From beecadaf00effb5564b513424bc597e735bcd382 Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 18 May 2011 12:03:08 +0000
Subject: [PATCH] ath9k: clean up tx fifo handling on ar9380 based hardware
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26934 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../patches/580-ath9k_tx_fifo_cleanup.patch | 610 ++++++++++++++++++
.../581-ath9k_remove_get_desc_link.patch | 70 ++
2 files changed, 680 insertions(+)
create mode 100644 package/mac80211/patches/580-ath9k_tx_fifo_cleanup.patch
create mode 100644 package/mac80211/patches/581-ath9k_remove_get_desc_link.patch
diff --git a/package/mac80211/patches/580-ath9k_tx_fifo_cleanup.patch b/package/mac80211/patches/580-ath9k_tx_fifo_cleanup.patch
new file mode 100644
index 000000000..630fb7dc9
--- /dev/null
+++ b/package/mac80211/patches/580-ath9k_tx_fifo_cleanup.patch
@@ -0,0 +1,610 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -53,7 +53,7 @@ static void ath_tx_complete_buf(struct a
+ struct ath_txq *txq, struct list_head *bf_q,
+ struct ath_tx_status *ts, int txok, int sendbar);
+ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
+- struct list_head *head);
++ struct list_head *head, bool internal);
+ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len);
+ static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf,
+ struct ath_tx_status *ts, int nframes, int nbad,
+@@ -377,8 +377,7 @@ static void ath_tx_complete_aggr(struct
+ bf_next = bf->bf_next;
+
+ bf->bf_state.bf_type |= BUF_XRETRY;
+- if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) ||
+- !bf->bf_stale || bf_next != NULL)
++ if (!bf->bf_stale || bf_next != NULL)
+ list_move_tail(&bf->list, &bf_head);
+
+ ath_tx_rc_status(sc, bf, ts, 1, 1, 0, false);
+@@ -463,20 +462,14 @@ static void ath_tx_complete_aggr(struct
+ }
+ }
+
+- if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
+- bf_next == NULL) {
+- /*
+- * Make sure the last desc is reclaimed if it
+- * not a holding desc.
+- */
+- if (!bf_last->bf_stale)
+- list_move_tail(&bf->list, &bf_head);
+- else
+- INIT_LIST_HEAD(&bf_head);
+- } else {
+- BUG_ON(list_empty(bf_q));
++ /*
++ * Make sure the last desc is reclaimed if it
++ * not a holding desc.
++ */
++ if (!bf_last->bf_stale || bf_next != NULL)
+ list_move_tail(&bf->list, &bf_head);
+- }
++ else
++ INIT_LIST_HEAD(&bf_head);
+
+ if (!txpending || (tid->state & AGGR_CLEANUP)) {
+ /*
+@@ -837,7 +830,7 @@ static void ath_tx_sched_aggr(struct ath
+ bf->bf_state.bf_type &= ~BUF_AGGR;
+ ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc);
+ ath_buf_set_rate(sc, bf, fi->framelen);
+- ath_tx_txqaddbuf(sc, txq, &bf_q);
++ ath_tx_txqaddbuf(sc, txq, &bf_q, false);
+ continue;
+ }
+
+@@ -849,7 +842,7 @@ static void ath_tx_sched_aggr(struct ath
+ /* anchor last desc of aggregate */
+ ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc);
+
+- ath_tx_txqaddbuf(sc, txq, &bf_q);
++ ath_tx_txqaddbuf(sc, txq, &bf_q, false);
+ TX_STAT_INC(txq->axq_qnum, a_aggr);
+
+ } while (txq->axq_ampdu_depth < ATH_AGGR_MIN_QDEPTH &&
+@@ -1085,7 +1078,6 @@ struct ath_txq *ath_txq_setup(struct ath
+ txq->txq_headidx = txq->txq_tailidx = 0;
+ for (i = 0; i < ATH_TXFIFO_DEPTH; i++)
+ INIT_LIST_HEAD(&txq->txq_fifo[i]);
+- INIT_LIST_HEAD(&txq->txq_fifo_pending);
+ }
+ return &sc->tx.txq[axq_qnum];
+ }
+@@ -1155,13 +1147,8 @@ static bool bf_is_ampdu_not_probing(stru
+ return bf_isampdu(bf) && !(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE);
+ }
+
+-/*
+- * Drain a given TX queue (could be Beacon or Data)
+- *
+- * This assumes output has been stopped and
+- * we do not need to block ath_tx_tasklet.
