[Bridge] [PATCH net-next] bridge: avoid br_ifinfo_notify when nothing changed

[David Miller]

From: Hong Zhiguo <honkiko at gmail.com>
Date: Sun, 24 Mar 2013 21:26:47 +0800

> 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 at gmail.com>

Applied.