ath9k_htc: Handle monitor mode properly for HTC devices

No need to inform about monitor interface changes to
firmware. Set the HW mode to monitor type based on mac80211
indication flag is sufficient.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -184,47 +184,6 @@ static int ath9k_htc_set_channel(struct ath9k_htc_priv *priv,
 	return ret;
 }
 
-static int ath9k_htc_add_monitor_interface(struct ath9k_htc_priv *priv)
-{
-	struct ath_common *common = ath9k_hw_common(priv->ah);
-	struct ath9k_htc_target_vif hvif;
-	int ret = 0;
-	u8 cmd_rsp;
-
-	if (priv->nvifs > 0)
-		return -ENOBUFS;
-
-	memset(&hvif, 0, sizeof(struct ath9k_htc_target_vif));
-	memcpy(&hvif.myaddr, common->macaddr, ETH_ALEN);
-
-	hvif.opmode = cpu_to_be32(HTC_M_MONITOR);
-	priv->ah->opmode = NL80211_IFTYPE_MONITOR;
-	hvif.index = priv->nvifs;
-
-	WMI_CMD_BUF(WMI_VAP_CREATE_CMDID, &hvif);
-	if (ret)
-		return ret;
-
-	priv->nvifs++;
-	return 0;
-}
-
-static int ath9k_htc_remove_monitor_interface(struct ath9k_htc_priv *priv)
-{
-	struct ath_common *common = ath9k_hw_common(priv->ah);
-	struct ath9k_htc_target_vif hvif;
-	int ret = 0;
-	u8 cmd_rsp;
-
-	memset(&hvif, 0, sizeof(struct ath9k_htc_target_vif));
-	memcpy(&hvif.myaddr, common->macaddr, ETH_ALEN);
-	hvif.index = 0; /* Should do for now */
-	WMI_CMD_BUF(WMI_VAP_REMOVE_CMDID, &hvif);
-	priv->nvifs--;
-
-	return ret;
-}
-
 static int ath9k_htc_add_station(struct ath9k_htc_priv *priv,
 				 struct ieee80211_vif *vif,
 				 struct ieee80211_sta *sta)
@@ -1240,16 +1199,6 @@ static void ath9k_htc_stop(struct ieee80211_hw *hw)
 	WMI_CMD(WMI_STOP_RECV_CMDID);
 	skb_queue_purge(&priv->tx_queue);
 
-	/* Remove monitor interface here */
-	if (ah->opmode == NL80211_IFTYPE_MONITOR) {
-		if (ath9k_htc_remove_monitor_interface(priv))
-			ath_print(common, ATH_DBG_FATAL,
-				  "Unable to remove monitor interface\n");
-		else
-			ath_print(common, ATH_DBG_CONFIG,
-				  "Monitor interface removed\n");
-	}
-
 	if (ah->btcoex_hw.enabled) {
 		ath9k_hw_btcoex_disable(ah);
 		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
@@ -1423,16 +1372,13 @@ static int ath9k_htc_config(struct ieee80211_hw *hw, u32 changed)
 		}
 	}
 
-	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
+	if (changed & IEEE80211_CONF_CHANGE_MONITOR)
 		if (conf->flags & IEEE80211_CONF_MONITOR) {
-			if (ath9k_htc_add_monitor_interface(priv))
-				ath_print(common, ATH_DBG_FATAL,
-					  "Failed to set monitor mode\n");
-			else
 			ath_print(common, ATH_DBG_CONFIG,
 				  "HW opmode set to Monitor mode\n");
+			priv->ah->opmode = NL80211_IFTYPE_MONITOR;
 		}
-	}
+
 
 	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 		mutex_lock(&priv->htc_pm_lock);