scsi: centralize command re-queueing in scsi_dispatch_fn
Make sure we only have the logic for requeing commands in one place.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Webb Scales <webbnh@hp.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Tested-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Robert Elliott <elliott@hp.com>
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 3ac677c..bf73427 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1557,9 +1557,12 @@
* Dispatch the command to the low-level driver.
*/
rtn = scsi_dispatch_cmd(cmd);
- spin_lock_irq(q->queue_lock);
- if (rtn)
+ if (rtn) {
+ scsi_queue_insert(cmd, rtn);
+ spin_lock_irq(q->queue_lock);
goto out_delay;
+ }
+ spin_lock_irq(q->queue_lock);
}
return;
@@ -1579,7 +1582,7 @@
blk_requeue_request(q, req);
sdev->device_busy--;
out_delay:
- if (sdev->device_busy == 0)
+ if (sdev->device_busy == 0 && !scsi_device_blocked(sdev))
blk_delay_queue(q, SCSI_QUEUE_DELAY);
}