rtlwifi: Add missing code to PWDB statics routine

commit d82403a9 upstream.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/wireless/rtlwifi/stats.c

@@ -176,6 +176,7 @@ static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
 	struct rtl_sta_info *drv_priv = NULL;
 	struct ieee80211_sta *sta = NULL;
 	long undec_sm_pwdb;
+	long undec_sm_cck;
 
 	rcu_read_lock();
 	if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
@@ -185,12 +186,16 @@ static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
 	if (sta) {
 		drv_priv = (struct rtl_sta_info *) sta->drv_priv;
 		undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb;
+		undec_sm_cck = drv_priv->rssi_stat.undec_sm_cck;
 	} else {
 		undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
+		undec_sm_cck = rtlpriv->dm.undec_sm_cck;
 	}
 
 	if (undec_sm_pwdb < 0)
 		undec_sm_pwdb = pstatus->rx_pwdb_all;
+	if (undec_sm_cck < 0)
+		undec_sm_cck = pstatus->rx_pwdb_all;
 	if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) {
 		undec_sm_pwdb = (((undec_sm_pwdb) *
 		      (RX_SMOOTH_FACTOR - 1)) +
@@ -200,6 +205,15 @@ static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
 		undec_sm_pwdb = (((undec_sm_pwdb) * (RX_SMOOTH_FACTOR - 1)) +
 		     (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
 	}
+	if (pstatus->rx_pwdb_all > (u32) undec_sm_cck) {
+		undec_sm_cck = (((undec_sm_pwdb) *
+		      (RX_SMOOTH_FACTOR - 1)) +
+		     (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
+		undec_sm_cck = undec_sm_cck + 1;
+	} else {
+		undec_sm_pwdb = (((undec_sm_cck) * (RX_SMOOTH_FACTOR - 1)) +
+		     (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
+	}
 
 	if (sta) {
 		drv_priv->rssi_stat.undec_sm_pwdb = undec_sm_pwdb;