1 files changed, 40 insertions, 146 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 696525342e9a..661b75a89d4d 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -358,31 +358,6 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
 
 EXPORT_SYMBOL(ide_end_drive_cmd);
 
-/**
- *	try_to_flush_leftover_data	-	flush junk
- *	@drive: drive to flush
- *
- *	try_to_flush_leftover_data() is invoked in response to a drive
- *	unexpectedly having its DRQ_STAT bit set.  As an alternative to
- *	resetting the drive, this routine tries to clear the condition
- *	by read a sector's worth of data from the drive.  Of course,
- *	this may not help if the drive is *waiting* for data from *us*.
- */
-static void try_to_flush_leftover_data (ide_drive_t *drive)
-{
-	int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS;
-
-	if (drive->media != ide_disk)
-		return;
-	while (i > 0) {
-		u32 buffer[16];
-		u32 wcount = (i > 16) ? 16 : i;
-
-		i -= wcount;
-		drive->hwif->input_data(drive, NULL, buffer, wcount * 4);
-	}
-}
-
 static void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 {
 	if (rq->rq_disk) {
@@ -422,8 +397,11 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8
 	}
 
 	if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ &&
-	    (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0)
-		try_to_flush_leftover_data(drive);
+	    (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) {
+		int nsect = drive->mult_count ? drive->mult_count : 1;
+
+		ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
+	}
 
 	if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
 		ide_kill_rq(drive, rq);
@@ -459,7 +437,7 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u
 
 	if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
 		/* force an abort */
-		hwif->OUTBSYNC(drive, WIN_IDLEIMMEDIATE,
+		hwif->OUTBSYNC(hwif, WIN_IDLEIMMEDIATE,
 			       hwif->io_ports.command_addr);
 
 	if (rq->errors >= ERROR_MAX) {
@@ -526,55 +504,6 @@ ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, u8 stat)
 
 EXPORT_SYMBOL_GPL(ide_error);
 
-ide_startstop_t __ide_abort(ide_drive_t *drive, struct request *rq)
-{
-	if (drive->media != ide_disk)
-		rq->errors |= ERROR_RESET;
-
-	ide_kill_rq(drive, rq);
-
-	return ide_stopped;
-}
-
-EXPORT_SYMBOL_GPL(__ide_abort);
-
-/**
- *	ide_abort	-	abort pending IDE operations
- *	@drive: drive the error occurred on
- *	@msg: message to report
- *
- *	ide_abort kills and cleans up when we are about to do a 
- *	host initiated reset on active commands. Longer term we
- *	want handlers to have sensible abort handling themselves
- *
- *	This differs fundamentally from ide_error because in 
- *	this case the command is doing just fine when we
- *	blow it away.
- */
- 
-ide_startstop_t ide_abort(ide_drive_t *drive, const char *msg)
-{
-	struct request *rq;
-
-	if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL)
-		return ide_stopped;
-
-	/* retry only "normal" I/O: */
-	if (!blk_fs_request(rq)) {
-		rq->errors = 1;
-		ide_end_drive_cmd(drive, BUSY_STAT, 0);
-		return ide_stopped;
-	}
-
-	if (rq->rq_disk) {
-		ide_driver_t *drv;
-
-		drv = *(ide_driver_t **)rq->rq_disk->private_data;
-		return drv->abort(drive, rq);
-	} else
-		return __ide_abort(drive, rq);
-}
-
 static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
 {
 	tf->nsect   = drive->sect;
@@ -788,6 +717,18 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
  	return ide_stopped;
 }
 
+static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq)
+{
+	switch (rq->cmd[0]) {
+	case REQ_DRIVE_RESET:
+		return ide_do_reset(drive);
+	default:
+		blk_dump_rq_flags(rq, "ide_special_rq - bad request");
+		ide_end_request(drive, 0, 0);
+		return ide_stopped;
+	}
+}
+
 static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
 {
 	struct request_pm_state *pm = rq->data;
@@ -891,7 +832,16 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
 			    pm->pm_step == ide_pm_state_completed)
 				ide_complete_pm_request(drive, rq);
 			return startstop;
-		}
+		} else if (!rq->rq_disk && blk_special_request(rq))
+			/*
+			 * TODO: Once all ULDs have been modified to
+			 * check for specific op codes rather than
+			 * blindly accepting any special request, the
+			 * check for ->rq_disk above may be replaced
+			 * by a more suitable mechanism or even
+			 * dropped entirely.
+			 */
+			return ide_special_rq(drive, rq);
 
 		drv = *(ide_driver_t **)rq->rq_disk->private_data;
 		return drv->do_request(drive, rq, block);
@@ -1539,88 +1489,30 @@ irqreturn_t ide_intr (int irq, void *dev_id)
 }
 
