ath9k_htc: Use proper station add/remove callbacks

sta_add/sta_remove are the callbacks that can sleep.
Use them instead of sta_notify.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -1516,9 +1516,8 @@ static void ath9k_htc_configure_filter(struct ieee80211_hw *hw,
 	mutex_unlock(&priv->mutex);
 }
 
-static void ath9k_htc_sta_notify(struct ieee80211_hw *hw,
+static int ath9k_htc_sta_add(struct ieee80211_hw *hw,
 			     struct ieee80211_vif *vif,
-				 enum sta_notify_cmd cmd,
 			     struct ieee80211_sta *sta)
 {
 	struct ath9k_htc_priv *priv = hw->priv;
@@ -1526,22 +1525,29 @@ static void ath9k_htc_sta_notify(struct ieee80211_hw *hw,
 
 	mutex_lock(&priv->mutex);
 	ath9k_htc_ps_wakeup(priv);
-
-	switch (cmd) {
-	case STA_NOTIFY_ADD:
 	ret = ath9k_htc_add_station(priv, vif, sta);
 	if (!ret)
 		ath9k_htc_init_rate(priv, sta);
-		break;
-	case STA_NOTIFY_REMOVE:
-		ath9k_htc_remove_station(priv, vif, sta);
-		break;
-	default:
-		break;
-	}
+	ath9k_htc_ps_restore(priv);
+	mutex_unlock(&priv->mutex);
+
+	return ret;
+}
 
+static int ath9k_htc_sta_remove(struct ieee80211_hw *hw,
+				struct ieee80211_vif *vif,
+				struct ieee80211_sta *sta)
+{
+	struct ath9k_htc_priv *priv = hw->priv;
+	int ret;
+
+	mutex_lock(&priv->mutex);
+	ath9k_htc_ps_wakeup(priv);
+	ret = ath9k_htc_remove_station(priv, vif, sta);
 	ath9k_htc_ps_restore(priv);
 	mutex_unlock(&priv->mutex);
+
+	return ret;
 }
 
 static int ath9k_htc_conf_tx(struct ieee80211_hw *hw, u16 queue,
@@ -1849,7 +1855,8 @@ struct ieee80211_ops ath9k_htc_ops = {
 	.remove_interface   = ath9k_htc_remove_interface,
 	.config             = ath9k_htc_config,
 	.configure_filter   = ath9k_htc_configure_filter,
-	.sta_notify         = ath9k_htc_sta_notify,
+	.sta_add            = ath9k_htc_sta_add,
+	.sta_remove         = ath9k_htc_sta_remove,
 	.conf_tx            = ath9k_htc_conf_tx,
 	.bss_info_changed   = ath9k_htc_bss_info_changed,
 	.set_key            = ath9k_htc_set_key,