--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -168,6 +168,16 @@ static void ath_txq_skb_done(struct ath_
+ }
+ }
+
++static bool ath_tid_has_buffered(struct ath_atx_tid *tid)
++{
++ return !skb_queue_empty(&tid->buf_q);
++}
++
++static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid)
++{
++ return __skb_dequeue(&tid->buf_q);
++}
++
+ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
+ {
+ struct ath_txq *txq = tid->ac->txq;
+@@ -182,7 +192,7 @@ static void ath_tx_flush_tid(struct ath_
+
+ memset(&ts, 0, sizeof(ts));
+
+- while ((skb = __skb_dequeue(&tid->buf_q))) {
++ while ((skb = ath_tid_dequeue(tid))) {
+ fi = get_frame_info(skb);
+ bf = fi->bf;
+
+@@ -266,7 +276,7 @@ static void ath_tid_drain(struct ath_sof
+ memset(&ts, 0, sizeof(ts));
+ INIT_LIST_HEAD(&bf_head);
+
+- while ((skb = __skb_dequeue(&tid->buf_q))) {
++ while ((skb = ath_tid_dequeue(tid))) {
+ fi = get_frame_info(skb);
+ bf = fi->bf;
+
+@@ -815,7 +825,7 @@ static int ath_compute_num_delims(struct
+
+ static struct ath_buf *
+ ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq,
+- struct ath_atx_tid *tid)
++ struct ath_atx_tid *tid, struct sk_buff_head **q)
+ {
+ struct ath_frame_info *fi;
+ struct sk_buff *skb;
+@@ -823,7 +833,8 @@ ath_tx_get_tid_subframe(struct ath_softc
+ u16 seqno;
+
+ while (1) {
+- skb = skb_peek(&tid->buf_q);
++ *q = &tid->buf_q;
++ skb = skb_peek(*q);
+ if (!skb)
+ break;
+
+@@ -833,7 +844,7 @@ ath_tx_get_tid_subframe(struct ath_softc
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+
+ if (!bf) {
+- __skb_unlink(skb, &tid->buf_q);
++ __skb_unlink(skb, *q);
+ ath_txq_skb_done(sc, txq, skb);
+ ieee80211_free_txskb(sc->hw, skb);
+ continue;
+@@ -852,7 +863,7 @@ ath_tx_get_tid_subframe(struct ath_softc
+
+ INIT_LIST_HEAD(&bf_head);
+ list_add(&bf->list, &bf_head);
+- __skb_unlink(skb, &tid->buf_q);
++ __skb_unlink(skb, *q);
+ ath_tx_update_baw(sc, tid, seqno);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
+ continue;
+@@ -881,9 +892,10 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ struct ieee80211_tx_info *tx_info;
+ struct ath_frame_info *fi;
+ struct sk_buff *skb;
++ struct sk_buff_head *tid_q;
+
+ do {
+- bf = ath_tx_get_tid_subframe(sc, txq, tid);
++ bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+ if (!bf) {
+ status = ATH_AGGR_BAW_CLOSED;
+ break;
+@@ -940,14 +952,14 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
+ bf->bf_state.ndelim = ndelim;
+
+- __skb_unlink(skb, &tid->buf_q);
++ __skb_unlink(skb, tid_q);
+ list_add_tail(&bf->list, bf_q);
+ if (bf_prev)
+ bf_prev->bf_next = bf;
+
+ bf_prev = bf;
+
+- } while (!skb_queue_empty(&tid->buf_q));
++ } while (ath_tid_has_buffered(tid));
+
+ *aggr_len = al;
+
+@@ -1222,7 +1234,7 @@ static void ath_tx_sched_aggr(struct ath
+ int aggr_len;
+
+ do {
+- if (skb_queue_empty(&tid->buf_q))
++ if (!ath_tid_has_buffered(tid))
+ return;
+
+ INIT_LIST_HEAD(&bf_q);
+@@ -1326,7 +1338,7 @@ void ath_tx_aggr_sleep(struct ieee80211_
+
+ ath_txq_lock(sc, txq);
+
+- buffered = !skb_queue_empty(&tid->buf_q);
++ buffered = ath_tid_has_buffered(tid);
+
+ tid->sched = false;
+ list_del(&tid->list);
+@@ -1358,7 +1370,7 @@ void ath_tx_aggr_wakeup(struct ath_softc
+ ath_txq_lock(sc, txq);
+ ac->clear_ps_filter = true;
+
+- if (!skb_queue_empty(&tid->buf_q) && !tid->paused) {
++ if (!tid->paused && ath_tid_has_buffered(tid)) {
+ ath_tx_queue_tid(txq, tid);
+ ath_txq_schedule(sc, txq);
+ }
+@@ -1383,7 +1395,7 @@ void ath_tx_aggr_resume(struct ath_softc
+ tid->baw_size = IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor;
+ tid->paused = false;
+
+- if (!skb_queue_empty(&tid->buf_q)) {
++ if (ath_tid_has_buffered(tid)) {
+ ath_tx_queue_tid(txq, tid);
+ ath_txq_schedule(sc, txq);
+ }
+@@ -1403,6 +1415,7 @@ void ath9k_release_buffered_frames(struc
+ struct ieee80211_tx_info *info;
+ struct list_head bf_q;
+ struct ath_buf *bf_tail = NULL, *bf;
++ struct sk_buff_head *tid_q;
+ int sent = 0;
+ int i;
+
+@@ -1418,12 +1431,12 @@ void ath9k_release_buffered_frames(struc
+ continue;
+