+- */
+-void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx)
++static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq,
++ struct list_head *list, bool retry_tx)
+ {
+ struct ath_buf *bf, *lastbf;
+ struct list_head bf_head;
+@@ -1170,93 +1157,63 @@ void ath_draintxq(struct ath_softc *sc,
+ memset(&ts, 0, sizeof(ts));
+ INIT_LIST_HEAD(&bf_head);
+
+- for (;;) {
+- spin_lock_bh(&txq->axq_lock);
++ while (!list_empty(list)) {
++ bf = list_first_entry(list, struct ath_buf, list);
+
+- if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+- if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) {
+- txq->txq_headidx = txq->txq_tailidx = 0;
+- spin_unlock_bh(&txq->axq_lock);
+- break;
+- } else {
+- bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx],
+- struct ath_buf, list);
+- }
+- } else {
+- if (list_empty(&txq->axq_q)) {
+- txq->axq_link = NULL;
+- spin_unlock_bh(&txq->axq_lock);
+- break;
+- }
+- bf = list_first_entry(&txq->axq_q, struct ath_buf,
+- list);
+-
+- if (bf->bf_stale) {
+- list_del(&bf->list);
+- spin_unlock_bh(&txq->axq_lock);
++ if (bf->bf_stale) {
++ list_del(&bf->list);
+
+- ath_tx_return_buffer(sc, bf);
+- continue;
+- }
++ ath_tx_return_buffer(sc, bf);
++ continue;
+ }
+
+ lastbf = bf->bf_lastbf;
+-
+- if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+- list_cut_position(&bf_head,
+- &txq->txq_fifo[txq->txq_tailidx],
+- &lastbf->list);
+- INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH);
+- } else {
+- /* remove ath_buf's of the same mpdu from txq */
+- list_cut_position(&bf_head, &txq->axq_q, &lastbf->list);
+- }
++ list_cut_position(&bf_head, list, &lastbf->list);
+
+ txq->axq_depth--;
+ if (bf_is_ampdu_not_probing(bf))
+ txq->axq_ampdu_depth--;
+- spin_unlock_bh(&txq->axq_lock);
+
++ spin_unlock_bh(&txq->axq_lock);
+ if (bf_isampdu(bf))
+ 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);
++ spin_lock_bh(&txq->axq_lock);
+ }
++}
+
++/*
++ * Drain a given TX queue (could be Beacon or Data)
++ *
++ * This assumes output has been stopped and
++ * we do not need to block ath_tx_tasklet.
