[BRIDGE]: Fix rmmod race.

Fix observed race between removing bridge module and ip packets
in flight.  Need to remove the hook last, after all bridges are gone
not the other way around.

diff --git a/net/bridge/br.c b/net/bridge/br.c
index e5f6c19236f40cb994fa93b5b3ba8cb65bfec16b..2f02b889c496035099f27caae2070046b0db3a01 100644 (file)
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -54,16 +54,17 @@ static void __exit br_deinit(void)
 #endif
        unregister_netdevice_notifier(&br_device_notifier);
        brioctl_set(NULL);
-       br_handle_frame_hook = NULL;
+
+       br_cleanup_bridges();
+
+       synchronize_net();
 
 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
        br_fdb_get_hook = NULL;
        br_fdb_put_hook = NULL;
 #endif
 
-       br_cleanup_bridges();
-
-       synchronize_net();
+       br_handle_frame_hook = NULL;
 }
 
 EXPORT_SYMBOL(br_should_route_hook);