+ ath_txq_lock(sc, tid->ac->txq);
+- while (!skb_queue_empty(&tid->buf_q) && nframes > 0) {
+- bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid);
++ while (nframes > 0) {
++ bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid, &tid_q);
+ if (!bf)
+ break;
+
+- __skb_unlink(bf->bf_mpdu, &tid->buf_q);
++ __skb_unlink(bf->bf_mpdu, tid_q);
+ list_add_tail(&bf->list, &bf_q);
+ ath_set_rates(tid->an->vif, tid->an->sta, bf);
+ ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
+@@ -1436,7 +1449,7 @@ void ath9k_release_buffered_frames(struc
+ sent++;
+ TX_STAT_INC(txq->axq_qnum, a_queued_hw);
+
+- if (skb_queue_empty(&tid->buf_q))
++ if (ath_tid_has_buffered(tid))
+ ieee80211_sta_set_buffered(an->sta, i, false);
+ }
+ ath_txq_unlock_complete(sc, tid->ac->txq);
+@@ -1722,7 +1735,7 @@ void ath_txq_schedule(struct ath_softc *
+ * add tid to round-robin queue if more frames
+ * are pending for the tid
+ */
+- if (!skb_queue_empty(&tid->buf_q))
++ if (ath_tid_has_buffered(tid))
+ ath_tx_queue_tid(txq, tid);
+
+ if (tid == last_tid ||
+@@ -1831,7 +1844,7 @@ static void ath_tx_send_ampdu(struct ath
+ * - seqno is not within block-ack window
+ * - h/w queue depth exceeds low water mark
+ */
+- if ((!skb_queue_empty(&tid->buf_q) || tid->paused ||
++ if ((ath_tid_has_buffered(tid) || tid->paused ||
+ !BAW_WITHIN(tid->seq_start, tid->baw_size, tid->seq_next) ||
+ txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) &&
+ txq != sc->tx.uapsdq) {
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -241,6 +241,7 @@ struct ath_buf {
+ struct ath_atx_tid {
+ struct list_head list;
+ struct sk_buff_head buf_q;
++ struct sk_buff_head retry_q;
+ struct ath_node *an;
+ struct ath_atx_ac *ac;
+ unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -170,12 +170,18 @@ static void ath_txq_skb_done(struct ath_
+
+ static bool ath_tid_has_buffered(struct ath_atx_tid *tid)
+ {
+- return !skb_queue_empty(&tid->buf_q);
++ return !skb_queue_empty(&tid->buf_q) || !skb_queue_empty(&tid->retry_q);
+ }
+
+ static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid)
+ {
+- return __skb_dequeue(&tid->buf_q);
++ struct sk_buff *skb;
++
++ skb = __skb_dequeue(&tid->retry_q);
++ if (!skb)
++ skb = __skb_dequeue(&tid->buf_q);
++
++ return skb;
+ }
+
+ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
+@@ -593,7 +599,7 @@ static void ath_tx_complete_aggr(struct
+ if (an->sleeping)
+ ieee80211_sta_set_buffered(sta, tid->tidno, true);
+
+- skb_queue_splice(&bf_pending, &tid->buf_q);
++ skb_queue_splice_tail(&bf_pending, &tid->retry_q);
+ if (!an->sleeping) {
+ ath_tx_queue_tid(txq, tid);
+
+@@ -833,7 +839,10 @@ ath_tx_get_tid_subframe(struct ath_softc
+ u16 seqno;
+
+ while (1) {
+- *q = &tid->buf_q;
++ *q = &tid->retry_q;
++ if (skb_queue_empty(*q))
++ *q = &tid->buf_q;
++
+ skb = skb_peek(*q);
+ if (!skb)
+ break;
+@@ -2608,6 +2617,7 @@ void ath_tx_node_init(struct ath_softc *
+ tid->paused = false;
+ tid->active = false;
+ __skb_queue_head_init(&tid->buf_q);
++ __skb_queue_head_init(&tid->retry_q);
+ acno = TID_TO_WME_AC(tidno);
+ tid->ac = &an->ac[acno];
+ }
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -168,6 +168,20 @@ static void ath_txq_skb_done(struct ath_
+ }
+ }
+
++static struct ath_atx_tid *
++ath_get_skb_tid(struct ath_softc *sc, struct ath_node *an, struct sk_buff *skb)
++{
++ struct ieee80211_hdr *hdr;
++ u8 tidno = 0;
++
++ hdr = (struct ieee80211_hdr *) skb->data;
++ if (ieee80211_is_data_qos(hdr->frame_control))
++ tidno = ieee80211_get_qos_ctl(hdr)[0];
++
++ tidno &= IEEE80211_QOS_CTL_TID_MASK;
++ return ATH_AN_2_TID(an, tidno);
++}
++
+ static bool ath_tid_has_buffered(struct ath_atx_tid *tid)
+ {
+ return !skb_queue_empty(&tid->buf_q) || !skb_queue_empty(&tid->retry_q);
+@@ -419,7 +433,6 @@ static void ath_tx_complete_aggr(struct
+ struct ieee80211_tx_rate rates[4];
+ struct ath_frame_info *fi;
+ int nframes;
+- u8 tidno;
+ bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH);
+ int i, retries;
+ int bar_index = -1;
+@@ -456,8 +469,7 @@ static void ath_tx_complete_aggr(struct
