ath9k: cancel all workqueue activity when going idle

Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/main.c

@@ -1595,8 +1595,11 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
 	 * of the changes. Likewise we must only disable the radio towards
 	 * the end.
 	 */
-	if (changed & IEEE80211_CONF_CHANGE_IDLE)
+	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 		sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
+		if (sc->ps_idle)
+			ath_cancel_work(sc);
+	}
 
 	/*
 	 * We just prepare to enable PS. We have to wait until our AP has