");
+	dev_dbg(&h->pdev->dev, "------------------------------------\n");
 	for (i = 0; i < 4; i++)
 		temp_name[i] = readb(&(tb->Signature[i]));
 	temp_name[4] = '\0';
-	printk("   Signature = %s\n", temp_name);
-	printk("   Spec Number = %d\n", readl(&(tb->SpecValence)));
-	printk("   Transport methods supported = 0x%x\n",
+	dev_dbg(&h->pdev->dev, "   Signature = %s\n", temp_name);
+	dev_dbg(&h->pdev->dev, "   Spec Number = %d\n",
+		readl(&(tb->SpecValence)));
+	dev_dbg(&h->pdev->dev, "   Transport methods supported = 0x%x\n",
 	       readl(&(tb->TransportSupport)));
-	printk("   Transport methods active = 0x%x\n",
+	dev_dbg(&h->pdev->dev, "   Transport methods active = 0x%x\n",
 	       readl(&(tb->TransportActive)));
-	printk("   Requested transport Method = 0x%x\n",
+	dev_dbg(&h->pdev->dev, "   Requested transport Method = 0x%x\n",
 	       readl(&(tb->HostWrite.TransportRequest)));
-	printk("   Coalesce Interrupt Delay = 0x%x\n",
+	dev_dbg(&h->pdev->dev, "   Coalesce Interrupt Delay = 0x%x\n",
 	       readl(&(tb->HostWrite.CoalIntDelay)));
-	printk("   Coalesce Interrupt Count = 0x%x\n",
+	dev_dbg(&h->pdev->dev, "   Coalesce Interrupt Count = 0x%x\n",
 	       readl(&(tb->HostWrite.CoalIntCount)));
-	printk("   Max outstanding commands = 0x%d\n",
+	dev_dbg(&h->pdev->dev, "   Max outstanding commands = 0x%d\n",
 	       readl(&(tb->CmdsOutMax)));
-	printk("   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
+	dev_dbg(&h->pdev->dev, "   Bus Types = 0x%x\n",
+		readl(&(tb->BusTypes)));
 	for (i = 0; i < 16; i++)
 		temp_name[i] = readb(&(tb->ServerName[i]));
 	temp_name[16] = '\0';
-	printk("   Server Name = %s\n", temp_name);
-	printk("   Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
-#endif				/* CCISS_DEBUG */
+	dev_dbg(&h->pdev->dev, "   Server Name = %s\n", temp_name);
+	dev_dbg(&h->pdev->dev, "   Heartbeat Counter = 0x%x\n\n\n",
+		readl(&(tb->HeartBeat)));
 }
 
 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
@@ -3783,7 +3753,7 @@ static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
 				offset += 8;
 				break;
 			default:	/* reserved in PCI 2.2 */
-				printk(KERN_WARNING
+				dev_warn(&pdev->dev,
 				       "Base address is invalid\n");
 				return -1;
 				break;
@@ -3908,7 +3878,7 @@ static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
 	cciss_wait_for_mode_change_ack(h);
 	register_value = readl(&(h->cfgtable->TransportActive));
 	if (!(register_value & CFGTBL_Trans_Performant))
-		printk(KERN_WARNING "cciss: unable to get board into"
+		dev_warn(&h->pdev->dev, "cciss: unable to get board into"
 					" performant mode\n");
 }
 
@@ -3923,14 +3893,13 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
 	if (!(trans_support & PERFORMANT_MODE))
 		return;
 
-	printk(KERN_WARNING "cciss%d: Placing controller into "
-				"performant mode\n", h->ctlr);
+	dev_dbg(&h->pdev->dev, "Placing controller into performant mode\n");
 	/* Performant mode demands commands on a 32 byte boundary
 	 * pci_alloc_consistent aligns on page boundarys already.
 	 * Just need to check if divisible by 32
 	 */
 	if ((sizeof(CommandList_struct) % 32) != 0) {
-		printk(KERN_WARNING "%s %d %s\n",
+		dev_warn(&h->pdev->dev, "%s %d %s\n",
 			"cciss info: command size[",
 			(int)sizeof(CommandList_struct),
 			"] not divisible by 32, no performant mode..\n");
@@ -3995,12 +3964,12 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *h)
 			return;
 		}
 		if (err > 0) {
-			printk(KERN_WARNING "cciss: only %d MSI-X vectors "
-			       "available\n", err);
+			dev_warn(&h->pdev->dev,
+				"only %d MSI-X vectors available\n", err);
 			goto default_int_mode;
 		} else {
-			printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
-			       err);
+			dev_warn(&h->pdev->dev,
+				"MSI-X init failed %d\n", err);
 			goto default_int_mode;
 		}
 	}
@@ -4008,7 +3977,7 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *h)
 		if (!pci_enable_msi(h->pdev))
 			h->msi_vector = 1;
 		else
-			printk(KERN_WARNING "cciss: MSI init failed\n");
+			dev_warn(&h->pdev->dev, "MSI init failed\n");
 	}
 default_int_mode:
 #endif				/* CONFIG_PCI_MSI */
@@ -4210,28 +4179,24 @@ static int __devinit cciss_pci_init(ctlr_info_t *h)
 	h->access = *(products[prod_index].access);
 
 	if (cciss_board_disabled(h)) {
-		printk(KERN_WARNING
-		       "cciss: controller appears to be disabled\n");
+		dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
 		return -ENODEV;
 	}
 	err = pci_enable_device(h->pdev);
 	if (err) {
-		printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
+		dev_warn(&h->pdev->dev, "Unable to Enable PCI device\n");
 		return err;
 	}
 
 	err = pci_request_regions(h->pdev, "cciss");
 	if (err) {
-		printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
-		       "aborting\n");
+		dev_warn(&h->pdev->dev,
+			"Cannot obtain PCI resources, aborting\n");
 		return err;
 	}
 
-#ifdef CCISS_DEBUG
-	printk(KERN_INFO "command = %x\n", command);
-	printk(KERN_INFO "irq = %x\n", h->pdev->irq);
-	printk(KERN_INFO "board_id = %x\n", h->board_id);
-#endif				/* CCISS_DEBUG */
+	dev_dbg(&h->pdev->dev, "irq = %x\n", h->pdev->irq);
+	dev_dbg(&h->pdev->dev, "board_id = %x\n", h->board_id);
 
 /* If the kernel supports MSI/MSI-X we will try to enable that functionality,
  * else we use the IO-APIC interrupt assigned to us by system ROM.
@@ -4251,7 +4216,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *h)
 	err = cciss_find_cfgtables(h);
 	if (err)
 		goto err_out_free_res;
-	print_cfg_table(h->cfgtable);
+	print_cfg_table(h);
 	cciss_find_board_params(h);
 
 	if (!CISS_signature_present(h)) {
@@ -4281,7 +4246,7 @@ err_out_free_res:
 /* Function to find the first free pointer into our hba[] array
  * Returns -1 if no free entries are left.
  */
-static int alloc_cciss_hba(void)
+static int alloc_cciss_hba(struct pci_dev *pdev)
 {
 	int i;
 
@@ -4296,11 +4261,11 @@ static int alloc_cciss_hba(void)
 			return i;
 		}
 	}
-	printk(KERN_WARNING "cciss: This driver supports a maximum"
+	dev_warn(&pdev->dev, "This driver supports a maximum"
 	       " of %d controllers.\n", MAX_CTLR);
 	return -1;
 Enomem:
-	printk(KERN_ERR "cciss: out of memory.\n");
+	dev_warn(&pdev->dev, "out of memory.\n");
 	return -1;
 }
 
@@ -4388,7 +4353,8 @@ static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, u
 	/* we leak the DMA buffer here ... no choice since the controller could
 	   still complete the command. */
 	if (i == 10) {
-		printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
+		dev_err(&pdev->dev,
+			"controller message %02x:%02x timed out\n",
 			opcode, type);
 		return -ETIMEDOUT;
 	}
@@ -4396,12 +4362,12 @@ static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, u
 	pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
 
 	if (tag & 2) {
-		printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
+		dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
 			opcode, type);
 		return -EIO;
 	}
 
-	printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
+	dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
 		opcode, type);
 	return 0;
 }
@@ -4422,7 +4388,7 @@ static __devinit int cciss_reset_msi(struct pci_dev *pdev)
 	if (pos) {
 		pci_read_config_word(pdev, msi_control_reg(pos), &control);
 		if (control & PCI_MSI_FLAGS_ENABLE) {
-			printk(KERN_INFO "cciss: resetting MSI\n");
+			dev_info(&pdev->dev, "resetting MSI\n");
 			pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
 		}
 	}
@@ -4431,7 +4397,7 @@ static __devinit int cciss_reset_msi(struct pci_dev *pdev)
 	if (pos) {
 		pci_read_config_word(pdev, msi_control_reg(pos), &control);
 		if (control & PCI_MSIX_FLAGS_ENABLE) {
-			printk(KERN_INFO "cciss: resetting MSI-X\n");
+			dev_info(&pdev->dev, "resetting MSI-X\n");
 			pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
 		}
 	}
@@ -4664,7 +4630,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	rc = cciss_init_reset_devices(pdev);
 	if (rc)
 		return rc;
-	i = alloc_cciss_hba();
+	i = alloc_cciss_hba(pdev);
 	if (i < 0)
 		return -1;
 
