From: Jens Axboe <axboe@fb.com>
Date: Sat, 20 Jun 2015 16:26:50 +0000 (-0600)
Subject: cfq-iosched: fix other locations where blkcg_to_cfqgd() can return NULL
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~120^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae994ea972473c0ace9d55f718b60f0727af1381;p=pandora-kernel.git

cfq-iosched: fix other locations where blkcg_to_cfqgd() can return NULL

Commit 9470e4a693db only covered the initial bug report, there are
other spots in CFQ where we need to check that we actually have
a valid cfq_group_data structure.

Fixes: e48453c3 ("block, cgroup: implement policy-specific per-blkcg data")
Signed-off-by: Jens Axboe <axboe@fb.com>
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