++ */
++void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx)
++{
+ spin_lock_bh(&txq->axq_lock);
+- txq->axq_tx_inprogress = false;
+- spin_unlock_bh(&txq->axq_lock);
+-
+ if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+- spin_lock_bh(&txq->axq_lock);
+- while (!list_empty(&txq->txq_fifo_pending)) {
+- bf = list_first_entry(&txq->txq_fifo_pending,
+- struct ath_buf, list);
+- list_cut_position(&bf_head,
+- &txq->txq_fifo_pending,
+- &bf->bf_lastbf->list);
+- spin_unlock_bh(&txq->axq_lock);
++ int idx = txq->txq_tailidx;
+
+- if (bf_isampdu(bf))
+- 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);
+- spin_lock_bh(&txq->axq_lock);
++ while (!list_empty(&txq->txq_fifo[idx])) {
++ ath_drain_txq_list(sc, txq, &txq->txq_fifo[idx],
++ retry_tx);
++
++ INCR(idx, ATH_TXFIFO_DEPTH);
+ }
+- spin_unlock_bh(&txq->axq_lock);
++ txq->txq_tailidx = idx;
+ }
+
++ txq->axq_link = NULL;
++ txq->axq_tx_inprogress = false;
++ ath_drain_txq_list(sc, txq, &txq->axq_q, retry_tx);
++
+ /* flush any pending frames if aggregation is enabled */
+- if (sc->sc_flags & SC_OP_TXAGGR) {
+- if (!retry_tx) {
+- spin_lock_bh(&txq->axq_lock);
+- ath_txq_drain_pending_buffers(sc, txq);
+- spin_unlock_bh(&txq->axq_lock);
+- }
+- }
++ if ((sc->sc_flags & SC_OP_TXAGGR) && !retry_tx)
++ ath_txq_drain_pending_buffers(sc, txq);
++
++ spin_unlock_bh(&txq->axq_lock);
+ }
+
+ bool ath_drain_all_txq(struct ath_softc *sc, bool retry_tx)
+@@ -1370,11 +1327,13 @@ void ath_txq_schedule(struct ath_softc *
+ * assume the descriptors are already chained together by caller.
+ */
+ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
+- struct list_head *head)
++ struct list_head *head, bool internal)
+ {
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+- struct ath_buf *bf;
++ struct ath_buf *bf, *bf_last;
++ bool puttxbuf = false;
++ bool edma;
+
+ /*
+ * Insert the frame on the outbound list and
+@@ -1384,51 +1343,49 @@ static void ath_tx_txqaddbuf(struct ath_
+ if (list_empty(head))
+ return;
+
++ edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
+ bf = list_first_entry(head, struct ath_buf, list);
++ bf_last = list_entry(head->prev, struct ath_buf, list);
+
+ ath_dbg(common, ATH_DBG_QUEUE,
+ "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth);
+
+- if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+- if (txq->axq_depth >= ATH_TXFIFO_DEPTH) {
+- list_splice_tail_init(head, &txq->txq_fifo_pending);
+- return;
+- }
+- if (!list_empty(&txq->txq_fifo[txq->txq_headidx]))
+- ath_dbg(common, ATH_DBG_XMIT,
+- "Initializing tx fifo %d which is non-empty\n",
+- txq->txq_headidx);
+- INIT_LIST_HEAD(&txq->txq_fifo[txq->txq_headidx]);
+- list_splice_init(head, &txq->txq_fifo[txq->txq_headidx]);
++ if (edma && list_empty(&txq->txq_fifo[txq->txq_headidx])) {
++ list_splice_tail_init(head, &txq->txq_fifo[txq->txq_headidx]);
+ INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH);
