[SCSI] fix oops in scsi_release_buffers()

I found one other thing that needs to be fixed.  The call to
scsi_release_buffers in scsi_unprep_request causes an oops, because the
sgtable has already been freed in scsi_io_completion.  The following patch
is needed.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 0c6924eecf59e6a34b34dd46479feb9ba7ed3aac..f065cbc1a6e54bcbe81649a201d75cb4707aa671 100644 (file)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -118,7 +118,6 @@ static void scsi_unprep_request(struct request *req)
        req->flags &= ~REQ_DONTPREP;
        req->special = (req->flags & REQ_SPECIAL) ? cmd->sc_request : NULL;
 
-       scsi_release_buffers(cmd);
        scsi_put_command(cmd);
 }
 
@@ -1512,7 +1511,6 @@ static void scsi_request_fn(struct request_queue *q)
         * cases (host limits or settings) should run the queue at some
         * later time.
         */
-       scsi_unprep_request(req);
        spin_lock_irq(q->queue_lock);
        blk_requeue_request(q, req);
        sdev->device_busy--;