+ }
+
+ an = (struct ath_node *)sta->drv_priv;
+- tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
+- tid = ATH_AN_2_TID(an, tidno);
++ tid = ath_get_skb_tid(sc, an, skb);
+ seq_first = tid->seq_start;
+ isba = ts->ts_flags & ATH9K_TX_BA;
+
+@@ -469,7 +481,7 @@ static void ath_tx_complete_aggr(struct
+ * Only BlockAcks have a TID and therefore normal Acks cannot be
+ * checked
+ */
+- if (isba && tidno != ts->tid)
++ if (isba && tid->tidno != ts->tid)
+ txok = false;
+
+ isaggr = bf_isaggr(bf);
+@@ -2088,7 +2100,6 @@ int ath_tx_start(struct ieee80211_hw *hw
+ struct ath_txq *txq = txctl->txq;
+ struct ath_atx_tid *tid = NULL;
+ struct ath_buf *bf;
+- u8 tidno;
+ int q;
+ int ret;
+
+@@ -2119,9 +2130,7 @@ int ath_tx_start(struct ieee80211_hw *hw
+ }
+
+ if (txctl->an && ieee80211_is_data_qos(hdr->frame_control)) {
+- tidno = ieee80211_get_qos_ctl(hdr)[0] &
+- IEEE80211_QOS_CTL_TID_MASK;
+- tid = ATH_AN_2_TID(txctl->an, tidno);
++ tid = ath_get_skb_tid(sc, txctl->an, skb);
+
+ WARN_ON(tid->ac->txq != txctl->txq);
+ }
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/debug.c
++++ b/drivers/net/wireless/ath/ath9k/debug.c
+@@ -607,6 +607,28 @@ static ssize_t read_file_xmit(struct fil
+ return retval;
+ }
+
++static ssize_t print_queue(struct ath_softc *sc, struct ath_txq *txq,
++ char *buf, ssize_t size)
++{
++ ssize_t len = 0;
++
++ ath_txq_lock(sc, txq);
++
++ len += snprintf(buf + len, size - len, "%s: %d ",
++ "qnum", txq->axq_qnum);
++ len += snprintf(buf + len, size - len, "%s: %2d ",
++ "qdepth", txq->axq_depth);
++ len += snprintf(buf + len, size - len, "%s: %2d ",
++ "ampdu-depth", txq->axq_ampdu_depth);
++ len += snprintf(buf + len, size - len, "%s: %3d ",
++ "pending", txq->pending_frames);
++ len += snprintf(buf + len, size - len, "%s: %d\n",
++ "stopped", txq->stopped);
++
++ ath_txq_unlock(sc, txq);
++ return len;
++}
++
+ static ssize_t read_file_queues(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+ {
+@@ -624,24 +646,13 @@ static ssize_t read_file_queues(struct f
+
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ txq = sc->tx.txq_map[i];
+- len += snprintf(buf + len, size - len, "(%s): ", qname[i]);
+-
+- ath_txq_lock(sc, txq);
+-
+- len += snprintf(buf + len, size - len, "%s: %d ",
+- "qnum", txq->axq_qnum);
+- len += snprintf(buf + len, size - len, "%s: %2d ",
+- "qdepth", txq->axq_depth);
+- len += snprintf(buf + len, size - len, "%s: %2d ",
+- "ampdu-depth", txq->axq_ampdu_depth);
+- len += snprintf(buf + len, size - len, "%s: %3d ",
+- "pending", txq->pending_frames);
+- len += snprintf(buf + len, size - len, "%s: %d\n",
+- "stopped", txq->stopped);
+-
+- ath_txq_unlock(sc, txq);
++ len += snprintf(buf + len, size - len, "(%s): ", qname[i]);
++ len += print_queue(sc, txq, buf + len, size - len);
+ }
+
++ len += snprintf(buf + len, size - len, "(CAB): ");
++ len += print_queue(sc, sc->beacon.cabq, buf + len, size - len);
++
+ if (len > size)
+ len = size;
+
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -906,9 +906,9 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ {
+ #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
+ struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL;
+- int rl = 0, nframes = 0, ndelim, prev_al = 0;
++ int nframes = 0, ndelim;
+ u16 aggr_limit = 0, al = 0, bpad = 0,
+- al_delta, h_baw = tid->baw_size / 2;
++ al_delta, h_baw = tid->baw_size / 2;
+ enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
+ struct ieee80211_tx_info *tx_info;
+ struct ath_frame_info *fi;
+@@ -925,33 +925,24 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ skb = bf->bf_mpdu;
+ fi = get_frame_info(skb);
+
+- if (!bf_first)
++ if (!bf_first) {
+ bf_first = bf;
+-
+- if (!rl) {
+ ath_set_rates(tid->an->vif, tid->an->sta, bf);
+ aggr_limit = ath_lookup_rate(sc, bf, tid);
+- rl = 1;
+ }
+
+ /* do not exceed aggregation limit */
+ al_delta = ATH_AGGR_DELIM_SZ + fi->framelen;
++ if (nframes) {
++ if (aggr_limit < al + bpad + al_delta ||
++ ath_lookup_legacy(bf) || nframes >= h_baw) {