@@ -4692,7 +4658,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
 		dac = 0;
 	else {
-		printk(KERN_ERR "cciss: no suitable DMA available\n");
+		dev_err(&h->pdev->dev, "no suitable DMA available\n");
 		goto clean1;
 	}
 
@@ -4705,8 +4671,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 		h->major = COMPAQ_CISS_MAJOR + i;
 	rc = register_blkdev(h->major, h->devname);
 	if (rc == -EBUSY || rc == -EINVAL) {
-		printk(KERN_ERR
-		       "cciss:  Unable to get major number %d for %s "
+		dev_err(&h->pdev->dev,
+		       "Unable to get major number %d for %s "
 		       "on hba %d\n", h->major, h->devname, i);
 		goto clean1;
 	} else {
@@ -4720,20 +4686,20 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 		if (request_irq(h->intr[PERF_MODE_INT],
 				do_cciss_msix_intr,
 				IRQF_DISABLED, h->devname, h)) {
-			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
+			dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n",
 			       h->intr[PERF_MODE_INT], h->devname);
 			goto clean2;
 		}
 	} else {
 		if (request_irq(h->intr[PERF_MODE_INT], do_cciss_intx,
 				IRQF_DISABLED, h->devname, h)) {
-			printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
+			dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n",
 			       h->intr[PERF_MODE_INT], h->devname);
 			goto clean2;
 		}
 	}
 
-	printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
+	dev_info(&h->pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
 	       h->devname, pdev->device, pci_name(pdev),
 	       h->intr[PERF_MODE_INT], dac ? "" : " not");
 
@@ -4751,7 +4717,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	if ((h->cmd_pool_bits == NULL)
 	    || (h->cmd_pool == NULL)
 	    || (h->errinfo_pool == NULL)) {
-		printk(KERN_ERR "cciss: out of memory");
+		dev_err(&h->pdev->dev, "out of memory");
 		goto clean4;
 	}
 
@@ -4764,8 +4730,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 							h->maxsgentries,
 							GFP_KERNEL);
 		if (h->scatter_list[k] == NULL) {
-			printk(KERN_ERR "cciss%d: could not allocate "
-				"s/g lists\n", i);
+			dev_err(&h->pdev->dev,
+				"could not allocate s/g lists\n");
 			goto clean4;
 		}
 	}
@@ -4800,7 +4766,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	/* Get the firmware version */
 	inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
 	if (inq_buff == NULL) {
-		printk(KERN_ERR "cciss: out of memory\n");
+		dev_err(&h->pdev->dev, "out of memory\n");
 		goto clean4;
 	}
 
@@ -4812,7 +4778,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 		h->firm_ver[2] = inq_buff->data_byte[34];
 		h->firm_ver[3] = inq_buff->data_byte[35];
 	} else {	 /* send command failed */
-		printk(KERN_WARNING "cciss: unable to determine firmware"
+		dev_warn(&h->pdev->dev, "unable to determine firmware"
 			" version of controller\n");
 	}
 	kfree(inq_buff);
@@ -4869,9 +4835,7 @@ static void cciss_shutdown(struct pci_dev *pdev)
 	h = pci_get_drvdata(pdev);
 	flush_buf = kzalloc(4, GFP_KERNEL);
 	if (!flush_buf) {
-		printk(KERN_WARNING
-			"cciss:%d cache not flushed, out of memory.\n",
-			h->ctlr);
+		dev_warn(&h->pdev->dev, "cache not flushed, out of memory.\n");
 		return;
 	}
 	/* write all data in the battery backed cache to disk */
@@ -4880,8 +4844,7 @@ static void cciss_shutdown(struct pci_dev *pdev)
 		4, 0, CTLR_LUNID, TYPE_CMD);
 	kfree(flush_buf);
 	if (return_code != IO_OK)
-		printk(KERN_WARNING "cciss%d: Error flushing cache\n",
-			h->ctlr);
+		dev_warn(&h->pdev->dev, "Error flushing cache\n");
 	h->access.set_intr_mask(h, CCISS_INTR_OFF);
 	free_irq(h->intr[PERF_MODE_INT], h);
 }
@@ -4892,15 +4855,14 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
 	int i, j;
 
 	if (pci_get_drvdata(pdev) == NULL) {
-		printk(KERN_ERR "cciss: Unable to remove device \n");
+		dev_err(&pdev->dev, "Unable to remove device\n");
 		return;
 	}
 
 	h = pci_get_drvdata(pdev);
 	i = h->ctlr;
 	if (hba[i] == NULL) {
-		printk(KERN_ERR "cciss: device appears to "
-		       "already be removed\n");
+		dev_err(&pdev->dev, "device appears to already be removed\n");
 		return;
 	}
 
@@ -5021,8 +4983,8 @@ static void __exit cciss_cleanup(void)
 	/* double check that all controller entrys have been removed */
 	for (i = 0; i < MAX_CTLR; i++) {
 		if (hba[i] != NULL) {
-			printk(KERN_WARNING "cciss: had to remove"
-			       " controller %d\n", i);
+			dev_warn(&hba[i]->pdev->dev,
+				"had to remove controller\n");
 			cciss_remove_one(hba[i]->pdev);
 		}
 	}
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 9fe0d8ffc90d..575495f3c4b8 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -192,7 +192,8 @@ scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
 	stk = &sa->cmd_stack; 
 	stk->top++;
 	if (stk->top >= CMD_STACK_SIZE) {
-		printk("cciss: scsi_cmd_free called too many times.\n");
+		dev_err(&h->pdev->dev,
+			"scsi_cmd_free called too many times.\n");
 		BUG();
 	}
 	stk->elem[stk->top] = (struct cciss_scsi_cmd_stack_elem_t *) c;
@@ -245,10 +246,9 @@ scsi_cmd_stack_free(ctlr_info_t *h)
 	sa = h->scsi_ctlr;
 	stk = &sa->cmd_stack; 
 	if (stk->top != CMD_STACK_SIZE-1) {
-		printk( "cciss: %d scsi commands are still outstanding.\n",
+		dev_warn(&h->pdev->dev,
+			"bug: %d scsi commands are still outstanding.\n",
 			CMD_STACK_SIZE - stk->top);
-		// BUG();
-		printk("WE HAVE A BUG HERE!!! stk=0x%p\n", stk);
 	}
 	size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
 
@@ -382,8 +382,8 @@ cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
 	unsigned char addr1[8], addr2[8];
 
 	if (n >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
-		printk("cciss%d: Too many devices, "
-			"some will be inaccessible.\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "Too many devices, "
+			"some will be inaccessible.\n");
 		return -1;
 	}
 
@@ -439,8 +439,8 @@ cciss_scsi_add_entry(ctlr_info_t *h, int hostno,
 	   know our hostno and we don't want to print anything first 
 	   time anyway (the scsi layer's inquiries will show that info) */
 	if (hostno != -1)
-		printk("cciss%d: %s device c%db%dt%dl%d added.\n", 
-			h->ctlr, scsi_device_type(sd->devtype), hostno,
+		dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n",
+			scsi_device_type(sd->devtype), hostno,
 			sd->bus, sd->target, sd->lun);
 	return 0;
 }
@@ -462,8 +462,8 @@ cciss_scsi_remove_entry(ctlr_info_t *h, int hostno, int entry,
 	for (i = entry; i < ccissscsi[h->ctlr].ndevices-1; i++)
 		ccissscsi[h->ctlr].dev[i] = ccissscsi[h->ctlr].dev[i+1];
 	ccissscsi[h->ctlr].ndevices--;
-	printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
-		h->ctlr, scsi_device_type(sd.devtype), hostno,
+	dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n",
+		scsi_device_type(sd.devtype), hostno,
 			sd.bus, sd.target, sd.lun);
 }
 
@@ -536,8 +536,8 @@ adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 			GFP_KERNEL);
 
 	if (!added || !removed) {
-		printk(KERN_WARNING "cciss%d: Out of memory in "
-			"adjust_cciss_scsi_table\n", h->ctlr);
+		dev_warn(&h->pdev->dev,
+			"Out of memory in adjust_cciss_scsi_table\n");
 		goto free_and_out;
 	}
 
