From: Pavel Emelyanov <xemul@openvz.org>
Date: Mon, 5 May 2008 00:59:30 +0000 (-0700)
Subject: mac80211: Do not free net device after it is unregistered.
X-Git-Tag: v2.6.26-rc2~60^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=339a7c41c913035bf58579f6e47b4ba29da83795;p=pandora-kernel.git

mac80211: Do not free net device after it is unregistered.

The error path in ieee80211_register_hw() may call the unregister_netdev()
and right after it - the free_netdev(), which is wrong, since the
unregister releases the device itself.

So the proposed fix is to NULL the local->mdev after unregister is done
and check this before calling free_netdev().

I checked - no code uses the local->mdev after unregister in this error
path (but even if some did this would be a BUG).

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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