+- TX_STAT_INC(txq->axq_qnum, puttxbuf);
+- ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr);
+- ath_dbg(common, ATH_DBG_XMIT, "TXDP[%u] = %llx (%p)\n",
+- txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc);
++ puttxbuf = true;
+ } else {
+ list_splice_tail_init(head, &txq->axq_q);
+
+- if (txq->axq_link == NULL) {
+- TX_STAT_INC(txq->axq_qnum, puttxbuf);
+- ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr);
+- ath_dbg(common, ATH_DBG_XMIT, "TXDP[%u] = %llx (%p)\n",
+- txq->axq_qnum, ito64(bf->bf_daddr),
+- bf->bf_desc);
+- } else {
+- *txq->axq_link = bf->bf_daddr;
++ if (txq->axq_link) {
++ ath9k_hw_set_desc_link(ah, txq->axq_link, bf->bf_daddr);
+ ath_dbg(common, ATH_DBG_XMIT,
+ "link[%u] (%p)=%llx (%p)\n",
+ txq->axq_qnum, txq->axq_link,
+ ito64(bf->bf_daddr), bf->bf_desc);
+- }
+- ath9k_hw_get_desc_link(ah, bf->bf_lastbf->bf_desc,
+- &txq->axq_link);
++ } else if (!edma)
++ puttxbuf = true;
++
++ txq->axq_link = bf_last->bf_desc;
++ }
++
++ if (puttxbuf) {
++ TX_STAT_INC(txq->axq_qnum, puttxbuf);
++ ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr);
++ ath_dbg(common, ATH_DBG_XMIT, "TXDP[%u] = %llx (%p)\n",
++ txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc);
++ }
++
++ if (!edma) {
+ TX_STAT_INC(txq->axq_qnum, txstart);
+ ath9k_hw_txstart(ah, txq->axq_qnum);
+ }
+- txq->axq_depth++;
+- if (bf_is_ampdu_not_probing(bf))
+- txq->axq_ampdu_depth++;
++
++ if (!internal) {
++ txq->axq_depth++;
++ if (bf_is_ampdu_not_probing(bf))
++ txq->axq_ampdu_depth++;
++ }
+ }
+
+ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
+@@ -1470,7 +1427,7 @@ static void ath_tx_send_ampdu(struct ath
+ TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw);
+ bf->bf_lastbf = bf;
+ ath_buf_set_rate(sc, bf, fi->framelen);
+- ath_tx_txqaddbuf(sc, txctl->txq, &bf_head);
++ ath_tx_txqaddbuf(sc, txctl->txq, &bf_head, false);
+ }
+
+ static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
+@@ -1490,7 +1447,7 @@ static void ath_tx_send_normal(struct at
+ bf->bf_lastbf = bf;
+ fi = get_frame_info(bf->bf_mpdu);
+ ath_buf_set_rate(sc, bf, fi->framelen);
+- ath_tx_txqaddbuf(sc, txq, bf_head);
++ ath_tx_txqaddbuf(sc, txq, bf_head, false);
+ TX_STAT_INC(txq->axq_qnum, queued);
+ }
+
+@@ -2077,6 +2034,38 @@ static void ath_tx_rc_status(struct ath_
+ tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1;
+ }
+
++static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq,
++ struct ath_tx_status *ts, struct ath_buf *bf,
++ struct list_head *bf_head)
++{
++ int txok;
++
++ txq->axq_depth--;
++ txok = !(ts->ts_status & ATH9K_TXERR_MASK);
++ txq->axq_tx_inprogress = false;
++ if (bf_is_ampdu_not_probing(bf))
++ txq->axq_ampdu_depth--;
++
++ spin_unlock_bh(&txq->axq_lock);
++
++ if (!bf_isampdu(bf)) {
++ /*
++ * This frame is sent out as a single frame.
++ * Use hardware retry status for this frame.
