[PATCH RESEND] remove the queue unlock in scsi_requset_fn

[Chanho Min]

We don't need to unlock the queue before put_device in scsi_request_fn()
If we trigger the ->remove() function, It occur a oops from the caller.
So sdev reference count should not be dropped to zero here.
Also It was added before scsi_device_dev_release() was moved
to user context, so it is outdated.

Signed-off-by: Chanho Min <chanho.min@xxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
---
 drivers/scsi/scsi_lib.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index ffd7773..cb2185a 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1626,11 +1626,7 @@ out_delay:
 	if (sdev->device_busy == 0)
 		blk_delay_queue(q, SCSI_QUEUE_DELAY);
 out:
-	/* must be careful here...if we trigger the ->remove() function
-	 * we cannot be holding the q lock */
-	spin_unlock_irq(q->queue_lock);
 	put_device(&sdev->sdev_gendev);
-	spin_lock_irq(q->queue_lock);
 }

 u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
-- 
1.7.0.4
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