1 files changed, 111 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/343-ath9k-fix-block-ack-window-tracking-issues.patch b/package/kernel/mac80211/patches/343-ath9k-fix-block-ack-window-tracking-issues.patch
new file mode 100644
index 0000000000..007a8d7d62
--- /dev/null
+++ b/package/kernel/mac80211/patches/343-ath9k-fix-block-ack-window-tracking-issues.patch
@@ -0,0 +1,111 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Tue, 30 Aug 2016 12:44:08 +0200
+Subject: [PATCH] ath9k: fix block-ack window tracking issues
+
+Ensure that a buffer gets tracked as part of the block-ack window as
+soon as it's dequeued from the tid for the first time. Ensure that
+double calls to ath_tx_addto_baw (e.g. on retransmission) don't cause
+any issues.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -62,7 +62,7 @@ static void ath_tx_rc_status(struct ath_
+ 			     struct ath_tx_status *ts, int nframes, int nbad,
+ 			     int txok);
+ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
+-			      int seqno);
++			      struct ath_buf *bf);
+ static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
+ 					   struct ath_txq *txq,
+ 					   struct ath_atx_tid *tid,
+@@ -300,7 +300,7 @@ static void ath_tx_flush_tid(struct ath_
+ 		}
+ 
+ 		if (fi->baw_tracked) {
+-			ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
++			ath_tx_update_baw(sc, tid, bf);
+ 			sendbar = true;
+ 		}
+ 
+@@ -316,10 +316,15 @@ static void ath_tx_flush_tid(struct ath_
+ }
+ 
+ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
+-			      int seqno)
++			      struct ath_buf *bf)
+ {
++	struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
++	u16 seqno = bf->bf_state.seqno;
+ 	int index, cindex;
+ 
++	if (!fi->baw_tracked)
++		return;
++
+ 	index  = ATH_BA_INDEX(tid->seq_start, seqno);
+ 	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
+ 
+@@ -340,6 +345,9 @@ static void ath_tx_addto_baw(struct ath_
+ 	u16 seqno = bf->bf_state.seqno;
+ 	int index, cindex;
+ 
++	if (fi->baw_tracked)
++		return;
++
+ 	index  = ATH_BA_INDEX(tid->seq_start, seqno);
+ 	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
+ 	__set_bit(cindex, tid->tx_buf);
+@@ -616,7 +624,7 @@ static void ath_tx_complete_aggr(struct
+ 			 * complete the acked-ones/xretried ones; update
+ 			 * block-ack window
+ 			 */
+-			ath_tx_update_baw(sc, tid, seqno);
++			ath_tx_update_baw(sc, tid, bf);
+ 
+ 			if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
+ 				memcpy(tx_info->control.rates, rates, sizeof(rates));
+@@ -646,7 +654,7 @@ static void ath_tx_complete_aggr(struct
+ 				 * run out of tx buf.
+ 				 */
+ 				if (!tbf) {
+-					ath_tx_update_baw(sc, tid, seqno);
++					ath_tx_update_baw(sc, tid, bf);
+ 
+ 					ath_tx_complete_buf(sc, bf, txq,
+ 							    &bf_head, NULL, ts,
+@@ -986,11 +994,14 @@ ath_tx_get_tid_subframe(struct ath_softc
+ 
+ 			INIT_LIST_HEAD(&bf_head);
+ 			list_add(&bf->list, &bf_head);
+-			ath_tx_update_baw(sc, tid, seqno);
++			ath_tx_update_baw(sc, tid, bf);
+ 			ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
+ 			continue;
+ 		}
+ 
++		if (bf_isampdu(bf))
++			ath_tx_addto_baw(sc, tid, bf);
++
+ 		return bf;
+ 	}
+ 
+@@ -1048,8 +1059,6 @@ ath_tx_form_aggr(struct ath_softc *sc, s
+ 		bf->bf_next = NULL;
+ 
+ 		/* link buffers of this frame to the aggregate */
+-		if (!fi->baw_tracked)
+-			ath_tx_addto_baw(sc, tid, bf);
+ 		bf->bf_state.ndelim = ndelim;
+ 
+ 		list_add_tail(&bf->list, bf_q);
+@@ -1685,8 +1694,6 @@ void ath9k_release_buffered_frames(struc
+ 			ath9k_set_moredata(sc, bf, true);
+ 			list_add_tail(&bf->list, &bf_q);
+ 			ath_set_rates(tid->an->vif, tid->an->sta, bf, true);
+-			if (bf_isampdu(bf))
+-				ath_tx_addto_baw(sc, tid, bf);
+ 			if (bf_isaggr(bf)) {
+ 				fi = get_frame_info(bf->bf_mpdu);
+ 				n = ath_compute_num_delims(sc, tid, bf,