From: Jan Kara <jack@suse.cz>
Date: Thu, 12 Nov 2009 14:42:08 +0000 (+0100)
Subject: quota: Fix WARN_ON in lookup_one_len
X-Git-Tag: v2.6.33-rc1~311^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c56818d7dc976a7392be82e8e04fe26347d591f3;p=pandora-kernel.git

quota: Fix WARN_ON in lookup_one_len

We should hold i_mutex when looking up quota files for journaled quotas,
otherwise a WARN_ON in lookup_one_len triggers. The fact that we didn't
hold i_mutex previously probably could not lead to a real bug since the
filesystem is just being mounted / remounted read-write and thus the
root directory cannot change anyway but it's definitely cleaner with
i_mutex.

Reported-by: Bastien ROUCARIES <roucaries.bastien@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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