@@ -568,17 +568,14 @@ adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 
 		if (found == 0) { /* device no longer present. */ 
 			changes++;
-			/* printk("cciss%d: %s device c%db%dt%dl%d removed.\n",
-				h->ctlr, scsi_device_type(csd->devtype), hostno,
-					csd->bus, csd->target, csd->lun); */
 			cciss_scsi_remove_entry(h, hostno, i,
 				removed, &nremoved);
 			/* remove ^^^, hence i not incremented */
 		} else if (found == 1) { /* device is different in some way */
 			changes++;
-			printk("cciss%d: device c%db%dt%dl%d has changed.\n",
-				h->ctlr, hostno,
-				csd->bus, csd->target, csd->lun);
+			dev_info(&h->pdev->dev,
+				"device c%db%dt%dl%d has changed.\n",
+				hostno, csd->bus, csd->target, csd->lun);
 			cciss_scsi_remove_entry(h, hostno, i,
 				removed, &nremoved);
 			/* remove ^^^, hence i not incremented */
@@ -623,8 +620,8 @@ adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 		} else if (found == 1) {
 			/* should never happen... */
 			changes++;
-			printk(KERN_WARNING "cciss%d: device "
-				"unexpectedly changed\n", h->ctlr);
+			dev_warn(&h->pdev->dev,
+				"device unexpectedly changed\n");
 			/* but if it does happen, we just ignore that device */
 		}
 	}
@@ -648,9 +645,9 @@ adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 			/* We don't expect to get here. */
 			/* future cmds to this device will get selection */
 			/* timeout as if the device was gone. */
-			printk(KERN_WARNING "cciss%d: didn't find "
+			dev_warn(&h->pdev->dev, "didn't find "
 				"c%db%dt%dl%d\n for removal.",
-				h->ctlr, hostno, removed[i].bus,
+				hostno, removed[i].bus,
 				removed[i].target, removed[i].lun);
 		}
 	}
@@ -662,10 +659,9 @@ adjust_cciss_scsi_table(ctlr_info_t *h, int hostno,
 			added[i].target, added[i].lun);
 		if (rc == 0)
 			continue;
-		printk(KERN_WARNING "cciss%d: scsi_add_device "
+		dev_warn(&h->pdev->dev, "scsi_add_device "
 			"c%db%dt%dl%d failed, device not added.\n",
-			h->ctlr, hostno,
-			added[i].bus, added[i].target, added[i].lun);
+			hostno, added[i].bus, added[i].target, added[i].lun);
 		/* now we have to remove it from ccissscsi, */
 		/* since it didn't get added to scsi mid layer */
 		fixup_botched_add(h, added[i].scsi3addr);
@@ -788,7 +784,7 @@ static void complete_scsi_command(CommandList_struct *c, int timeout,
 			case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
 			break;
 			case CMD_DATA_OVERRUN:
-				printk(KERN_WARNING "cciss: %p has"
+				dev_warn(&h->pdev->dev, "%p has"
 					" completed with data overrun "
 					"reported\n", c);
 			break;
@@ -804,43 +800,41 @@ static void complete_scsi_command(CommandList_struct *c, int timeout,
 				}
 			break;
 			case CMD_PROTOCOL_ERR:
-				printk(KERN_WARNING "cciss: %p has "
-					"protocol error\n", c);
+				dev_warn(&h->pdev->dev,
+					"%p has protocol error\n", c);
                         break;
 			case CMD_HARDWARE_ERR:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: %p had "
-					" hardware error\n", c);
+				dev_warn(&h->pdev->dev,
+					"%p had hardware error\n", c);
                         break;
 			case CMD_CONNECTION_LOST:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: %p had "
-					"connection lost\n", c);
+				dev_warn(&h->pdev->dev,
+					"%p had connection lost\n", c);
 			break;
 			case CMD_ABORTED:
 				cmd->result = DID_ABORT << 16;
-				printk(KERN_WARNING "cciss: %p was "
-					"aborted\n", c);
+				dev_warn(&h->pdev->dev, "%p was aborted\n", c);
 			break;
 			case CMD_ABORT_FAILED:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: %p reports "
-					"abort failed\n", c);
+				dev_warn(&h->pdev->dev,
+					"%p reports abort failed\n", c);
 			break;
 			case CMD_UNSOLICITED_ABORT:
 				cmd->result = DID_ABORT << 16;
-				printk(KERN_WARNING "cciss: %p aborted "
-					"do to an unsolicited abort\n", c);
+				dev_warn(&h->pdev->dev, "%p aborted do to an "
+					"unsolicited abort\n", c);
 			break;
 			case CMD_TIMEOUT:
 				cmd->result = DID_TIME_OUT << 16;
-				printk(KERN_WARNING "cciss: %p timedout\n",
-					c);
+				dev_warn(&h->pdev->dev, "%p timedout\n", c);
 			break;
 			default:
 				cmd->result = DID_ERROR << 16;
-				printk(KERN_WARNING "cciss: %p returned "
-					"unknown status %x\n", c,
+				dev_warn(&h->pdev->dev,
+					"%p returned unknown status %x\n", c,
 						ei->CommandStatus); 
 		}
 	}
@@ -956,7 +950,7 @@ cciss_scsi_do_simple_cmd(ctlr_info_t *h,
 }
 
 static void 
-cciss_scsi_interpret_error(CommandList_struct *c)
+cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
 {
 	ErrorInfo_struct *ei;
 
@@ -964,67 +958,64 @@ cciss_scsi_interpret_error(CommandList_struct *c)
 	switch(ei->CommandStatus)
 	{
 		case CMD_TARGET_STATUS:
-			printk(KERN_WARNING "cciss: cmd %p has "
-				"completed with errors\n", c);
-			printk(KERN_WARNING "cciss: cmd %p "
-				"has SCSI Status = %x\n",
-					c, ei->ScsiStatus);
+			dev_warn(&h->pdev->dev,
+				"cmd %p has completed with errors\n", c);
+			dev_warn(&h->pdev->dev,
+				"cmd %p has SCSI Status = %x\n",
+				c, ei->ScsiStatus);
 			if (ei->ScsiStatus == 0)
-				printk(KERN_WARNING 
-				"cciss:SCSI status is abnormally zero.  "
+				dev_warn(&h->pdev->dev,
+				"SCSI status is abnormally zero.  "
 				"(probably indicates selection timeout "
 				"reported incorrectly due to a known "
 				"firmware bug, circa July, 2001.)\n");
 		break;
 		case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
-			printk("UNDERRUN\n");
+			dev_info(&h->pdev->dev, "UNDERRUN\n");
 		break;
 		case CMD_DATA_OVERRUN:
-			printk(KERN_WARNING "cciss: %p has"
+			dev_warn(&h->pdev->dev, "%p has"
 				" completed with data overrun "
 				"reported\n", c);
 		break;
 		case CMD_INVALID: {
 			/* controller unfortunately reports SCSI passthru's */
 			/* to non-existent targets as invalid commands. */
-			printk(KERN_WARNING "cciss: %p is "
-				"reported invalid (probably means "
+			dev_warn(&h->pdev->dev,
+				"%p is reported invalid (probably means "
 				"target device no longer present)\n", c);
 			/* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
 			print_cmd(c);  */
 			}
 		break;
 		case CMD_PROTOCOL_ERR:
-			printk(KERN_WARNING "cciss: %p has "
-				"protocol error\n", c);
+			dev_warn(&h->pdev->dev, "%p has protocol error\n", c);
 		break;
 		case CMD_HARDWARE_ERR:
 			/* cmd->result = DID_ERROR << 16; */
-			printk(KERN_WARNING "cciss: %p had "
-				" hardware error\n", c);
+			dev_warn(&h->pdev->dev, "%p had hardware error\n", c);
 		break;
 		case CMD_CONNECTION_LOST:
-			printk(KERN_WARNING "cciss: %p had "
-				"connection lost\n", c);
+			dev_warn(&h->pdev->dev, "%p had connection lost\n", c);
 		break;
 		case CMD_ABORTED:
-			printk(KERN_WARNING "cciss: %p was "
-				"aborted\n", c);
+			dev_warn(&h->pdev->dev, "%p was aborted\n", c);
 		break;
 		case CMD_ABORT_FAILED:
-			printk(KERN_WARNING "cciss: %p reports "
-				"abort failed\n", c);
+			dev_warn(&h->pdev->dev,
+				"%p reports abort failed\n", c);
 		break;
 		case CMD_UNSOLICITED_ABORT:
-			printk(KERN_WARNING "cciss: %p aborted "
-				"do to an unsolicited abort\n", c);
+			dev_warn(&h->pdev->dev,
+				"%p aborted do to an unsolicited abort\n", c);
 		break;
 		case CMD_TIMEOUT:
-			printk(KERN_WARNING "cciss: %p timedout\n", c);
+			dev_warn(&h->pdev->dev, "%p timedout\n", c);
 		break;
 		default:
-			printk(KERN_WARNING "cciss: %p returned "
-				"unknown status %x\n", c, ei->CommandStatus);
+			dev_warn(&h->pdev->dev,
+				"%p returned unknown status %x\n",
+				c, ei->CommandStatus);
 	}
 }
 
