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[SCSI] scsi_dh_alua: fix deadlock in stpg_endio 

The use of blk_execute_rq_nowait() implies __blk_put_request() is needed
in stpg_endio() rather than blk_put_request() -- blk_finish_request() is
called with queue lock already held.

Signed-off-by: Joseph Gruher <joseph.r.gruher@intel.com>
Signed-off-by: Ilgu Hong <ilgu.hong@promise.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Joseph Gruher 2011-01-05 16:00:21 -05:00 committed by James Bottomley
parent 7c66e9a5e6
commit ed0f36bc57
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/device_handler/scsi_dh_alua.c
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@ -285,7 +285,8 @@ static void stpg_endio(struct request *req, int error)
print_alua_state(h->state));
}
done:
blk_put_request(req);
req->end_io_data = NULL;
__blk_put_request(req->q, req);
if (h->callback_fn) {
h->callback_fn(h->callback_data, err);
h->callback_fn = h->callback_data = NULL;