tree a881c5b85b07525f28cc546dfde2038cd900cb45
parent 6548b0e5b875a07e32e924b22a7df3669892c75a
author Muthukumar Ratty <muthur@gmail.com> 1340983909 +0000
committer James Bottomley <JBottomley@Parallels.com> 1342771119 +0100

[SCSI] block: Fix blk_execute_rq_nowait() dead queue handling

If the queue is dead blk_execute_rq_nowait() doesn't invoke the done()
callback function. That will result in blk_execute_rq() being stuck
in wait_for_completion(). Avoid this by initializing rq->end_io to the
done() callback before we check the queue state. Also, make sure the
queue lock is held around the invocation of the done() callback. Found
this through source code review.

Signed-off-by: Muthukumar Ratty <muthur@gmail.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Tejun Heo <tj@kernel.org>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>