@@ -1063,7 +1054,7 @@ cciss_scsi_do_inquiry(ctlr_info_t *h, unsigned char *scsi3addr,
 
 	if (ei->CommandStatus != 0 && 
 	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
-		cciss_scsi_interpret_error(c);
+		cciss_scsi_interpret_error(h, c);
 		rc = -1;
 	}
 	spin_lock_irqsave(&h->lock, flags);
@@ -1134,7 +1125,7 @@ cciss_scsi_do_report_phys_luns(ctlr_info_t *h,
 	ei = c->err_info;
 	if (ei->CommandStatus != 0 && 
 	    ei->CommandStatus != CMD_DATA_UNDERRUN) {
-		cciss_scsi_interpret_error(c);
+		cciss_scsi_interpret_error(h, c);
 		rc = -1;
 	}
 	spin_lock_irqsave(&h->lock, flags);
@@ -1446,7 +1437,7 @@ cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd
 	c = scsi_cmd_alloc(h);
 	spin_unlock_irqrestore(&h->lock, flags);
 	if (c == NULL) {			/* trouble... */
-		printk("scsi_cmd_alloc returned NULL!\n");
+		dev_warn(&h->pdev->dev, "scsi_cmd_alloc returned NULL!\n");
 		/* FIXME: next 3 lines are -> BAD! <- */
 		cmd->result = DID_NO_CONNECT << 16;
 		done(cmd);
@@ -1502,7 +1493,7 @@ cciss_scsi_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd
 		break;
 
 	  default: 
-		printk("cciss: unknown data direction: %d\n", 
+		dev_warn(&h->pdev->dev, "unknown data direction: %d\n",
 			cmd->sc_data_direction);
 		BUG();
 		break;
@@ -1552,8 +1543,7 @@ static int cciss_engage_scsi(ctlr_info_t *h)
 	stk = &sa->cmd_stack; 
 
 	if (sa->registered) {
-		printk(KERN_INFO "cciss%d: SCSI subsystem already engaged.\n",
-			h->ctlr);
+		dev_info(&h->pdev->dev, "SCSI subsystem already engaged.\n");
 		spin_unlock_irqrestore(&h->lock, flags);
 		return -ENXIO;
 	}
@@ -1586,8 +1576,8 @@ static int wait_for_device_to_become_ready(ctlr_info_t *h,
 
 	c = cmd_alloc(h);
 	if (!c) {
-		printk(KERN_WARNING "cciss%d: out of memory in "
-			"wait_for_device_to_become_ready.\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "out of memory in "
+			"wait_for_device_to_become_ready.\n");
 		return IO_ERROR;
 	}
 
@@ -1631,16 +1621,16 @@ static int wait_for_device_to_become_ready(ctlr_info_t *h,
 			}
 		}
 retry_tur:
-		printk(KERN_WARNING "cciss%d: Waiting %d secs "
+		dev_warn(&h->pdev->dev, "Waiting %d secs "
 			"for device to become ready.\n",
-			h->ctlr, waittime / HZ);
+			waittime / HZ);
 		rc = 1; /* device not ready. */
 	}
 
 	if (rc)
-		printk("cciss%d: giving up on device.\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "giving up on device.\n");
 	else
-		printk(KERN_WARNING "cciss%d: device is ready.\n", h->ctlr);
+		dev_warn(&h->pdev->dev, "device is ready.\n");
 
 	cmd_free(h, c);
 	return rc;
@@ -1668,8 +1658,7 @@ static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
 	h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
 	if (h == NULL) /* paranoia */
 		return FAILED;
-	printk(KERN_WARNING
-		"cciss%d: resetting tape drive or medium changer.\n", h->ctlr);
+	dev_warn(&h->pdev->dev, "resetting tape drive or medium changer.\n");
 	/* find the command that's giving us trouble */
 	cmd_in_trouble = (CommandList_struct *) scsicmd->host_scribble;
 	if (cmd_in_trouble == NULL) /* paranoia */
@@ -1680,7 +1669,7 @@ static int cciss_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
 		TYPE_MSG);
 	if (rc == 0 && wait_for_device_to_become_ready(h, lunaddr) == 0)
 		return SUCCESS;
-	printk(KERN_WARNING "cciss%d: resetting device failed.\n", h->ctlr);
+	dev_warn(&h->pdev->dev, "resetting device failed.\n");
 	return FAILED;
 }
 
@@ -1695,7 +1684,7 @@ static int  cciss_eh_abort_handler(struct scsi_cmnd *scsicmd)
 	h = (ctlr_info_t *) scsicmd->device->host->hostdata[0];
 	if (h == NULL) /* paranoia */
 		return FAILED;
-	printk(KERN_WARNING "cciss%d: aborting tardy SCSI cmd\n", h->ctlr);
+	dev_warn(&h->pdev->dev, "aborting tardy SCSI cmd\n");
 
 	/* find the command to be aborted */
 	cmd_to_abort = (CommandList_struct *) scsicmd->host_scribble;
-- 
cgit v1.2.3


From 8112586063fe53958d60218631d661533f304504 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Date: Mon, 19 Jul 2010 13:46:54 -0500
Subject: cciss: cleanup interrupt_not_for_us

cciss: cleanup interrupt_not_for_us
In the case of MSI/MSIX interrutps, we don't need to check
if the interrupt is for us, and in the case of the intx interrupt
handler, when checking if the interrupt is for us, we don't need
to check if we're using MSI/MSIX, we know we're not.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cciss.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 35a9f08cf74f..fdf1b79eb347 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3376,8 +3376,7 @@ static inline int interrupt_pending(ctlr_info_t *h)
 
 static inline long interrupt_not_for_us(ctlr_info_t *h)
 {
-	return !(h->msi_vector || h->msix_vector) &&
-		((h->access.intr_pending(h) == 0) ||
+	return ((h->access.intr_pending(h) == 0) ||
 		(h->interrupts_enabled == 0));
 }
 
@@ -3470,10 +3469,6 @@ static irqreturn_t do_cciss_intx(int irq, void *dev_id)
 
 	if (interrupt_not_for_us(h))
 		return IRQ_NONE;
-	/*
-	 * If there are completed commands in the completion queue,
-	 * we had better do something about it.
-	 */
 	spin_lock_irqsave(&h->lock, flags);
 	while (interrupt_pending(h)) {
 		raw_tag = get_next_completion(h);
@@ -3484,7 +3479,6 @@ static irqreturn_t do_cciss_intx(int irq, void *dev_id)
 				raw_tag = process_nonindexed_cmd(h, raw_tag);
 		}
 	}
-
 	spin_unlock_irqrestore(&h->lock, flags);
 	return IRQ_HANDLED;
 }
@@ -3498,12 +3492,6 @@ static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
 	unsigned long flags;
 	u32 raw_tag;
 
-	if (interrupt_not_for_us(h))
-		return IRQ_NONE;
-	/*
-	 * If there are completed commands in the completion queue,
-	 * we had better do something about it.
-	 */
 	spin_lock_irqsave(&h->lock, flags);
 	raw_tag = get_next_completion(h);
 	while (raw_tag != FIFO_EMPTY) {
@@ -3512,7 +3500,6 @@ static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
 		else
 			raw_tag = process_nonindexed_cmd(h, raw_tag);
 	}
-
 	spin_unlock_irqrestore(&h->lock, flags);
 	return IRQ_HANDLED;
 }
-- 
cgit v1.2.3


From 6a32a8aed509e71137043d464db4a7fcd88c903e Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 21 Jul 2010 10:29:37 +0900
Subject: scsi: convert discard to REQ_TYPE_FS from REQ_TYPE_BLOCK_PC

Jens, any reason why this isn't included in your for-2.6.36 yet?

=
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Subject: [PATCH resend] scsi: convert discard to REQ_TYPE_FS from REQ_TYPE_BLOCK_PC

The block layer (file systems) sends discard requests as REQ_TYPE_FS
(the role of REQ_TYPE_FS is that setting up commands and interpreting
the results). But SCSI-ml treats discard requests as
REQ_TYPE_BLOCK_PC.

scsi-ml can handle discard requests as REQ_TYPE_FS
easily. scsi_setup_discard_cmnd() sets up struct request and the bio
nicely. Only remaining issue is that discard requests can't be
completed partially so we need to modify sd_done.

This conversion also fixes the problem that discard requests aren't
retried when possible (e.g. UNIT ATTENTION).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/sd.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index fc5d69a84af5..e63b85ac8cd1 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -434,7 +434,6 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 		nr_sectors >>= 3;
 	}
 
-	rq->cmd_type = REQ_TYPE_BLOCK_PC;
 	rq->timeout = SD_TIMEOUT;
 
 	memset(rq->cmd, 0, rq->cmd_len);
@@ -1200,6 +1199,12 @@ static int sd_done(struct scsi_cmnd *SCpnt)
 	int sense_valid = 0;
 	int sense_deferred = 0;
 
+	if (SCpnt->request->cmd_flags & REQ_DISCARD) {
+		if (!result)
+			scsi_set_resid(SCpnt, 0);
+		return good_bytes;
+	}
+
 	if (result) {
 		sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
 		if (sense_valid)
-- 
cgit v1.2.3


From ad96a7a7ea950d5bc9755f2f568be185c7070f1e Mon Sep 17 00:00:00 2001
From: Julia Lawall <julia@diku.dk>
Date: Tue, 20 Jul 2010 20:08:59 -0600
Subject: drivers/block: use memdup_user

Use memdup_user when user data is immediately copied into the
allocated region.  Some checkpatch cleanups in nearby code.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@

