1 files changed, 23 insertions, 17 deletions

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index d18da21c9c57..9f996499fa9d 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -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;