From: Tejun Heo <tj@kernel.org>
Date: Tue, 14 May 2013 20:52:30 +0000 (-0700)
Subject: blkcg: fix error return path in blkg_create()
X-Git-Tag: v3.11-rc1~21^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2423c9c3f0ffffa8f87cbdafe9781273c5d1b6a2;p=pandora-kernel.git

blkcg: fix error return path in blkg_create()

In blkg_create(), after lookup of parent fails, the control jumps to
error path with the error code encoded into @blkg.  The error path
doesn't use @blkg for the return value.  It returns ERR_PTR(ret).
Make lookup fail path set @ret instead of @blkg.

Note that the parent lookup is guaranteed to succeed at that point and
the condition check is purely for sanity and triggers WARN when fails.
As such, I don't think it's necessary to mark it for -stable.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
---

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