++ status = ATH_AGGR_LIMITED;
++ break;
++ }
+
+- if (nframes &&
+- ((aggr_limit < (al + bpad + al_delta + prev_al)) ||
+- ath_lookup_legacy(bf))) {
+- status = ATH_AGGR_LIMITED;
+- break;
+- }
+-
+- tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+- if (nframes && (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
+- break;
+-
+- /* do not exceed subframe limit */
+- if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) {
+- status = ATH_AGGR_LIMITED;
+- break;
++ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
++ if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
++ break;
+ }
+
+ /* add padding for previous frame to aggregation length */
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -137,7 +137,6 @@ int ath_descdma_setup(struct ath_softc *
+ #define ATH_AGGR_ENCRYPTDELIM 10
+ /* minimum h/w qdepth to be sustained to maximize aggregation */
+ #define ATH_AGGR_MIN_QDEPTH 2
+-#define ATH_AMPDU_SUBFRAME_DEFAULT 32
+
+ #define IEEE80211_SEQ_SEQ_SHIFT 4
+ #define IEEE80211_SEQ_MAX 4096
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -211,8 +211,9 @@ struct ath_frame_info {
+ int framelen;
+ enum ath9k_key_type keytype;
+ u8 keyix;
+- u8 retries;
+ u8 rtscts_rate;
++ u8 retries : 7;
++ u8 baw_tracked : 1;
+ };
+
+ struct ath_buf_state {
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -225,7 +225,7 @@ static void ath_tx_flush_tid(struct ath_
+ }
+ }
+
+- if (fi->retries) {
++ if (fi->baw_tracked) {
+ list_add_tail(&bf->list, &bf_head);
+ ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
+@@ -262,13 +262,16 @@ static void ath_tx_update_baw(struct ath
+ }
+
+ static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
+- u16 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;
+
+ index = ATH_BA_INDEX(tid->seq_start, seqno);
+ cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
+ __set_bit(cindex, tid->tx_buf);
++ fi->baw_tracked = 1;
+
+ if (index >= ((tid->baw_tail - tid->baw_head) &
+ (ATH_TID_MAX_BUFS - 1))) {
+@@ -960,8 +963,8 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ bf->bf_next = NULL;
+
+ /* link buffers of this frame to the aggregate */
+- if (!fi->retries)
+- ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
++ if (!fi->baw_tracked)
++ ath_tx_addto_baw(sc, tid, bf);
+ bf->bf_state.ndelim = ndelim;
+
+ __skb_unlink(skb, tid_q);
+@@ -1451,7 +1454,7 @@ void ath9k_release_buffered_frames(struc
+ __skb_unlink(bf->bf_mpdu, tid_q);
+ list_add_tail(&bf->list, &bf_q);
+ ath_set_rates(tid->an->vif, tid->an->sta, bf);
+- ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
++ ath_tx_addto_baw(sc, tid, bf);
+ bf->bf_state.bf_type &= ~BUF_AGGR;
+ if (bf_tail)
+ bf_tail->bf_next = bf;
+@@ -1884,7 +1887,7 @@ static void ath_tx_send_ampdu(struct ath
+ list_add(&bf->list, &bf_head);
+
+ /* Add sub-frame to BAW */
+- ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
++ ath_tx_addto_baw(sc, tid, bf);
+
+ /* Queue to h/w without aggregation */
+ TX_STAT_INC(txq->axq_qnum, a_queued_hw);
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1328,7 +1328,7 @@ void ath_tx_aggr_stop(struct ath_softc *
+
+ ath_txq_lock(sc, txq);
+ txtid->active = false;
+- txtid->paused = true;
++ txtid->paused = false;
+ ath_tx_flush_tid(sc, txtid);
+ ath_txq_unlock_complete(sc, txq);
+ }
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -672,7 +672,7 @@ static void ath_tx_process_buffer(struct
+ } else
+ ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok);
+
+- if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) && !flush)
++ if (!flush)
+ ath_txq_schedule(sc, txq);
+ }
+
+@@ -848,6 +848,7 @@ static struct ath_buf *
+ ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq,
+ struct ath_atx_tid *tid, struct sk_buff_head **q)
+ {
++ struct ieee80211_tx_info *tx_info;
+ struct ath_frame_info *fi;
+ struct sk_buff *skb;
+ struct ath_buf *bf;
+@@ -874,6 +875,16 @@ ath_tx_get_tid_subframe(struct ath_softc
+ continue;
+ }
+
++ bf->bf_next = NULL;
++ bf->bf_lastbf = bf;
++
++ tx_info = IEEE80211_SKB_CB(skb);
++ tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT;
++ if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) {
++ bf->bf_state.bf_type = 0;
++ return bf;
++ }
++
+ bf->bf_state.bf_type = BUF_AMPDU | BUF_AGGR;
+ seqno = bf->bf_state.seqno;
+
+@@ -893,58 +904,45 @@ ath_tx_get_tid_subframe(struct ath_softc
+ continue;
+ }
+
+- bf->bf_next = NULL;
+- bf->bf_lastbf = bf;
+ return bf;
+ }
+
+ return NULL;
+ }
+
+-static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
+- struct ath_txq *txq,
+- struct ath_atx_tid *tid,
+- struct list_head *bf_q,
+- int *aggr_len)
++static bool
++ath_tx_form_aggr(struct ath_softc *sc, struct ath_txq *txq,
++ struct ath_atx_tid *tid, struct list_head *bf_q,
++ struct ath_buf *bf_first, struct sk_buff_head *tid_q,
++ int *aggr_len)
+ {
+ #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
+- struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL;
++ struct ath_buf *bf = bf_first, *bf_prev = NULL;
+ int nframes = 0, ndelim;
+ u16 aggr_limit = 0, al = 0, bpad = 0,
+ al_delta, h_baw = tid->baw_size / 2;
+- enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
+ struct ieee80211_tx_info *tx_info;
+ struct ath_frame_info *fi;
+ struct sk_buff *skb;
+- struct sk_buff_head *tid_q;
++ bool closed = false;
+
+- do {
+- bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+- if (!bf) {
+- status = ATH_AGGR_BAW_CLOSED;
+- break;
+- }
++ bf = bf_first;
++ aggr_limit = ath_lookup_rate(sc, bf, tid);
+
++ do {
+ skb = bf->bf_mpdu;
+ fi = get_frame_info(skb);
+
+- if (!bf_first) {
+- bf_first = bf;
+- ath_set_rates(tid->an->vif, tid->an->sta, bf);
+- aggr_limit = ath_lookup_rate(sc, bf, tid);
+- }
+-
+ /* do not exceed aggregation limit */
+ al_delta = ATH_AGGR_DELIM_SZ + fi->framelen;
+ if (nframes) {
+ if (aggr_limit < al + bpad + al_delta ||
+- ath_lookup_legacy(bf) || nframes >= h_baw) {
+- status = ATH_AGGR_LIMITED;
++ ath_lookup_legacy(bf) || nframes >= h_baw)
+ break;
+- }
+
+ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+- if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
++ if ((tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
++ !(tx_info->flags & IEEE80211_TX_CTL_AMPDU))
+ break;
+ }
+
+@@ -974,11 +972,26 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+
+ bf_prev = bf;
+
++ bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
++ if (!bf) {
++ closed = true;
++ break;
++ }
+ } while (ath_tid_has_buffered(tid));
+
++ bf = bf_first;
++ bf->bf_lastbf = bf_prev;
++
++ if (bf == bf_prev) {
++ al = get_frame_info(bf->bf_mpdu)->framelen;
++ bf->bf_state.bf_type = BUF_AMPDU;
++ } else {
++ TX_STAT_INC(txq->axq_qnum, a_aggr);
++ }
++
+ *aggr_len = al;
+
+- return status;
++ return closed;
+ #undef PADBYTES
+ }
+
+@@ -1239,14 +1252,45 @@ static void ath_tx_fill_desc(struct ath_
+ }
+ }
+
++static void
++ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq,
++ struct ath_atx_tid *tid, struct list_head *bf_q,
++ struct ath_buf *bf_first, struct sk_buff_head *tid_q)
++{
++ struct ath_buf *bf = bf_first, *bf_prev = NULL;
++ struct sk_buff *skb;
++ int nframes = 0;
++
++ do {
++ skb = bf->bf_mpdu;
++
++ nframes++;
++ __skb_unlink(skb, tid_q);
++ list_add_tail(&bf->list, bf_q);
++ if (bf_prev)
++ bf_prev->bf_next = bf;
++ bf_prev = bf;
++
++ if (nframes >= 2)
++ break;
++
++ bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
++ if (!bf)
++ break;
++
++ ath_set_rates(tid->an->vif, tid->an->sta, bf);
++ } while (1);
++}
++
+ static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
+ struct ath_atx_tid *tid)
+ {
+ struct ath_buf *bf;
+- enum ATH_AGGR_STATUS status;
+ struct ieee80211_tx_info *tx_info;
++ struct sk_buff_head *tid_q;
+ struct list_head bf_q;
+- int aggr_len;
++ int aggr_len = 0;
++ bool aggr, last = true;
+
+ do {
+ if (!ath_tid_has_buffered(tid))
+@@ -1254,38 +1298,31 @@ static void ath_tx_sched_aggr(struct ath
+
+ INIT_LIST_HEAD(&bf_q);
+
+- status = ath_tx_form_aggr(sc, txq, tid, &bf_q, &aggr_len);
+-
+- /*
+- * no frames picked up to be aggregated;
+- * block-ack window is not open.