-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+  to = memdup_user(from,size);
   if (
-      to==NULL
+      IS_ERR(to)
                 || ...) {
   <+... when != goto l1;
-  -ENOMEM
+  PTR_ERR(to)
   ...+>
   }
-  if (copy_from_user(to, from, size) != 0) {
-    <+... when != goto l2;
-    -EFAULT
-    ...+>
-  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Chirag Kantharia <chirag.kantharia@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cpqarray.c | 32 ++++++++++----------------------
 1 file changed, 10 insertions(+), 22 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 28937b661564..9473215956f9 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -1255,17 +1255,11 @@ static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
 	/* Pre submit processing */
 	switch(io->cmd) {
 	case PASSTHRU_A:
-		p = kmalloc(io->sg[0].size, GFP_KERNEL);
-		if (!p) 
-		{ 
-			error = -ENOMEM; 
-			cmd_free(h, c, 0); 
-			return(error);
-		}
-		if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
-			kfree(p);
-			cmd_free(h, c, 0); 
-			return -EFAULT;
+		p = memdup_user(io->sg[0].addr, io->sg[0].size);
+		if (IS_ERR(p)) {
+			error = PTR_ERR(p);
+			cmd_free(h, c, 0);
+			return error;
 		}
 		c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c), 
 				sizeof(ida_ioctl_t), 
@@ -1296,18 +1290,12 @@ static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
 	case DIAG_PASS_THRU:
 	case COLLECT_BUFFER:
 	case WRITE_FLASH_ROM:
-		p = kmalloc(io->sg[0].size, GFP_KERNEL);
-		if (!p) 
- 		{ 
-                        error = -ENOMEM; 
-                        cmd_free(h, c, 0);
-                        return(error);
+		p = memdup_user(io->sg[0].addr, io->sg[0].size);
+		if (IS_ERR(p)) {
+			error = PTR_ERR(p);
+			cmd_free(h, c, 0);
+			return error;
                 }
-		if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
-			kfree(p);
-                        cmd_free(h, c, 0);
-			return -EFAULT;
-		}
 		c->req.sg[0].size = io->sg[0].size;
 		c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
 			c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL); 
-- 
cgit v1.2.3


From 3b06c21e8462b77186613e70db286cfa8616088b Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 20 Jul 2010 20:09:00 -0600
Subject: floppy: make controller const

The struct cont_t is just a set of virtual function pointers.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/floppy.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 3126d5122b2b..cf04c1b234ed 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -538,7 +538,7 @@ static int max_buffer_sectors;
 
 static int *errors;
 typedef void (*done_f)(int);
-static struct cont_t {
+static const struct cont_t {
 	void (*interrupt)(void);
 				/* this is called after the interrupt of the
 				 * main command */
@@ -1970,14 +1970,14 @@ static void do_wakeup(void)
 	wake_up(&command_done);
 }
 
-static struct cont_t wakeup_cont = {
+static const struct cont_t wakeup_cont = {
 	.interrupt	= empty,
 	.redo		= do_wakeup,
 	.error		= empty,
 	.done		= (done_f)empty
 };
 
-static struct cont_t intr_cont = {
+static const struct cont_t intr_cont = {
 	.interrupt	= empty,
 	.redo		= process_fd_request,
 	.error		= empty,
@@ -2183,7 +2183,7 @@ static void redo_format(void)
 	debugt(__func__, "queue format request");
 }
 
-static struct cont_t format_cont = {
+static const struct cont_t format_cont = {
 	.interrupt	= format_interrupt,
 	.redo		= redo_format,
 	.error		= bad_flp_intr,
@@ -2879,7 +2879,7 @@ do_request:
 	return;
 }
 
-static struct cont_t rw_cont = {
+static const struct cont_t rw_cont = {
 	.interrupt	= rw_interrupt,
 	.redo		= redo_fd_request,
 	.error		= bad_flp_intr,
@@ -2915,7 +2915,7 @@ static void do_fd_request(struct request_queue *q)
 	is_alive(__func__, "");
 }
 
-static struct cont_t poll_cont = {
+static const struct cont_t poll_cont = {
 	.interrupt	= success_and_wakeup,
 	.redo		= floppy_ready,
 	.error		= generic_failure,
@@ -2946,7 +2946,7 @@ static void reset_intr(void)
 	pr_info("weird, reset interrupt called\n");
 }
 
-static struct cont_t reset_cont = {
+static const struct cont_t reset_cont = {
 	.interrupt	= reset_intr,
 	.redo		= success_and_wakeup,
 	.error		= generic_failure,
@@ -3051,7 +3051,7 @@ static void raw_cmd_done(int flag)
 	generic_done(flag);
 }
 
-static struct cont_t raw_cmd_cont = {
+static const struct cont_t raw_cmd_cont = {
 	.interrupt	= success_and_wakeup,
 	.redo		= floppy_start,
 	.error		= generic_failure,
-- 
cgit v1.2.3


From e96f6abe02fc3320d669985443e8c68ff8e83294 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Fri, 9 Jul 2010 09:38:26 +0900
Subject: scsi: use REQ_TYPE_FS for flush request

scsi-ml uses REQ_TYPE_BLOCK_PC for flush requests from file
systems. The definition of REQ_TYPE_BLOCK_PC is that we don't retry
requests even when we can (e.g. UNIT ATTENTION) and we send the
response to the callers (then the callers can decide what they want).
We need a workaround such as the commit
77a4229719e511a0d38d9c355317ae1469adeb54 to retry BLOCK_PC flush
requests. We will need the similar workaround for discard requests too
since SCSI-ml handle them as BLOCK_PC internally.

This uses REQ_TYPE_FS for flush requests from file systems instead of
REQ_TYPE_BLOCK_PC.

scsi-ml retries only REQ_TYPE_FS requests that have data to
transfer when we can retry them (e.g. UNIT_ATTENTION). However, we
also need to retry REQ_TYPE_FS requests without data because the
callers don't.

This also changes scsi_check_sense() to retry all the REQ_TYPE_FS
requests when appropriate. Thanks to scsi_noretry_cmd(),
REQ_TYPE_BLOCK_PC requests don't be retried as before.

Note that basically, this reverts the commit
77a4229719e511a0d38d9c355317ae1469adeb54 since now we use REQ_TYPE_FS
for flush requests.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/scsi/scsi_error.c | 19 ++++---------------
 drivers/scsi/sd.c         |  2 --
 2 files changed, 4 insertions(+), 17 deletions(-)

(limited to 'drivers')

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 1b88af89d0c7..2768bf6ffe59 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -307,20 +307,7 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
 		    (sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
 			return FAILED;
 
-		if (scmd->request->cmd_flags & REQ_HARDBARRIER)
-			/*
-			 * barrier requests should always retry on UA
-			 * otherwise block will get a spurious error
-			 */
-			return NEEDS_RETRY;
-		else
-			/*
-			 * for normal (non barrier) commands, pass the
-			 * UA upwards for a determination in the
-			 * completion functions
-			 */
-			return SUCCESS;
-
+		return NEEDS_RETRY;
 		/* these three are not supported */
 	case COPY_ABORTED:
 	case VOLUME_OVERFLOW:
@@ -1336,7 +1323,9 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
 		 * assume caller has checked sense and determinted
 		 * the check condition was retryable.
 		 */
-		return (scmd->request->cmd_flags & REQ_FAILFAST_DEV);
+		if (scmd->request->cmd_flags & REQ_FAILFAST_DEV ||
+		    scmd->request->cmd_type == REQ_TYPE_BLOCK_PC)
+			return 1;
 	}
 
 	return 0;
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e63b85ac8cd1..108daead7ae8 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -477,8 +477,6 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
 
 static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq)
 {
-	/* for now, we use REQ_TYPE_BLOCK_PC. */
-	rq->cmd_type = REQ_TYPE_BLOCK_PC;
 	rq->timeout = SD_TIMEOUT;
 	rq->retries = SD_MAX_RETRIES;
 	rq->cmd[0] = SYNCHRONIZE_CACHE;
-- 
cgit v1.2.3


From 4dab46ff26c6003a13ec769312c50938b93c359d Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Thu, 22 Jul 2010 14:17:00 -0700
Subject: xen/blkfront: use tagged queuing for barriers

When barriers are supported, then use QUEUE_ORDERED_TAG to tell the block
subsystem that it doesn't need to do anything else with the barriers.
Previously we used ORDERED_DRAIN which caused the block subsystem to
drain all pending IO before submitting the barrier, which would be
very expensive.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index c6727b5cefd6..6d912ab47292 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -420,9 +420,19 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
 static int xlvbd_barrier(struct blkfront_info *info)
 {
 	int err;
+	unsigned ordered = QUEUE_ORDERED_NONE;
 
-	err = blk_queue_ordered(info->rq,
-				info->feature_barrier ? QUEUE_ORDERED_DRAIN : QUEUE_ORDERED_NONE);
+	/*
+	 * If we don't have barrier support, then there's really no
+	 * way to guarantee write ordering, so we really just have to
+	 * send writes to the backend and hope for the best.  If
+	 * barriers are supported then we can treat them as proper
+	 * ordering tags.
+	 */
+	if (info->feature_barrier)
+		ordered = QUEUE_ORDERED_TAG;
+
+	err = blk_queue_ordered(info->rq, ordered);
 
 	if (err)
 		return err;
@@ -509,8 +519,7 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
 	info->rq = gd->queue;
 	info->gd = gd;
 
-	if (info->feature_barrier)
-		xlvbd_barrier(info);
+	xlvbd_barrier(info);
 
 	if (vdisk_info & VDISK_READONLY)
 		set_disk_ro(gd, 1);
-- 
cgit v1.2.3


From 7901d14144311c930918b1222aae7611284c63eb Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Wed, 28 Jul 2010 10:49:29 -0700
Subject: xen/blkfront: Use QUEUE_ORDERED_DRAIN for old backends

