wl1271: Remove circular interlocking related to the inetaddr notifier chain

Removing the wl1271 from the inet addr notifier chain sometimes causes the
registered handler to be called - causing locking problems if the removing
function is called from within the mutex.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c
index 6f6d366..0bebc45 100644 (file)
--- a/drivers/net/wireless/wl12xx/wl1271_main.c
+++ b/drivers/net/wireless/wl12xx/wl1271_main.c
@@ -1029,12 +1029,13 @@ static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
        struct wl1271 *wl = hw->priv;
        int i;
 
+       unregister_inetaddr_notifier(&wl1271_dev_notifier);
+
        mutex_lock(&wl->mutex);
        wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
 
        wl1271_info("down");
 
-       unregister_inetaddr_notifier(&wl1271_dev_notifier);
        list_del(&wl->list);
 
        WARN_ON(wl->state != WL1271_STATE_ON);