From: Joe Lawrence <joe.lawrence@stratus.com>
Date: Wed, 2 Jul 2014 19:35:16 +0000 (-0400)
Subject: block,scsi: verify return pointer from blk_get_request
X-Git-Tag: fixes-against-v3.18-rc2~52^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb571eeade2598635f813b3284d02c13a380301e;p=pandora-kernel.git

block,scsi: verify return pointer from blk_get_request

The blk-core dead queue checks introduce an error scenario to
blk_get_request that returns NULL if the request queue has been
shutdown. This affects the behavior for __GFP_WAIT callers, who should
verify the return value before dereferencing.

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Jiri Kosina <jkosina@suse.cz> [for pktdvd]
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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