ath9k: fix reported signal strength

SVN-Revision: 26368

package/mac80211/patches/560-ath9k_fix_reported_signal_strength.patch

@@ -0,0 +1,27 @@
+--- a/drivers/net/wireless/ath/ath9k/recv.c
++++ b/drivers/net/wireless/ath/ath9k/recv.c
+@@ -957,6 +957,9 @@ static int ath9k_rx_skb_preprocess(struc
+ 				   struct ieee80211_rx_status *rx_status,
+ 				   bool *decrypt_error)
+ {
++	struct ath_hw *ah = common->ah;
++	int noise;
++
+ 	memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
+ 
+ 	/*
+@@ -977,7 +980,13 @@ static int ath9k_rx_skb_preprocess(struc
+ 
+ 	rx_status->band = hw->conf.channel->band;
+ 	rx_status->freq = hw->conf.channel->center_freq;
+-	rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi;
++
++	if (ah->curchan)
++		noise = ah->curchan->noisefloor;
++	else
++		noise = ATH_DEFAULT_NOISE_FLOOR;
++
++	rx_status->signal = noise + rx_stats->rs_rssi;
+ 	rx_status->antenna = rx_stats->rs_antenna;
+ 	rx_status->flag |= RX_FLAG_MACTIME_MPDU;
+