rt2x00: Reset antenna RSSI after switch

When the antenna configuration has changed we should reset
the antenna RSSI value. Otherwise the value will be influenced
by the previous configuration quality which in turn will affect
the antenna diversity.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00.h

@@ -328,6 +328,11 @@ static inline int rt2x00_get_link_ant_rssi(struct link *link)
 	return DEFAULT_RSSI;
 }
 
+static inline void rt2x00_reset_link_ant_rssi(struct link *link)
+{
+	link->ant.rssi_ant = 0;
+}
+
 static inline int rt2x00_get_link_ant_rssi_history(struct link *link,
 						   enum antenna ant)
 {

drivers/net/wireless/rt2x00/rt2x00config.c

@@ -129,6 +129,7 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 	 */
 	rt2x00dev->ops->lib->config(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
 	rt2x00lib_reset_link_tuner(rt2x00dev);
+	rt2x00_reset_link_ant_rssi(&rt2x00dev->link);
 
 	rt2x00dev->link.ant.active.rx = libconf.ant.rx;
 	rt2x00dev->link.ant.active.tx = libconf.ant.tx;