From 7b99a99390ca328f4678ac04358c94744ab0f8b4 Mon Sep 17 00:00:00 2001
From: Hong zhi guo <honkiko@gmail.com>
Date: Sun, 24 Mar 2013 03:26:47 +0000
Subject: [PATCH] bridge: avoid br_ifinfo_notify when nothing changed

When neither IFF_BRIDGE nor IFF_BRIDGE_PORT is set,
and afspec == NULL but  protinfo != NULL, we run into
"if (err == 0) br_ifinfo_notify(RTM_NEWLINK, p);" with
random value in ret.

Thanks to Sergei for pointing out the error in commit comments.

Signed-off-by: Hong Zhiguo <honkiko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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