If there's no feature-barrier key in xenstore, then it means its a fairly
old backend which does uncached in-order writes, which means ORDERED_DRAIN
is appropriate.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 drivers/block/xen-blkfront.c | 45 ++++++++++++++++++++++++++++----------------
 1 file changed, 29 insertions(+), 16 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 6d912ab47292..ae5f92b5752e 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -420,26 +420,22 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
 static int xlvbd_barrier(struct blkfront_info *info)
 {
 	int err;
-	unsigned ordered = QUEUE_ORDERED_NONE;
+	const char *barrier;
 
-	/*
-	 * If we don't have barrier support, then there's really no
-	 * way to guarantee write ordering, so we really just have to
-	 * send writes to the backend and hope for the best.  If
-	 * barriers are supported then we can treat them as proper
-	 * ordering tags.
-	 */
-	if (info->feature_barrier)
-		ordered = QUEUE_ORDERED_TAG;
+	switch (info->feature_barrier) {
+	case QUEUE_ORDERED_DRAIN:	barrier = "enabled (drain)"; break;
+	case QUEUE_ORDERED_TAG:		barrier = "enabled (tag)"; break;
+	case QUEUE_ORDERED_NONE:	barrier = "disabled"; break;
+	default:			return -EINVAL;
+	}
 
-	err = blk_queue_ordered(info->rq, ordered);
+	err = blk_queue_ordered(info->rq, info->feature_barrier);
 
 	if (err)
 		return err;
 
 	printk(KERN_INFO "blkfront: %s: barriers %s\n",
-	       info->gd->disk_name,
-	       info->feature_barrier ? "enabled" : "disabled");
+	       info->gd->disk_name, barrier);
 	return 0;
 }
 
@@ -665,7 +661,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
 				printk(KERN_WARNING "blkfront: %s: write barrier op failed\n",
 				       info->gd->disk_name);
 				error = -EOPNOTSUPP;
-				info->feature_barrier = 0;
+				info->feature_barrier = QUEUE_ORDERED_NONE;
 				xlvbd_barrier(info);
 			}
 			/* fall through */
@@ -1003,6 +999,7 @@ static void blkfront_connect(struct blkfront_info *info)
 	unsigned long sector_size;
 	unsigned int binfo;
 	int err;
+	int barrier;
 
 	switch (info->connected) {
 	case BLKIF_STATE_CONNECTED:
@@ -1043,10 +1040,26 @@ static void blkfront_connect(struct blkfront_info *info)
 	}
 
 	err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
-			    "feature-barrier", "%lu", &info->feature_barrier,
+			    "feature-barrier", "%lu", &barrier,
 			    NULL);
+
+	/*
+	 * If there's no "feature-barrier" defined, then it means
+	 * we're dealing with a very old backend which writes
+	 * synchronously; draining will do what needs to get done.
+	 *
+	 * If there are barriers, then we can do full queued writes
+	 * with tagged barriers.
+	 *
+	 * If barriers are not supported, then there's no much we can
+	 * do, so just set ordering to NONE.
+	 */
 	if (err)
-		info->feature_barrier = 0;
+		info->feature_barrier = QUEUE_ORDERED_DRAIN;
+	else if (barrier)
+		info->feature_barrier = QUEUE_ORDERED_TAG;
+	else
+		info->feature_barrier = QUEUE_ORDERED_NONE;
 
 	err = xlvbd_alloc_gendisk(sectors, info, binfo, sector_size);
 	if (err) {
-- 
cgit v1.2.3


From f6c4c8e19a087dae7dc651ccbd1ff8b843eedee2 Mon Sep 17 00:00:00 2001
From: Kulikov Vasiliy <segooon@gmail.com>
Date: Tue, 3 Aug 2010 12:52:55 +0200
Subject: cpqarray: check put_user() result

put_user() may fail, if so return -EFAULT.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Acked-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/cpqarray.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 9473215956f9..d53b0291c44b 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -1179,7 +1179,8 @@ out_passthru:
 		return error;
 	case IDAGETCTLRSIG:
 		if (!arg) return -EINVAL;
-		put_user(host->ctlr_sig, (int __user *)arg);
+		if (put_user(host->ctlr_sig, (int __user *)arg))
+			return -EFAULT;
 		return 0;
 	case IDAREVALIDATEVOLS:
 		if (MINOR(bdev->bd_dev) != 0)
@@ -1187,7 +1188,8 @@ out_passthru:
 		return revalidate_allvol(host);
 	case IDADRIVERVERSION:
 		if (!arg) return -EINVAL;
-		put_user(DRIVER_VERSION, (unsigned long __user *)arg);
+		if (put_user(DRIVER_VERSION, (unsigned long __user *)arg))
+			return -EFAULT;
 		return 0;
 	case IDAGETPCIINFO:
 	{
-- 
cgit v1.2.3


From 6710a5760355be8f2e51682f41b0d3fc76550309 Mon Sep 17 00:00:00 2001
From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Mon, 19 Jul 2010 15:04:57 +0200
Subject: drbd: Disable delay probes for the upcomming release

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/drbd/drbd_main.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index d2b6764a7b1f..0c1e84a751d7 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2371,11 +2371,7 @@ static int _drbd_send_zc_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e)
 
 static void consider_delay_probes(struct drbd_conf *mdev)
 {
-	if (mdev->state.conn != C_SYNC_SOURCE || mdev->agreed_pro_version < 93)
-		return;
-
-	if (mdev->dp_volume_last + mdev->sync_conf.dp_volume * 2 < mdev->send_cnt)
-		drbd_send_delay_probes(mdev);
+	return;
 }
 
 static int w_delay_probes(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
-- 
cgit v1.2.3


From 85f4cc17a62c3ac9edeaf120cdae7261df458053 Mon Sep 17 00:00:00 2001
From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Tue, 29 Jun 2010 17:35:34 +0200
Subject: drbd: Initialize all members of sync_conf to their defaults [Bugz
 315]

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/drbd/drbd_main.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 0c1e84a751d7..668f06378214 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2660,9 +2660,24 @@ static void drbd_unplug_fn(struct request_queue *q)
 
 static void drbd_set_defaults(struct drbd_conf *mdev)
 {
-	mdev->sync_conf.after      = DRBD_AFTER_DEF;
-	mdev->sync_conf.rate       = DRBD_RATE_DEF;
-	mdev->sync_conf.al_extents = DRBD_AL_EXTENTS_DEF;
+	/* This way we get a compile error when sync_conf grows,
+	   and we forgot to initialize it here */
+	mdev->sync_conf = (struct syncer_conf) {
+		/* .rate = */		DRBD_RATE_DEF,
+		/* .after = */		DRBD_AFTER_DEF,
+		/* .al_extents = */	DRBD_AL_EXTENTS_DEF,
+		/* .dp_volume = */	DRBD_DP_VOLUME_DEF,
+		/* .dp_interval = */	DRBD_DP_INTERVAL_DEF,
+		/* .throttle_th = */	DRBD_RS_THROTTLE_TH_DEF,
+		/* .hold_off_th = */	DRBD_RS_HOLD_OFF_TH_DEF,
+		/* .verify_alg = */	{}, 0,
+		/* .cpu_mask = */	{}, 0,
+		/* .csums_alg = */	{}, 0,
+		/* .use_rle = */	0
+	};
+
+	/* Have to use that way, because the layout differs between
+	   big endian and little endian */
 	mdev->state = (union drbd_state) {
 		{ .role = R_SECONDARY,
 		  .peer = R_UNKNOWN,
-- 
cgit v1.2.3


From e7f52dfb4f378ea1bbfd4476f4e8ba42f5fb332c Mon Sep 17 00:00:00 2001
From: Lars Ellenberg <lars.ellenberg@linbit.com>
Date: Tue, 3 Aug 2010 20:20:20 +0200
Subject: drbd: revert "delay probes", feature is being re-implemented
 differently

It was a now abandoned attempt to throttle resync bandwidth
based on the delay it causes on the bulk data socket.
It has no userbase yet, and has been disabled by
9173465ccb51c09cc3102a10af93e9f469a0af6f already.
This removes the now unused code.

