From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 25 May 2011 07:34:04 +0000 (+0000)
Subject: net: hold rtnl again in dump callbacks
X-Git-Tag: v3.0-rc1~147^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2907c35ff64708065e5a7fd54e8ded8263eb3074;p=pandora-kernel.git

net: hold rtnl again in dump callbacks

Commit e67f88dd12f6 (dont hold rtnl mutex during netlink dump callbacks)
missed fact that rtnl_fill_ifinfo() must be called with rtnl held.

Because of possible deadlocks between two mutexes (cb_mutex and rtnl),
its not easy to solve this problem, so revert this part of the patch.

It also forgot one rcu_read_unlock() in FIB dump_rules()

Add one ASSERT_RTNL() in rtnl_fill_ifinfo() to remind us the rule.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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