wl1271: Remove circular interlocking related to the inetaddr notifier chain
authorJuuso Oikarinen <juuso.oikarinen@nokia.com>
Thu, 18 Mar 2010 10:26:45 +0000 (12:26 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 23 Mar 2010 20:50:25 +0000 (16:50 -0400)
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>
drivers/net/wireless/wl12xx/wl1271_main.c

index 6f6d366491a3b443fd2a566c5ac692fbe65c62cd..0bebc456ec0de6cb35edcf85cda646cf58b45a63 100644 (file)
@@ -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);