The basic feature, namely using up "idle" bandwith
of network and disk IO subsystem, with minimal impact
to application IO, is being reimplemented differently.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/drbd/drbd_int.h      |  16 +-----
 drivers/block/drbd/drbd_main.c     |  75 ------------------------
 drivers/block/drbd/drbd_nl.c       |   4 --
 drivers/block/drbd/drbd_proc.c     |  19 +------
 drivers/block/drbd/drbd_receiver.c | 113 ++++++-------------------------------
 drivers/block/drbd/drbd_worker.c   |  15 +----
 6 files changed, 22 insertions(+), 220 deletions(-)

(limited to 'drivers')

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 485ed8c7d623..352441b0f92f 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -550,12 +550,6 @@ struct p_delay_probe {
 	u32	offset;	 /* usecs the probe got sent after the reference time point */
 } __packed;
 
-struct delay_probe {
-	struct list_head list;
-	unsigned int seq_num;
-	struct timeval time;
-};
-
 /* DCBP: Drbd Compressed Bitmap Packet ... */
 static inline enum drbd_bitmap_code
 DCBP_get_code(struct p_compressed_bm *p)
@@ -942,11 +936,9 @@ struct drbd_conf {
 	unsigned int ko_count;
 	struct drbd_work  resync_work,
 			  unplug_work,
-			  md_sync_work,
-			  delay_probe_work;
+			  md_sync_work;
 	struct timer_list resync_timer;
 	struct timer_list md_sync_timer;
-	struct timer_list delay_probe_timer;
 
 	/* Used after attach while negotiating new disk state. */
 	union drbd_state new_state_tmp;
@@ -1062,12 +1054,6 @@ struct drbd_conf {
 	u64 ed_uuid; /* UUID of the exposed data */
 	struct mutex state_mutex;
 	char congestion_reason;  /* Why we where congested... */
-	struct list_head delay_probes; /* protected by peer_seq_lock */
-	int data_delay;   /* Delay of packets on the data-sock behind meta-sock */
-	unsigned int delay_seq; /* To generate sequence numbers of delay probes */
-	struct timeval dps_time; /* delay-probes-start-time */
-	unsigned int dp_volume_last;  /* send_cnt of last delay probe */
-	int c_sync_rate; /* current resync rate after delay_probe magic */
 };
 
 static inline struct drbd_conf *minor_to_mdev(unsigned int minor)
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 668f06378214..fa650dd85b90 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2184,43 +2184,6 @@ int drbd_send_ov_request(struct drbd_conf *mdev, sector_t sector, int size)
 	return ok;
 }
 
-static int drbd_send_delay_probe(struct drbd_conf *mdev, struct drbd_socket *ds)
-{
-	struct p_delay_probe dp;
-	int offset, ok = 0;
-	struct timeval now;
-
-	mutex_lock(&ds->mutex);
-	if (likely(ds->socket)) {
-		do_gettimeofday(&now);
-		offset = now.tv_usec - mdev->dps_time.tv_usec +
-			 (now.tv_sec - mdev->dps_time.tv_sec) * 1000000;
-		dp.seq_num  = cpu_to_be32(mdev->delay_seq);
-		dp.offset   = cpu_to_be32(offset);
-
-		ok = _drbd_send_cmd(mdev, ds->socket, P_DELAY_PROBE,
-				    (struct p_header *)&dp, sizeof(dp), 0);
-	}
-	mutex_unlock(&ds->mutex);
-
-	return ok;
-}
-
-static int drbd_send_delay_probes(struct drbd_conf *mdev)
-{
-	int ok;
-
-	mdev->delay_seq++;
-	do_gettimeofday(&mdev->dps_time);
-	ok = drbd_send_delay_probe(mdev, &mdev->meta);
-	ok = ok && drbd_send_delay_probe(mdev, &mdev->data);
-
-	mdev->dp_volume_last = mdev->send_cnt;
-	mod_timer(&mdev->delay_probe_timer, jiffies + mdev->sync_conf.dp_interval * HZ / 10);
-
-	return ok;
-}
-
 /* called on sndtimeo
  * returns FALSE if we should retry,
  * TRUE if we think connection is dead
@@ -2369,27 +2332,6 @@ static int _drbd_send_zc_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e)
 	return 1;
 }
 
-static void consider_delay_probes(struct drbd_conf *mdev)
-{
-	return;
-}
-
-static int w_delay_probes(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
-{
-	if (!cancel && mdev->state.conn == C_SYNC_SOURCE)
-		drbd_send_delay_probes(mdev);
-
-	return 1;
-}
-
-static void delay_probe_timer_fn(unsigned long data)
-{
-	struct drbd_conf *mdev = (struct drbd_conf *) data;
-
-	if (list_empty(&mdev->delay_probe_work.list))
-		drbd_queue_work(&mdev->data.work, &mdev->delay_probe_work);
-}
-
 /* Used to send write requests
  * R_PRIMARY -> Peer	(P_DATA)
  */
@@ -2453,9 +2395,6 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
 
 	drbd_put_data_sock(mdev);
 
-	if (ok)
-		consider_delay_probes(mdev);
-
 	return ok;
 }
 
@@ -2502,9 +2441,6 @@ int drbd_send_block(struct drbd_conf *mdev, enum drbd_packets cmd,
 
 	drbd_put_data_sock(mdev);
 
-	if (ok)
-		consider_delay_probes(mdev);
-
 	return ok;
 }
 
@@ -2666,10 +2602,6 @@ static void drbd_set_defaults(struct drbd_conf *mdev)
 		/* .rate = */		DRBD_RATE_DEF,
 		/* .after = */		DRBD_AFTER_DEF,
 		/* .al_extents = */	DRBD_AL_EXTENTS_DEF,
-		/* .dp_volume = */	DRBD_DP_VOLUME_DEF,
-		/* .dp_interval = */	DRBD_DP_INTERVAL_DEF,
-		/* .throttle_th = */	DRBD_RS_THROTTLE_TH_DEF,
-		/* .hold_off_th = */	DRBD_RS_HOLD_OFF_TH_DEF,
 		/* .verify_alg = */	{}, 0,
 		/* .cpu_mask = */	{}, 0,
 		/* .csums_alg = */	{}, 0,
@@ -2736,24 +2668,17 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
 	INIT_LIST_HEAD(&mdev->unplug_work.list);
 	INIT_LIST_HEAD(&mdev->md_sync_work.list);
 	INIT_LIST_HEAD(&mdev->bm_io_work.w.list);
-	INIT_LIST_HEAD(&mdev->delay_probes);
-	INIT_LIST_HEAD(&mdev->delay_probe_work.list);
 
 	mdev->resync_work.cb  = w_resync_inactive;
 	mdev->unplug_work.cb  = w_send_write_hint;
 	mdev->md_sync_work.cb = w_md_sync;
 	mdev->bm_io_work.w.cb = w_bitmap_io;
-	mdev->delay_probe_work.cb = w_delay_probes;
 	init_timer(&mdev->resync_timer);
 	init_timer(&mdev->md_sync_timer);
-	init_timer(&mdev->delay_probe_timer);
 	mdev->resync_timer.function = resync_timer_fn;
 	mdev->resync_timer.data = (unsigned long) mdev;
 	mdev->md_sync_timer.function = md_sync_timer_fn;
 	mdev->md_sync_timer.data = (unsigned long) mdev;
-	mdev->delay_probe_timer.function = delay_probe_timer_fn;
-	mdev->delay_probe_timer.data = (unsigned long) mdev;
-
 
 	init_waitqueue_head(&mdev->misc_wait);
 	init_waitqueue_head(&mdev->state_wait);
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 2151f18b21de..73131c5ae339 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1557,10 +1557,6 @@ static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n
 		sc.rate       = DRBD_RATE_DEF;
 		sc.after      = DRBD_AFTER_DEF;
 		sc.al_extents = DRBD_AL_EXTENTS_DEF;
-		sc.dp_volume  = DRBD_DP_VOLUME_DEF;
-		sc.dp_interval = DRBD_DP_INTERVAL_DEF;
-		sc.throttle_th = DRBD_RS_THROTTLE_TH_DEF;
-		sc.hold_off_th = DRBD_RS_HOLD_OFF_TH_DEF;
 	} else
 		memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf));
 
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c
index d0f1767ea4c3..be3374b68460 100644
--- a/drivers/block/drbd/drbd_proc.c
+++ b/drivers/block/drbd/drbd_proc.c
@@ -73,21 +73,14 @@ static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
 	seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10);
 	/* if more than 1 GB display in MB */
 	if (mdev->rs_total > 0x100000L)
-		seq_printf(seq, "(%lu/%lu)M",
+		seq_printf(seq, "(%lu/%lu)M\n\t",
 			    (unsigned long) Bit2KB(rs_left >> 10),
 			    (unsigned long) Bit2KB(mdev->rs_total >> 10));
 	else
-		seq_printf(seq, "(%lu/%lu)K",
+		seq_printf(seq, "(%lu/%lu)K\n\t",
 			    (unsigned long) Bit2KB(rs_left),
 			    (unsigned long) Bit2KB(mdev->rs_total));
 
-	if (mdev->state.conn == C_SYNC_TARGET)
-		seq_printf(seq, " queue_delay: %d.%d ms\n\t",
-			   mdev->data_delay / 1000,
-			   (mdev->data_delay % 1000) / 100);
-	else if (mdev->state.conn == C_SYNC_SOURCE)
-		seq_printf(seq, " delay_probe: %u\n\t", mdev->delay_seq);
-
 	/* see drivers/md/md.c
 	 * We do not want to overflow, so the order of operands and
 	 * the * 100 / 100 trick are important. We do a +1 to be
@@ -135,14 +128,6 @@ static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
 	else
 		seq_printf(seq, " (%ld)", dbdt);
 
-	if (mdev->state.conn == C_SYNC_TARGET) {
-		if (mdev->c_sync_rate > 1000)
-			seq_printf(seq, " want: %d,%03d",
-				   mdev->c_sync_rate / 1000, mdev->c_sync_rate % 1000);
-		else
-			seq_printf(seq, " want: %d", mdev->c_sync_rate);
-	}
-
 	seq_printf(seq, " K/sec\n");
 }
 