+- */
+- if (list_empty(&bf_q))
++ bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
++ if (!bf)
+ break;
+
+- bf = list_first_entry(&bf_q, struct ath_buf, list);
+- bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list);
+ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
++ aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
++ if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) ||
++ (!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH))
++ break;
++
++ ath_set_rates(tid->an->vif, tid->an->sta, bf);
++ if (aggr)
++ last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf,
++ tid_q, &aggr_len);
++ else
++ ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q);
+
+ if (tid->ac->clear_ps_filter) {
+ tid->ac->clear_ps_filter = false;
+ tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+- } else {
+- tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT;
+- }
+-
+- /* if only one frame, send as non-aggregate */
+- if (bf == bf->bf_lastbf) {
+- aggr_len = get_frame_info(bf->bf_mpdu)->framelen;
+- bf->bf_state.bf_type = BUF_AMPDU;
+- } else {
+- TX_STAT_INC(txq->axq_qnum, a_aggr);
+ }
+
+ ath_tx_fill_desc(sc, bf, txq, aggr_len);
+ ath_tx_txqaddbuf(sc, txq, &bf_q, false);
+- } while (txq->axq_ampdu_depth < ATH_AGGR_MIN_QDEPTH &&
+- status != ATH_AGGR_BAW_CLOSED);
++ } while (!last);
+ }
+
+ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
+@@ -1844,58 +1881,6 @@ static void ath_tx_txqaddbuf(struct ath_
+ }
+ }
+
+-static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_txq *txq,
+- struct ath_atx_tid *tid, struct sk_buff *skb,
+- struct ath_tx_control *txctl)
+-{
+- struct ath_frame_info *fi = get_frame_info(skb);
+- struct list_head bf_head;
+- struct ath_buf *bf;
+-
+- /*
+- * Do not queue to h/w when any of the following conditions is true:
+- * - there are pending frames in software queue
+- * - the TID is currently paused for ADDBA/BAR request
+- * - seqno is not within block-ack window
+- * - h/w queue depth exceeds low water mark
+- */
+- if ((ath_tid_has_buffered(tid) || tid->paused ||
+- !BAW_WITHIN(tid->seq_start, tid->baw_size, tid->seq_next) ||
+- txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) &&
+- txq != sc->tx.uapsdq) {
+- /*
+- * Add this frame to software queue for scheduling later
+- * for aggregation.
+- */
+- TX_STAT_INC(txq->axq_qnum, a_queued_sw);
+- __skb_queue_tail(&tid->buf_q, skb);
+- if (!txctl->an || !txctl->an->sleeping)
+- ath_tx_queue_tid(txq, tid);
+- return;
+- }
+-
+- bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+- if (!bf) {
+- ath_txq_skb_done(sc, txq, skb);
+- ieee80211_free_txskb(sc->hw, skb);
+- return;
+- }
+-
+- ath_set_rates(tid->an->vif, tid->an->sta, bf);
+- bf->bf_state.bf_type = BUF_AMPDU;
+- INIT_LIST_HEAD(&bf_head);
+- list_add(&bf->list, &bf_head);
+-
+- /* Add sub-frame to BAW */
+- ath_tx_addto_baw(sc, tid, bf);
+-
+- /* Queue to h/w without aggregation */
+- TX_STAT_INC(txq->axq_qnum, a_queued_hw);
+- bf->bf_lastbf = bf;
+- ath_tx_fill_desc(sc, bf, txq, fi->framelen);
+- ath_tx_txqaddbuf(sc, txq, &bf_head, false);
+-}
+-
+ static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
+ struct ath_atx_tid *tid, struct sk_buff *skb)
+ {
+@@ -2121,20 +2106,25 @@ int ath_tx_start(struct ieee80211_hw *hw
+ ath_txq_unlock(sc, txq);
+ txq = sc->tx.uapsdq;
+ ath_txq_lock(sc, txq);
+- }
+-
+- if (txctl->an && ieee80211_is_data_qos(hdr->frame_control)) {
++ } else if (txctl->an &&
++ ieee80211_is_data_present(hdr->frame_control)) {
+ tid = ath_get_skb_tid(sc, txctl->an, skb);
+
+ WARN_ON(tid->ac->txq != txctl->txq);
+- }
+
+- if ((info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
++ if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
++ tid->ac->clear_ps_filter = true;
++
+ /*
+- * Try aggregation if it's a unicast data frame
+- * and the destination is HT capable.
++ * Add this frame to software queue for scheduling later
++ * for aggregation.
