From: Ying Xue <ying.xue@windriver.com>
Date: Wed, 15 Jan 2014 02:23:40 +0000 (+0800)
Subject: decnet: use __dev_get_by_index instead of dev_get_by_index to find interface
X-Git-Tag: v3.14-rc1~94^2~179^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4c5fba2f6c272ed687fe6351e5b20bc60cf24f0;p=pandora-kernel.git

decnet: use __dev_get_by_index instead of dev_get_by_index to find interface

The following call chain we can identify that dn_cache_getroute() is
protected under rtnl_lock. So if we use __dev_get_by_index() instead
of dev_get_by_index() to find interface handlers in it, this would help
us avoid to change interface reference counter.

rtnetlink_rcv()
  rtnl_lock()
    netlink_rcv_skb()
      dn_cache_getroute()
  rtnl_unlock()

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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