ath9k: Fill in ack signal in TX status

This patch fills the ack_signal field in TX status with an appropriate
value from the TX descriptor.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath9k/xmit.c

@@ -1852,13 +1852,17 @@ static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
 	return nbad;
 }
 
-static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, int nbad)
+static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds,
+			     int nbad, int txok)
 {
 	struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 
+	if (txok)
+		tx_info->status.ack_signal = ds->ds_txstat.ts_rssi;
+
 	tx_info_priv->update_rc = false;
 	if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT)
 		tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
@@ -1996,7 +2000,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
 			nbad = ath_tx_num_badfrms(sc, bf, txok);
 		}
 
-		ath_tx_rc_status(bf, ds, nbad);
+		ath_tx_rc_status(bf, ds, nbad, txok);
 
 		if (bf_isampdu(bf))
 			ath_tx_complete_aggr(sc, txq, bf, &bf_head, txok);