openwrtv3/package/mac80211/patches/571-ath9k_send_bar_fix.patch

--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -275,7 +275,6 @@ struct ath_tx_control {
 
 #define ATH_TX_ERROR        0x01
 #define ATH_TX_XRETRY       0x02
-#define ATH_TX_BAR          0x04
 
 /**
  * @txq_map:  Index is mac80211 queue number.  This is
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1801,6 +1801,7 @@ static int ath9k_sta_add(struct ieee8021
 	struct ieee80211_key_conf ps_key = { };
 
 	ath_node_attach(sc, sta);
+	an->vif = vif;
 
 	if (vif->type != NL80211_IFTYPE_AP &&
 	    vif->type != NL80211_IFTYPE_AP_VLAN)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -51,7 +51,7 @@ static void ath_tx_send_normal(struct at
 			       struct list_head *bf_head);
 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
 				struct ath_txq *txq, struct list_head *bf_q,
-				struct ath_tx_status *ts, int txok, int sendbar);
+				struct ath_tx_status *ts, int txok);
 static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
 			     struct list_head *head, bool internal);
 static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len);
@@ -166,7 +166,7 @@ static void ath_tx_flush_tid(struct ath_
 		fi = get_frame_info(bf->bf_mpdu);
 		if (fi->retries) {
 			ath_tx_update_baw(sc, tid, fi->seqno);
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 1);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 		} else {
 			ath_tx_send_normal(sc, txq, NULL, &bf_head);
 		}
@@ -238,7 +238,7 @@ static void ath_tid_drain(struct ath_sof
 			ath_tx_update_baw(sc, tid, fi->seqno);
 
 		spin_unlock(&txq->axq_lock);
-		ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
+		ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 		spin_lock(&txq->axq_lock);
 	}
 
@@ -381,8 +381,7 @@ static void ath_tx_complete_aggr(struct 
 				list_move_tail(&bf->list, &bf_head);
 
 			ath_tx_rc_status(sc, bf, ts, 1, 1, 0, false);
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts,
-				0, 0);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0);
 
 			bf = bf_next;
 		}
@@ -426,7 +425,7 @@ static void ath_tx_complete_aggr(struct 
 
 	ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad);
 	while (bf) {
-		txfail = txpending = sendbar = 0;
+		txfail = txpending = 0;
 		bf_next = bf->bf_next;
 
 		skb = bf->bf_mpdu;
@@ -489,7 +488,7 @@ static void ath_tx_complete_aggr(struct 
 			}
 
 			ath_tx_complete_buf(sc, bf, txq, &bf_head, ts,
-				!txfail, sendbar);
+				!txfail);
 		} else {
 			/* retry the un-acked ones */
 			ath9k_hw_set_clrdmask(sc->sc_ah, bf->bf_desc, false);
@@ -514,7 +513,7 @@ static void ath_tx_complete_aggr(struct 
 								nbad, 0, false);
 						ath_tx_complete_buf(sc, bf, txq,
 								    &bf_head,
-								    ts, 0, 0);
+								    ts, 0);
 						break;
 					}
 
@@ -564,6 +563,9 @@ static void ath_tx_complete_aggr(struct 
 		}
 	}
 
+	if (sendbar || (tid->state & AGGR_CLEANUP))
+		ieee80211_send_bar(an->vif, sta->addr, tidno, tid->seq_start << 4);
+
 	rcu_read_unlock();
 
 	if (needreset)
@@ -900,6 +902,7 @@ void ath_tx_aggr_stop(struct ath_softc *
 	spin_unlock_bh(&txq->axq_lock);
 
 	ath_tx_flush_tid(sc, txtid);
+	ieee80211_send_bar(an->vif, sta->addr, tid, txtid->seq_start << 4);
 }
 
 bool ath_tx_aggr_sleep(struct ath_softc *sc, struct ath_node *an)
@@ -1178,7 +1181,7 @@ static void ath_drain_txq_list(struct at
 			ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0,
 					     retry_tx);
 		else
-			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
+			ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
 		spin_lock_bh(&txq->axq_lock);
 	}
 }
@@ -1885,9 +1888,6 @@ static void ath_tx_complete(struct ath_s
 
 	ath_dbg(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
 
-	if (tx_flags & ATH_TX_BAR)
-		tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
-
 	if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) {
 		/* Frame was ACKed */
 		tx_info->flags |= IEEE80211_TX_STAT_ACK;
@@ -1932,15 +1932,12 @@ static void ath_tx_complete(struct ath_s
 
 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
 				struct ath_txq *txq, struct list_head *bf_q,
-				struct ath_tx_status *ts, int txok, int sendbar)
+				struct ath_tx_status *ts, int txok)
 {
 	struct sk_buff *skb = bf->bf_mpdu;
 	unsigned long flags;
 	int tx_flags = 0;
 
-	if (sendbar)
-		tx_flags = ATH_TX_BAR;
-
 	if (!txok) {
 		tx_flags |= ATH_TX_ERROR;
 
@@ -2056,7 +2053,7 @@ static void ath_tx_process_buffer(struct
 		if (ts->ts_status & ATH9K_TXERR_XRETRY)
 			bf->bf_state.bf_type |= BUF_XRETRY;
 		ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok, true);
-		ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok, 0);
+		ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok);
 	} else
 		ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok, true);