+ */
+- ath_tx_send_ampdu(sc, txq, tid, skb, txctl);
++ TX_STAT_INC(txq->axq_qnum, a_queued_sw);
++ __skb_queue_tail(&tid->buf_q, skb);
++ if (!txctl->an->sleeping)
++ ath_tx_queue_tid(txq, tid);
++
++ ath_txq_schedule(sc, txq);
+ goto out;
+ }
+
+@@ -2397,8 +2387,7 @@ static void ath_tx_processq(struct ath_s
+
+ if (list_empty(&txq->axq_q)) {
+ txq->axq_link = NULL;
+- if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
+- ath_txq_schedule(sc, txq);
++ ath_txq_schedule(sc, txq);
+ break;
+ }
+ bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
+@@ -2628,6 +2617,7 @@ void ath_tx_node_init(struct ath_softc *
+ for (acno = 0, ac = &an->ac[acno];
+ acno < IEEE80211_NUM_ACS; acno++, ac++) {
+ ac->sched = false;
++ ac->clear_ps_filter = true;
+ ac->txq = sc->tx.txq_map[acno];
+ INIT_LIST_HEAD(&ac->tid_q);
+ }
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -137,6 +137,8 @@ int ath_descdma_setup(struct ath_softc *
+ #define ATH_AGGR_ENCRYPTDELIM 10
+ /* minimum h/w qdepth to be sustained to maximize aggregation */
+ #define ATH_AGGR_MIN_QDEPTH 2
++/* minimum h/w qdepth for non-aggregated traffic */
++#define ATH_NON_AGGR_MIN_QDEPTH 8
+
+ #define IEEE80211_SEQ_SEQ_SHIFT 4
+ #define IEEE80211_SEQ_MAX 4096
+@@ -173,12 +175,6 @@ int ath_descdma_setup(struct ath_softc *
+
+ #define ATH_TX_COMPLETE_POLL_INT 1000
+
+-enum ATH_AGGR_STATUS {
+- ATH_AGGR_DONE,
+- ATH_AGGR_BAW_CLOSED,
+- ATH_AGGR_LIMITED,
+-};
+-
+ #define ATH_TXFIFO_DEPTH 8
+ struct ath_txq {
+ int mac80211_qnum; /* mac80211 queue number, -1 means not mac80211 Q */
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -1403,9 +1403,6 @@ static void ath9k_sta_notify(struct ieee
+ struct ath_softc *sc = hw->priv;
+ struct ath_node *an = (struct ath_node *) sta->drv_priv;
+
+- if (!sta->ht_cap.ht_supported)
+- return;
+-
+ switch (cmd) {
+ case STA_NOTIFY_SLEEP:
+ an->sleeping = true;
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1282,8 +1282,8 @@ ath_tx_form_burst(struct ath_softc *sc,
+ } while (1);
+ }
+
+-static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
+- struct ath_atx_tid *tid)
++static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
++ struct ath_atx_tid *tid, bool *stop)
+ {
+ struct ath_buf *bf;
+ struct ieee80211_tx_info *tx_info;
+@@ -1292,37 +1292,36 @@ static void ath_tx_sched_aggr(struct ath
+ int aggr_len = 0;
+ bool aggr, last = true;
+
+- do {
+- if (!ath_tid_has_buffered(tid))
+- return;
+-
+- INIT_LIST_HEAD(&bf_q);
++ if (!ath_tid_has_buffered(tid))
++ return false;
+
+- bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+- if (!bf)
+- break;
+-
+- tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+- aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
+- if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) ||
+- (!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH))
+- break;
++ INIT_LIST_HEAD(&bf_q);
+
+- ath_set_rates(tid->an->vif, tid->an->sta, bf);
+- if (aggr)
+- last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf,
+- tid_q, &aggr_len);
+- else
+- ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q);
++ bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
++ if (!bf)
++ return false;
++
++ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
++ aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
++ if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) ||
++ (!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH))
++ return false;
++
++ ath_set_rates(tid->an->vif, tid->an->sta, bf);
++ if (aggr)
++ last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf,
++ tid_q, &aggr_len);
++ else
++ ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q);
+
+- if (tid->ac->clear_ps_filter) {
+- tid->ac->clear_ps_filter = false;
+- tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+- }
++ if (tid->ac->clear_ps_filter) {
++ tid->ac->clear_ps_filter = false;
++ tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
++ }
+
+- ath_tx_fill_desc(sc, bf, txq, aggr_len);
+- ath_tx_txqaddbuf(sc, txq, &bf_q, false);
+- } while (!last);
++ ath_tx_fill_desc(sc, bf, txq, aggr_len);
++ ath_tx_txqaddbuf(sc, txq, &bf_q, false);
++ return true;
+ }
+
+ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
+@@ -1754,8 +1753,9 @@ void ath_tx_cleanupq(struct ath_softc *s
+ */
+ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
+ {
+- struct ath_atx_ac *ac, *ac_tmp, *last_ac;
++ struct ath_atx_ac *ac, *last_ac;
+ struct ath_atx_tid *tid, *last_tid;
++ bool sent = false;
+
+ if (test_bit(SC_OP_HW_RESET, &sc->sc_flags) ||
+ list_empty(&txq->axq_acq) ||
+@@ -1764,15 +1764,17 @@ void ath_txq_schedule(struct ath_softc *
+
+ rcu_read_lock();
+
+- ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
