From: Jeff Moyer <jmoyer@redhat.com>
Date: Tue, 3 Dec 2013 21:23:00 +0000 (-0700)
Subject: blk-mq: fix dereference of rq->mq_ctx if allocation fails
X-Git-Tag: v3.13-rc3~8^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=959a35f13eb785f982d79b1aaa75872d05c821da;p=pandora-kernel.git

blk-mq: fix dereference of rq->mq_ctx if allocation fails

If __GFP_WAIT isn't set and we fail allocating, when we go
to drop the reference on the ctx, we will attempt to dereference
the NULL rq. Fix that.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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