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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>
This commit is contained in:
Juuso Oikarinen 2010-03-18 12:26:45 +02:00 committed by John W. Linville
parent a0cb7be4f4
commit 2ea9fb3d79
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/wl12xx/wl1271_main.c
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@ -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);