++ */
++ 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);
++ } else
++ ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok, true);
++
++ spin_lock_bh(&txq->axq_lock);
++
++ if (sc->sc_flags & SC_OP_TXAGGR)
++ ath_txq_schedule(sc, txq);
++}
++
+ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
+ {
+ struct ath_hw *ah = sc->sc_ah;
+@@ -2085,20 +2074,18 @@ static void ath_tx_processq(struct ath_s
+ struct list_head bf_head;
+ struct ath_desc *ds;
+ struct ath_tx_status ts;
+- int txok;
+ int status;
+
+ ath_dbg(common, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n",
+ txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum),
+ txq->axq_link);
+
++ spin_lock_bh(&txq->axq_lock);
+ for (;;) {
+- spin_lock_bh(&txq->axq_lock);
+ if (list_empty(&txq->axq_q)) {
+ txq->axq_link = NULL;
+ if (sc->sc_flags & SC_OP_TXAGGR)
+ ath_txq_schedule(sc, txq);
+- spin_unlock_bh(&txq->axq_lock);
+ break;
+ }
+ bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
+@@ -2114,13 +2101,11 @@ static void ath_tx_processq(struct ath_s
+ bf_held = NULL;
+ if (bf->bf_stale) {
+ bf_held = bf;
+- if (list_is_last(&bf_held->list, &txq->axq_q)) {
+- spin_unlock_bh(&txq->axq_lock);
++ if (list_is_last(&bf_held->list, &txq->axq_q))
+ break;
+- } else {
+- bf = list_entry(bf_held->list.next,
+- struct ath_buf, list);
+- }
++
++ bf = list_entry(bf_held->list.next, struct ath_buf,
++ list);
+ }
+
+ lastbf = bf->bf_lastbf;
+@@ -2128,10 +2113,9 @@ static void ath_tx_processq(struct ath_s
+
+ memset(&ts, 0, sizeof(ts));
+ status = ath9k_hw_txprocdesc(ah, ds, &ts);
+- if (status == -EINPROGRESS) {
+- spin_unlock_bh(&txq->axq_lock);
++ if (status == -EINPROGRESS)
+ break;
+- }
++
+ TX_STAT_INC(txq->axq_qnum, txprocdesc);
+
+ /*
+@@ -2145,42 +2129,14 @@ static void ath_tx_processq(struct ath_s
+ list_cut_position(&bf_head,
+ &txq->axq_q, lastbf->list.prev);
+
+- txq->axq_depth--;
+- txok = !(ts.ts_status & ATH9K_TXERR_MASK);
+- txq->axq_tx_inprogress = false;
+- if (bf_held)
++ if (bf_held) {
+ list_del(&bf_held->list);
+-
+- if (bf_is_ampdu_not_probing(bf))
+- txq->axq_ampdu_depth--;
+-
+- spin_unlock_bh(&txq->axq_lock);
+-
+- if (bf_held)
+ ath_tx_return_buffer(sc, bf_held);
+-
+- if (!bf_isampdu(bf)) {
+- /*
+- * This frame is sent out as a single frame.
+- * Use hardware retry status for this frame.
+- */
+- 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);
+ }
+
+- if (bf_isampdu(bf))
+- ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, txok,
+- true);
+- else
+- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, txok, 0);
+-
+- spin_lock_bh(&txq->axq_lock);
+-
+- if (sc->sc_flags & SC_OP_TXAGGR)
+- ath_txq_schedule(sc, txq);
+- spin_unlock_bh(&txq->axq_lock);
++ ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head);
+ }
++ spin_unlock_bh(&txq->axq_lock);
+ }
+
+ static void ath_tx_complete_poll_work(struct work_struct *work)
+@@ -2237,17 +2193,17 @@ void ath_tx_tasklet(struct ath_softc *sc
+
+ void ath_tx_edma_tasklet(struct ath_softc *sc)
+ {
+- struct ath_tx_status txs;
++ struct ath_tx_status ts;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_txq *txq;
+ struct ath_buf *bf, *lastbf;
+ struct list_head bf_head;
+ int status;
+- int txok;
+
