From: Akria Fujita <a-fujita@rs.jp.nec.com>
Date: Sat, 2 Feb 2013 01:52:46 +0000 (-0500)
Subject: ext4: fix smatch warning in move_extent.c's mext_replace_branches()
X-Git-Tag: v3.9-rc1~64^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87e698734b9e618276c797092ccdd91da292d10e;p=pandora-kernel.git

ext4: fix smatch warning in move_extent.c's mext_replace_branches()

Commit 2147b1a6a48 resulted in a new smatch warning:

> fs/ext4/move_extent.c:693 mext_replace_branches()
> 	 warn: variable dereferenced before check 'dext' (see line 683)

Fix this by adding a check to make sure dext is non-NULL before we
derefrence it.

Signed-off-by: Akria Fujita <a-fujita@rs.jp.nec.com>
[ modified by tytso to make sure an ext4_error is called ]
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

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