blkcg: fix gendisk reference leak in blkg_conf_prep()
authorTejun Heo <tj@kernel.org>
Wed, 22 Jul 2015 22:05:53 +0000 (18:05 -0400)
committerJens Axboe <axboe@fb.com>
Wed, 22 Jul 2015 22:06:53 +0000 (16:06 -0600)
commit5f6c2d2b7dbb541c1e922538c49fa04c494ae3d7
treee248b438d0302d71700c38cc5dfa40d85f81b76b
parent21974061cfb3c4b0b1a83447fb5e7cdcd06e56dc
blkcg: fix gendisk reference leak in blkg_conf_prep()

When a blkcg configuration is targeted to a partition rather than a
whole device, blkg_conf_prep fails with -EINVAL; unfortunately, it
forgets to put the gendisk ref in that case.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
block/blk-cgroup.c