From 1fb1754a8c70d69ab480763c423e0a74369c4a67 Mon Sep 17 00:00:00 2001
From: Hong Zhiguo <zhiguohong@tencent.com>
Date: Sat, 14 Sep 2013 22:42:27 +0800
Subject: [PATCH] bridge: use br_port_get_rtnl within rtnl lock

current br_port_get_rcu is problematic in bridging path
(NULL deref). Change these calls in netlink path first.

Signed-off-by: Hong Zhiguo <zhiguohong@tencent.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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