tree ef9c696d9d73f34f75c3470c0a1997964b2256eb
parent e340a90e6e07bba6e6b3fc39dd5fa76f95579d7c
author Pavel Emelyanov <xemul@openvz.org> 1209949170 -0700
committer David S. Miller <davem@davemloft.net> 1209949170 -0700

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>