 /**
- *	ide_init_drive_cmd	-	initialize a drive command request
- *	@rq: request object
- *
- *	Initialize a request before we fill it in and send it down to
- *	ide_do_drive_cmd. Commands must be set up by this function. Right
- *	now it doesn't do a lot, but if that changes abusers will have a
- *	nasty surprise.
- */
-
-void ide_init_drive_cmd (struct request *rq)
-{
-	blk_rq_init(NULL, rq);
-}
-
-EXPORT_SYMBOL(ide_init_drive_cmd);
-
-/**
  *	ide_do_drive_cmd	-	issue IDE special command
  *	@drive: device to issue command
  *	@rq: request to issue
- *	@action: action for processing
  *
  *	This function issues a special IDE device request
  *	onto the request queue.
  *
- *	If action is ide_wait, then the rq is queued at the end of the
- *	request queue, and the function sleeps until it has been processed.
- *	This is for use when invoked from an ioctl handler.
- *
- *	If action is ide_preempt, then the rq is queued at the head of
- *	the request queue, displacing the currently-being-processed
- *	request and this function returns immediately without waiting
- *	for the new rq to be completed.  This is VERY DANGEROUS, and is
- *	intended for careful use by the ATAPI tape/cdrom driver code.
- *
- *	If action is ide_end, then the rq is queued at the end of the
- *	request queue, and the function returns immediately without waiting
- *	for the new rq to be completed. This is again intended for careful
- *	use by the ATAPI tape/cdrom driver code.
+ *	the rq is queued at the head of the request queue, displacing
+ *	the currently-being-processed request and this function
+ *	returns immediately without waiting for the new rq to be
+ *	completed.  This is VERY DANGEROUS, and is intended for
+ *	careful use by the ATAPI tape/cdrom driver code.
  */
- 
-int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action)
+
+void ide_do_drive_cmd(ide_drive_t *drive, struct request *rq)
 {
 	unsigned long flags;
 	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-	DECLARE_COMPLETION_ONSTACK(wait);
-	int where = ELEVATOR_INSERT_BACK, err;
-	int must_wait = (action == ide_wait || action == ide_head_wait);
-
-	rq->errors = 0;
-
-	/*
-	 * we need to hold an extra reference to request for safe inspection
-	 * after completion
-	 */
-	if (must_wait) {
-		rq->ref_count++;
-		rq->end_io_data = &wait;
-		rq->end_io = blk_end_sync_rq;
-	}
 
 	spin_lock_irqsave(&ide_lock, flags);
-	if (action == ide_preempt)
-		hwgroup->rq = NULL;
-	if (action == ide_preempt || action == ide_head_wait) {
-		where = ELEVATOR_INSERT_FRONT;
-		rq->cmd_flags |= REQ_PREEMPT;
-	}
-	__elv_add_request(drive->queue, rq, where, 0);
-	ide_do_request(hwgroup, IDE_NO_IRQ);
+	hwgroup->rq = NULL;
+	__elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 1);
+	__generic_unplug_device(drive->queue);
 	spin_unlock_irqrestore(&ide_lock, flags);
-
-	err = 0;
-	if (must_wait) {
-		wait_for_completion(&wait);
-		if (rq->errors)
-			err = -EIO;
-
-		blk_put_request(rq);
-	}
-
-	return err;
 }
 
 EXPORT_SYMBOL(ide_do_drive_cmd);
@@ -1637,6 +1529,8 @@ void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
 	task.tf.lbah    = (bcount >> 8) & 0xff;
 
 	ide_tf_dump(drive->name, &task.tf);
+	ide_set_irq(drive, 1);
+	SELECT_MASK(drive, 0);
 	drive->hwif->tf_load(drive, &task);
 }