openwrtv4/package/mac80211/patches/551-ath9k_sw_retry_reduce.patch

--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -260,14 +260,17 @@ static void ath_tid_drain(struct ath_sof
 }
 
 static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq,
-			     struct sk_buff *skb)
+			     struct sk_buff *skb, int count)
 {
 	struct ath_frame_info *fi = get_frame_info(skb);
 	struct ath_buf *bf = fi->bf;
 	struct ieee80211_hdr *hdr;
+	int prev = fi->retries;
 
 	TX_STAT_INC(txq->axq_qnum, a_retries);
-	if (fi->retries++ > 0)
+	fi->retries += count;
+
+	if (prev > 0)
 		return;
 
 	hdr = (struct ieee80211_hdr *)skb->data;
@@ -383,6 +386,7 @@ static void ath_tx_complete_aggr(struct 
 	int nframes;
 	u8 tidno;
 	bool clear_filter;
+	int i, retries;
 
 	skb = bf->bf_mpdu;
 	hdr = (struct ieee80211_hdr *)skb->data;
@@ -391,6 +395,10 @@ static void ath_tx_complete_aggr(struct 
 
 	memcpy(rates, tx_info->control.rates, sizeof(rates));
 
+	retries = ts->ts_longretry + 1;
+	for (i = 0; i < ts->ts_rateindex; i++)
+		retries += rates[i].count;
+
 	rcu_read_lock();
 
 	sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2);
@@ -478,7 +486,8 @@ static void ath_tx_complete_aggr(struct 
 			} else if (fi->retries < ATH_MAX_SW_RETRIES) {
 				if (!(ts->ts_status & ATH9K_TXERR_FILT) ||
 				    !an->sleeping)
-					ath_tx_set_retry(sc, txq, bf->bf_mpdu);
+					ath_tx_set_retry(sc, txq, bf->bf_mpdu,
+							 retries);
 
 				clear_filter = true;
 				txpending = 1;
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -543,7 +543,7 @@ struct ath_ant_comb {
 #define DEFAULT_CACHELINE       32
 #define ATH_REGCLASSIDS_MAX     10
 #define ATH_CABQ_READY_TIME     80      /* % of beacon interval */
-#define ATH_MAX_SW_RETRIES      10
+#define ATH_MAX_SW_RETRIES      20
 #define ATH_CHAN_MAX            255
 
 #define ATH_TXPOWER_MAX         100     /* .5 dBm units */