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index cba1deb7b271..20abef531c99 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3555,14 +3555,15 @@ static int receive_bitmap(struct drbd_conf *mdev, struct p_header *h)
 	return ok;
 }
 
-static int receive_skip(struct drbd_conf *mdev, struct p_header *h)
+static int receive_skip_(struct drbd_conf *mdev, struct p_header *h, int silent)
 {
 	/* TODO zero copy sink :) */
 	static char sink[128];
 	int size, want, r;
 
-	dev_warn(DEV, "skipping unknown optional packet type %d, l: %d!\n",
-	     h->command, h->length);
+	if (!silent)
+		dev_warn(DEV, "skipping unknown optional packet type %d, l: %d!\n",
+		     h->command, h->length);
 
 	size = h->length;
 	while (size > 0) {
@@ -3574,101 +3575,25 @@ static int receive_skip(struct drbd_conf *mdev, struct p_header *h)
 	return size == 0;
 }
 
-static int receive_UnplugRemote(struct drbd_conf *mdev, struct p_header *h)
-{
-	if (mdev->state.disk >= D_INCONSISTENT)
-		drbd_kick_lo(mdev);
-
-	/* Make sure we've acked all the TCP data associated
-	 * with the data requests being unplugged */
-	drbd_tcp_quickack(mdev->data.socket);
-
-	return TRUE;
-}
-
-static void timeval_sub_us(struct timeval* tv, unsigned int us)
+static int receive_skip(struct drbd_conf *mdev, struct p_header *h)
 {
-	tv->tv_sec -= us / 1000000;
-	us = us % 1000000;
-	if (tv->tv_usec > us) {
-		tv->tv_usec += 1000000;
-		tv->tv_sec--;
-	}
-	tv->tv_usec -= us;
+	return receive_skip_(mdev, h, 0);
 }
 
-static void got_delay_probe(struct drbd_conf *mdev, int from, struct p_delay_probe *p)
+static int receive_skip_silent(struct drbd_conf *mdev, struct p_header *h)
 {
-	struct delay_probe *dp;
-	struct list_head *le;
-	struct timeval now;
-	int seq_num;
-	int offset;
-	int data_delay;
-
-	seq_num = be32_to_cpu(p->seq_num);
-	offset  = be32_to_cpu(p->offset);
-
-	spin_lock(&mdev->peer_seq_lock);
-	if (!list_empty(&mdev->delay_probes)) {
-		if (from == USE_DATA_SOCKET)
-			le = mdev->delay_probes.next;
-		else
-			le = mdev->delay_probes.prev;
-
-		dp = list_entry(le, struct delay_probe, list);
-
-		if (dp->seq_num == seq_num) {
-			list_del(le);
-			spin_unlock(&mdev->peer_seq_lock);
-			do_gettimeofday(&now);
-			timeval_sub_us(&now, offset);
-			data_delay =
-				now.tv_usec - dp->time.tv_usec +
-				(now.tv_sec - dp->time.tv_sec) * 1000000;
-
-			if (data_delay > 0)
-				mdev->data_delay = data_delay;
-
-			kfree(dp);
-			return;
-		}
-
-		if (dp->seq_num > seq_num) {
-			spin_unlock(&mdev->peer_seq_lock);
-			dev_warn(DEV, "Previous allocation failure of struct delay_probe?\n");
-			return; /* Do not alloca a struct delay_probe.... */
-		}
-	}
-	spin_unlock(&mdev->peer_seq_lock);
-
-	dp = kmalloc(sizeof(struct delay_probe), GFP_NOIO);
-	if (!dp) {
-		dev_warn(DEV, "Failed to allocate a struct delay_probe, do not worry.\n");
-		return;
-	}
-
-	dp->seq_num = seq_num;
-	do_gettimeofday(&dp->time);
-	timeval_sub_us(&dp->time, offset);
-
-	spin_lock(&mdev->peer_seq_lock);
-	if (from == USE_DATA_SOCKET)
-		list_add(&dp->list, &mdev->delay_probes);
-	else
-		list_add_tail(&dp->list, &mdev->delay_probes);
-	spin_unlock(&mdev->peer_seq_lock);
+	return receive_skip_(mdev, h, 1);
 }
 
-static int receive_delay_probe(struct drbd_conf *mdev, struct p_header *h)
+static int receive_UnplugRemote(struct drbd_conf *mdev, struct p_header *h)
 {
-	struct p_delay_probe *p = (struct p_delay_probe *)h;
+	if (mdev->state.disk >= D_INCONSISTENT)
+		drbd_kick_lo(mdev);
 
-	ERR_IF(h->length != (sizeof(*p)-sizeof(*h))) return FALSE;
-	if (drbd_recv(mdev, h->payload, h->length) != h->length)
-		return FALSE;
+	/* Make sure we've acked all the TCP data associated
+	 * with the data requests being unplugged */
+	drbd_tcp_quickack(mdev->data.socket);
 
-	got_delay_probe(mdev, USE_DATA_SOCKET, p);
 	return TRUE;
 }
 
@@ -3695,7 +3620,7 @@ static drbd_cmd_handler_f drbd_default_handler[] = {
 	[P_OV_REQUEST]      = receive_DataRequest,
 	[P_OV_REPLY]        = receive_DataRequest,
 	[P_CSUM_RS_REQUEST]    = receive_DataRequest,
-	[P_DELAY_PROBE]     = receive_delay_probe,
+	[P_DELAY_PROBE]     = receive_skip_silent,
 	/* anything missing from this table is in
 	 * the asender_tbl, see get_asender_cmd */
 	[P_MAX_CMD]	    = NULL,
@@ -4472,11 +4397,9 @@ static int got_OVResult(struct drbd_conf *mdev, struct p_header *h)
 	return TRUE;
 }
 
-static int got_delay_probe_m(struct drbd_conf *mdev, struct p_header *h)
+static int got_something_to_ignore_m(struct drbd_conf *mdev, struct p_header *h)
 {
-	struct p_delay_probe *p = (struct p_delay_probe *)h;
-
-	got_delay_probe(mdev, USE_META_SOCKET, p);
+	/* IGNORE */
 	return TRUE;
 }
 
@@ -4504,7 +4427,7 @@ static struct asender_cmd *get_asender_cmd(int cmd)
 	[P_BARRIER_ACK]	    = { sizeof(struct p_barrier_ack), got_BarrierAck },
 	[P_STATE_CHG_REPLY] = { sizeof(struct p_req_state_reply), got_RqSReply },
 	[P_RS_IS_IN_SYNC]   = { sizeof(struct p_block_ack), got_IsInSync },
-	[P_DELAY_PROBE]     = { sizeof(struct p_delay_probe), got_delay_probe_m },
+	[P_DELAY_PROBE]     = { sizeof(struct p_delay_probe), got_something_to_ignore_m },
 	[P_MAX_CMD]	    = { 0, NULL },
 	};
 	if (cmd > P_MAX_CMD || asender_tbl[cmd].process == NULL)
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index b623ceee2a4a..ca4a16cea2d8 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -424,18 +424,6 @@ void resync_timer_fn(unsigned long data)
 		drbd_queue_work(&mdev->data.work, &mdev->resync_work);
 }
 
-static int calc_resync_rate(struct drbd_conf *mdev)
-{
-	int d = mdev->data_delay / 1000; /* us -> ms */
-	int td = mdev->sync_conf.throttle_th * 100;  /* 0.1s -> ms */
-	int hd = mdev->sync_conf.hold_off_th * 100;  /* 0.1s -> ms */
-	int cr = mdev->sync_conf.rate;
-
-	return d <= td ? cr :
-		d >= hd ? 0 :
-		cr + (cr * (td - d) / (hd - td));
-}
-
 int w_make_resync_request(struct drbd_conf *mdev,
 		struct drbd_work *w, int cancel)
 {
@@ -473,8 +461,7 @@ int w_make_resync_request(struct drbd_conf *mdev,
 	max_segment_size = mdev->agreed_pro_version < 94 ?
 		queue_max_segment_size(mdev->rq_queue) : DRBD_MAX_SEGMENT_SIZE;
 
-	mdev->c_sync_rate = calc_resync_rate(mdev);
-	number = SLEEP_TIME * mdev->c_sync_rate  / ((BM_BLOCK_SIZE / 1024) * HZ);
+	number = SLEEP_TIME * mdev->sync_conf.rate  / ((BM_BLOCK_SIZE / 1024) * HZ);
 	pe = atomic_read(&mdev->rs_pending_cnt);
 
 	mutex_lock(&mdev->data.mutex);
-- 
cgit v1.2.3


From a4cc14ec9f0ef579262a81170a2eaf760844c471 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jaxboe@fusionio.com>
Date: Sun, 8 Aug 2010 21:50:05 -0400
Subject: xen-blkfront: fix missing out label

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
 drivers/block/xen-blkfront.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index ae5f92b5752e..67d9bfab59fa 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1232,6 +1232,7 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
 		kfree(info);
 	}
 
+out:
 	unlock_kernel();
 	return 0;
 }
-- 
cgit v1.2.3