++ spin_lock_bh(&txq->axq_lock);
+ for (;;) {
+- status = ath9k_hw_txprocdesc(ah, NULL, (void *)&txs);
++ status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts);
+ if (status == -EINPROGRESS)
+ break;
+ if (status == -EIO) {
+@@ -2257,16 +2213,16 @@ void ath_tx_edma_tasklet(struct ath_soft
+ }
+
+ /* Skip beacon completions */
+- if (txs.qid == sc->beacon.beaconq)
++ if (ts.qid == sc->beacon.beaconq)
+ continue;
+
+- txq = &sc->tx.txq[txs.qid];
++ ath_dbg(common, ATH_DBG_XMIT,
++ "Tx status, descid=%04x\n", ts.desc_id);
+
+- spin_lock_bh(&txq->axq_lock);
+- if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) {
+- spin_unlock_bh(&txq->axq_lock);
+- return;
+- }
++ txq = &sc->tx.txq[ts.qid];
++
++ if (list_empty(&txq->txq_fifo[txq->txq_tailidx]))
++ break;
+
+ bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx],
+ struct ath_buf, list);
+@@ -2275,43 +2231,24 @@ void ath_tx_edma_tasklet(struct ath_soft
+ INIT_LIST_HEAD(&bf_head);
+ list_cut_position(&bf_head, &txq->txq_fifo[txq->txq_tailidx],
+ &lastbf->list);
+- INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH);
+- txq->axq_depth--;
+- txq->axq_tx_inprogress = false;
+- if (bf_is_ampdu_not_probing(bf))
+- txq->axq_ampdu_depth--;
+- spin_unlock_bh(&txq->axq_lock);
+
+- txok = !(txs.ts_status & ATH9K_TXERR_MASK);
++ if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) {
++ INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH);
+
+- if (!bf_isampdu(bf)) {
+- if (txs.ts_status & ATH9K_TXERR_XRETRY)
+- bf->bf_state.bf_type |= BUF_XRETRY;
+- ath_tx_rc_status(sc, bf, &txs, 1, txok ? 0 : 1, txok, true);
+- }
++ if (!list_empty(&txq->axq_q)) {
++ struct list_head bf_q;
+
+- if (bf_isampdu(bf))
+- ath_tx_complete_aggr(sc, txq, bf, &bf_head, &txs,
+- txok, true);
+- else
+- ath_tx_complete_buf(sc, bf, txq, &bf_head,
+- &txs, txok, 0);
+-
+- spin_lock_bh(&txq->axq_lock);
++ INIT_LIST_HEAD(&bf_q);
++ txq->axq_link = NULL;
++ list_splice_tail_init(&txq->axq_q, &bf_q);
++ ath_tx_txqaddbuf(sc, txq, &bf_q, true);
++ }
++ }
+
+- if (!list_empty(&txq->txq_fifo_pending)) {
+- INIT_LIST_HEAD(&bf_head);
+- bf = list_first_entry(&txq->txq_fifo_pending,
+- struct ath_buf, list);
+- list_cut_position(&bf_head,
+- &txq->txq_fifo_pending,
+- &bf->bf_lastbf->list);
+- ath_tx_txqaddbuf(sc, txq, &bf_head);
+- } else if (sc->sc_flags & SC_OP_TXAGGR)
+- ath_txq_schedule(sc, txq);
++ ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head);
+
+- spin_unlock_bh(&txq->axq_lock);
+ }
++ spin_unlock_bh(&txq->axq_lock);
+ }
+
+ /*****************/
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -179,7 +179,7 @@ enum ATH_AGGR_STATUS {
+ struct ath_txq {
+ int mac80211_qnum; /* mac80211 queue number, -1 means not mac80211 Q */
+ u32 axq_qnum; /* ath9k hardware queue number */
+- u32 *axq_link;
++ void *axq_link;
+ struct list_head axq_q;
+ spinlock_t axq_lock;
+ u32 axq_depth;
+@@ -188,7 +188,6 @@ struct ath_txq {
+ bool axq_tx_inprogress;
+ struct list_head axq_acq;
+ struct list_head txq_fifo[ATH_TXFIFO_DEPTH];
+- struct list_head txq_fifo_pending;
+ u8 txq_headidx;
+ u8 txq_tailidx;
+ int pending_frames;
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -62,8 +62,6 @@ static bool ath9k_has_pending_frames(str
