From adaaa0c6ab89e82684389b80002bce893179cf2c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Linus=20L=C3=BCssing?= <linus.luessing@web.de>
Date: Fri, 7 May 2010 21:47:06 +0200
Subject: [PATCH] Staging: batman-adv: only modify hna-table on active module
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If we haven't set the module to MODULE_ACTIVE state before (in general,
no interface has yet been added to batman-adv) then the hna table is not
initialised yet. If the kernel changes the mac address of the bat0
interface at this moment then an hna_local_add() called by interface_set_mac_addr()
then resulted in a null pointer derefernce. With this patch we are now
explicitly checking before if the state is MODULE_ACTIVE right now so
that we can assume having an initialised hna table.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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