From 2b31594a9523449b168946725689d039c80204de Mon Sep 17 00:00:00 2001
From: Jonghwan Choi <jhbird.choi@samsung.com>
Date: Sat, 14 Jan 2012 11:06:03 +0900
Subject: [PATCH] driver-core: Fix possible null reference in
 subsys_interface_unregister

Check if the sif is not NULL before de-referencing it

Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Reading git-format-patch failed