From: Antonio Quartulli <ordex@autistici.org>
Date: Fri, 19 Apr 2013 09:04:52 +0000 (+0200)
Subject: batman-adv: fix global protection fault during soft_iface destruction
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~65^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c501345ce24983d234fc913e7e81b6abe59cb54;p=pandora-kernel.git

batman-adv: fix global protection fault during soft_iface destruction

batadv_mesh_free() schedules some RCU callbacks which need the bat_priv struct
to do their jobs, while free_netdev(), which is called immediately after, is
destroying the private data.

Put an rcu_barrier() in the middle so that free_netdev() is invoked only after
all the callbacks returned.

This bug has been introduced by ab8f433dd39be94e8617cff2dfe9f7eca162eb15
("batman-adv: Move deinitialization of soft-interface to destructor")

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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