From: Brian Norris <computersforpeace@gmail.com>
Date: Wed, 26 Feb 2014 02:27:40 +0000 (-0800)
Subject: jffs2: fix unbalanced locking
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~143^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7aaea7605c0e19fa7b38d7ac5dcd818942fd17a7;p=pandora-kernel.git

jffs2: fix unbalanced locking

Li Zefan reported an unbalanced locking issue, found by his
internal debugging feature on runtime. The particular case he was
looking at doesn't lead to a deadlock, as the structure that this lock
is embedded in is freed on error. But we should straighten out the error
handling.

Because several callers of jffs2_do_read_inode_internal() /
jffs2_do_read_inode() already handle the locking/unlocking and inode
clearing at their own level, let's just push any unlocks/clearing down
to the caller. This consistency is much easier to verify.

Reported-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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