+ last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list);
++ while (!list_empty(&txq->axq_acq)) {
++ bool stop = false;
+
+- list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) {
++ ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
+ last_tid = list_entry(ac->tid_q.prev, struct ath_atx_tid, list);
+ list_del(&ac->list);
+ ac->sched = false;
+
+ while (!list_empty(&ac->tid_q)) {
++
+ tid = list_first_entry(&ac->tid_q, struct ath_atx_tid,
+ list);
+ list_del(&tid->list);
+@@ -1781,7 +1783,8 @@ void ath_txq_schedule(struct ath_softc *
+ if (tid->paused)
+ continue;
+
+- ath_tx_sched_aggr(sc, txq, tid);
++ if (ath_tx_sched_aggr(sc, txq, tid, &stop))
++ sent = true;
+
+ /*
+ * add tid to round-robin queue if more frames
+@@ -1790,8 +1793,7 @@ void ath_txq_schedule(struct ath_softc *
+ if (ath_tid_has_buffered(tid))
+ ath_tx_queue_tid(txq, tid);
+
+- if (tid == last_tid ||
+- txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
++ if (stop || tid == last_tid)
+ break;
+ }
+
+@@ -1800,9 +1802,17 @@ void ath_txq_schedule(struct ath_softc *
+ list_add_tail(&ac->list, &txq->axq_acq);
+ }
+
+- if (ac == last_ac ||
+- txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH)
++ if (stop)
+ break;
++
++ if (ac == last_ac) {
++ if (!sent)
++ break;
++
++ sent = false;
++ last_ac = list_entry(txq->axq_acq.prev,
++ struct ath_atx_ac, list);
++ }
+ }
+
+ rcu_read_unlock();
--- /dev/null
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -265,6 +265,7 @@ struct ath_node {
+ u8 mpdudensity;
+
+ bool sleeping;
++ bool no_ps_filter;
+
+ #if defined(CPTCFG_MAC80211_DEBUGFS) && defined(CPTCFG_ATH9K_DEBUGFS)
+ struct dentry *node_stat;
+@@ -364,6 +365,7 @@ void ath9k_release_buffered_frames(struc
+ /********/
+
+ struct ath_vif {
++ struct ath_node mcast_node;
+ int av_bslot;
+ bool primary_sta_vif;
+ __le64 tsf_adjust; /* TSF adjustment for staggered beacons */
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -971,6 +971,8 @@ static int ath9k_add_interface(struct ie
+ struct ath_softc *sc = hw->priv;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
++ struct ath_vif *avp = (void *)vif->drv_priv;
++ struct ath_node *an = &avp->mcast_node;
+
+ mutex_lock(&sc->mutex);
+
+@@ -984,6 +986,12 @@ static int ath9k_add_interface(struct ie
+ if (ath9k_uses_beacons(vif->type))
+ ath9k_beacon_assign_slot(sc, vif);
+
++ an->sc = sc;
++ an->sta = NULL;
++ an->vif = vif;
++ an->no_ps_filter = true;
++ ath_tx_node_init(sc, an);
++
+ mutex_unlock(&sc->mutex);
+ return 0;
+ }
+@@ -1021,6 +1029,7 @@ static void ath9k_remove_interface(struc
+ {
+ struct ath_softc *sc = hw->priv;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
++ struct ath_vif *avp = (void *)vif->drv_priv;
+
+ ath_dbg(common, CONFIG, "Detach Interface\n");
+
+@@ -1035,6 +1044,8 @@ static void ath9k_remove_interface(struc
+ ath9k_calculate_summary_state(hw, NULL);
+ ath9k_ps_restore(sc);
+
++ ath_tx_node_cleanup(sc, &avp->mcast_node);
++
+ mutex_unlock(&sc->mutex);
+ }
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -135,6 +135,9 @@ static struct ath_frame_info *get_frame_
+
+ static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno)
+ {
++ if (!tid->an->sta)
++ return;
++
+ ieee80211_send_bar(tid->an->vif, tid->an->sta->addr, tid->tidno,
+ seqno << IEEE80211_SEQ_SEQ_SHIFT);
+ }
+@@ -1314,7 +1317,7 @@ static bool ath_tx_sched_aggr(struct ath
+ else
+ ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q);
+
+- if (tid->ac->clear_ps_filter) {
++ if (tid->ac->clear_ps_filter || tid->an->no_ps_filter) {
+ tid->ac->clear_ps_filter = false;
+ tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+ }
+@@ -1500,7 +1503,7 @@ void ath9k_release_buffered_frames(struc
+ sent++;
+ TX_STAT_INC(txq->axq_qnum, a_queued_hw);
+
+- if (ath_tid_has_buffered(tid))
++ if (an->sta && ath_tid_has_buffered(tid))
+ ieee80211_sta_set_buffered(an->sta, i, false);
+ }
+ ath_txq_unlock_complete(sc, tid->ac->txq);
+@@ -2033,6 +2036,7 @@ static int ath_tx_prepare(struct ieee802
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_sta *sta = txctl->sta;
+ struct ieee80211_vif *vif = info->control.vif;
++ struct ath_vif *avp;
+ struct ath_softc *sc = hw->priv;
+ int frmlen = skb->len + FCS_LEN;
+ int padpos, padsize;
+@@ -2040,6 +2044,10 @@ static int ath_tx_prepare(struct ieee802
+ /* NOTE: sta can be NULL according to net/mac80211.h */
+ if (sta)
+ txctl->an = (struct ath_node *)sta->drv_priv;
++ else if (vif && ieee80211_is_data(hdr->frame_control)) {
++ avp = (void *)vif->drv_priv;
++ txctl->an = &avp->mcast_node;
++ }
+
+ if (info->control.hw_key)
+ frmlen += info->control.hw_key->icv_len;
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