Merge upstream (approx. 2.6.12-git8) into 'janitor' branch of netdev-2.6.

1 files changed, 24 insertions, 18 deletions

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index d18da21c9c57..621dee8b8cb2 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -44,7 +44,7 @@ struct scsi_host_sg_pool {
 #endif
 
 #define SP(x) { x, "sgpool-" #x } 
-struct scsi_host_sg_pool scsi_sg_pools[] = { 
+static struct scsi_host_sg_pool scsi_sg_pools[] = {
 	SP(8),
 	SP(16),
 	SP(32),
@@ -92,10 +92,12 @@ int scsi_insert_special_req(struct scsi_request *sreq, int at_head)
 	 */
 	sreq->sr_request->flags &= ~REQ_DONTPREP;
 	blk_insert_request(sreq->sr_device->request_queue, sreq->sr_request,
-		       	   at_head, sreq, 0);
+		       	   at_head, sreq);
 	return 0;
 }
 
+static void scsi_run_queue(struct request_queue *q);
+
 /*
  * Function:    scsi_queue_insert()
  *
@@ -119,18 +121,14 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
 {
 	struct Scsi_Host *host = cmd->device->host;
 	struct scsi_device *device = cmd->device;
+	struct request_queue *q = device->request_queue;
+	unsigned long flags;
 
 	SCSI_LOG_MLQUEUE(1,
 		 printk("Inserting command %p into mlqueue\n", cmd));
 
 	/*
-	 * We are inserting the command into the ml queue.  First, we
-	 * cancel the timer, so it doesn't time out.
-	 */
-	scsi_delete_timer(cmd);
-
-	/*
-	 * Next, set the appropriate busy bit for the device/host.
+	 * Set the appropriate busy bit for the device/host.
 	 *
 	 * If the host/device isn't busy, assume that something actually
 	 * completed, and that we should be able to queue a command now.
@@ -160,17 +158,22 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
 	scsi_device_unbusy(device);
 
 	/*
-	 * Insert this command at the head of the queue for it's device.
-	 * It will go before all other commands that are already in the queue.
+	 * Requeue this command.  It will go before all other commands
+	 * that are already in the queue.
 	 *
 	 * NOTE: there is magic here about the way the queue is plugged if
 	 * we have no outstanding commands.
 	 * 
-	 * Although this *doesn't* plug the queue, it does call the request
+	 * Although we *don't* plug the queue, we call the request
 	 * function.  The SCSI request function detects the blocked condition
 	 * and plugs the queue appropriately.
-	 */
-	blk_insert_request(device->request_queue, cmd->request, 1, cmd, 1);
+         */
+	spin_lock_irqsave(q->queue_lock, flags);
+	blk_requeue_request(q, cmd->request);
+	spin_unlock_irqrestore(q->queue_lock, flags);
+
+	scsi_run_queue(q);
+
 	return 0;
 }
 
@@ -485,8 +488,13 @@ static void scsi_run_queue(struct request_queue *q)
  */
 static void scsi_requeue_command(struct request_queue *q, struct scsi_cmnd *cmd)
 {
+	unsigned long flags;
+
 	cmd->request->flags &= ~REQ_DONTPREP;
-	blk_insert_request(q, cmd->request, 1, cmd, 1);
+
+	spin_lock_irqsave(q->queue_lock, flags);
+	blk_requeue_request(q, cmd->request);
+	spin_unlock_irqrestore(q->queue_lock, flags);
 
 	scsi_run_queue(q);
 }
@@ -941,10 +949,8 @@ static int scsi_init_io(struct scsi_cmnd *cmd)
 	 * if sg table allocation fails, requeue request later.
 	 */
 	sgpnt = scsi_alloc_sgtable(cmd, GFP_ATOMIC);
-	if (unlikely(!sgpnt)) {
-		req->flags |= REQ_SPECIAL;
+	if (unlikely(!sgpnt))
 		return BLKPREP_DEFER;
-	}
 
 	cmd->request_buffer = (char *) sgpnt;
 	cmd->request_bufflen = req->nr_sectors << 9;