+
+ if (txq->axq_depth || !list_empty(&txq->axq_acq))
+ pending = true;
+- else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
+- pending = !list_empty(&txq->txq_fifo_pending);
+
+ spin_unlock_bh(&txq->axq_lock);
+ return pending;
+--- a/drivers/net/wireless/ath/ath9k/debug.c
++++ b/drivers/net/wireless/ath/ath9k/debug.c
+@@ -586,7 +586,6 @@ static ssize_t read_file_xmit(struct fil
+
+ PRQLE("axq_q empty: ", axq_q);
+ PRQLE("axq_acq empty: ", axq_acq);
+- PRQLE("txq_fifo_pending: ", txq_fifo_pending);
+ for (i = 0; i < ATH_TXFIFO_DEPTH; i++) {
+ snprintf(tmp, sizeof(tmp) - 1, "txq_fifo[%i] empty: ", i);
+ PRQLE(tmp, txq_fifo[i]);
diff --git a/package/mac80211/patches/581-ath9k_remove_get_desc_link.patch b/package/mac80211/patches/581-ath9k_remove_get_desc_link.patch
new file mode 100644
index 000000000..507284292
--- /dev/null
+++ b/package/mac80211/patches/581-ath9k_remove_get_desc_link.patch
@@ -0,0 +1,70 @@
+--- a/drivers/net/wireless/ath/ath9k/ar9002_mac.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_mac.c
+@@ -28,11 +28,6 @@ static void ar9002_hw_set_desc_link(void
+ ((struct ath_desc*) ds)->ds_link = ds_link;
+ }
+
+-static void ar9002_hw_get_desc_link(void *ds, u32 **ds_link)
+-{
+- *ds_link = &((struct ath_desc *)ds)->ds_link;
+-}
+-
+ static bool ar9002_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
+ {
+ u32 isr = 0;
+@@ -437,7 +432,6 @@ void ar9002_hw_attach_mac_ops(struct ath
+
+ ops->rx_enable = ar9002_hw_rx_enable;
+ ops->set_desc_link = ar9002_hw_set_desc_link;
+- ops->get_desc_link = ar9002_hw_get_desc_link;
+ ops->get_isr = ar9002_hw_get_isr;
+ ops->fill_txdesc = ar9002_hw_fill_txdesc;
+ ops->proc_txdesc = ar9002_hw_proc_txdesc;
+--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+@@ -43,13 +43,6 @@ static void ar9003_hw_set_desc_link(void
+ ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
+ }
+
+-static void ar9003_hw_get_desc_link(void *ds, u32 **ds_link)
+-{
+- struct ar9003_txc *ads = ds;
+-
+- *ds_link = &ads->link;
+-}
+-
+ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
+ {
+ u32 isr = 0;
+@@ -498,7 +491,6 @@ void ar9003_hw_attach_mac_ops(struct ath
+
+ ops->rx_enable = ar9003_hw_rx_enable;
+ ops->set_desc_link = ar9003_hw_set_desc_link;
+- ops->get_desc_link = ar9003_hw_get_desc_link;
+ ops->get_isr = ar9003_hw_get_isr;
+ ops->fill_txdesc = ar9003_hw_fill_txdesc;
+ ops->proc_txdesc = ar9003_hw_proc_txdesc;
+--- a/drivers/net/wireless/ath/ath9k/hw-ops.h
++++ b/drivers/net/wireless/ath/ath9k/hw-ops.h
+@@ -39,11 +39,6 @@ static inline void ath9k_hw_set_desc_lin
+ ath9k_hw_ops(ah)->set_desc_link(ds, link);
+ }
+
+-static inline void ath9k_hw_get_desc_link(struct ath_hw *ah, void *ds,
+- u32 **link)
+-{
+- ath9k_hw_ops(ah)->get_desc_link(ds, link);
+-}
+ static inline bool ath9k_hw_calibrate(struct ath_hw *ah,
+ struct ath9k_channel *chan,
+ u8 rxchainmask,
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -603,7 +603,6 @@ struct ath_hw_ops {
+ int power_off);
+ void (*rx_enable)(struct ath_hw *ah);
+ void (*set_desc_link)(void *ds, u32 link);
+- void (*get_desc_link)(void *ds, u32 **link);
+ bool (*calibrate)(struct ath_hw *ah,
+ struct ath9k_channel *chan,
+ u8 rxchainmask,
--
2.20.1