diff options
Diffstat (limited to 'package/mac80211/patches/563-ath9k_simplify_tx_locking.patch')
| -rw-r--r-- | package/mac80211/patches/563-ath9k_simplify_tx_locking.patch | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/package/mac80211/patches/563-ath9k_simplify_tx_locking.patch b/package/mac80211/patches/563-ath9k_simplify_tx_locking.patch new file mode 100644 index 0000000000..c6b3ad231c --- /dev/null +++ b/package/mac80211/patches/563-ath9k_simplify_tx_locking.patch @@ -0,0 +1,247 @@ +--- a/drivers/net/wireless/ath/ath9k/xmit.c ++++ b/drivers/net/wireless/ath/ath9k/xmit.c +@@ -169,13 +169,11 @@ static void ath_tx_flush_tid(struct ath_ + INIT_LIST_HEAD(&bf_head); + + memset(&ts, 0, sizeof(ts)); +- spin_lock_bh(&txq->axq_lock); + + while ((skb = __skb_dequeue(&tid->buf_q))) { + fi = get_frame_info(skb); + bf = fi->bf; + +- spin_unlock_bh(&txq->axq_lock); + if (bf && fi->retries) { + list_add_tail(&bf->list, &bf_head); + ath_tx_update_baw(sc, tid, bf->bf_state.seqno); +@@ -184,7 +182,6 @@ static void ath_tx_flush_tid(struct ath_ + } else { + ath_tx_send_normal(sc, txq, NULL, skb); + } +- spin_lock_bh(&txq->axq_lock); + } + + if (tid->baw_head == tid->baw_tail) { +@@ -192,8 +189,6 @@ static void ath_tx_flush_tid(struct ath_ + tid->state &= ~AGGR_CLEANUP; + } + +- spin_unlock_bh(&txq->axq_lock); +- + if (sendbar) + ath_send_bar(tid, tid->seq_start); + } +@@ -254,9 +249,7 @@ static void ath_tid_drain(struct ath_sof + bf = fi->bf; + + if (!bf) { +- spin_unlock(&txq->axq_lock); + ath_tx_complete(sc, skb, ATH_TX_ERROR, txq); +- spin_lock(&txq->axq_lock); + continue; + } + +@@ -265,9 +258,7 @@ static void ath_tid_drain(struct ath_sof + if (fi->retries) + ath_tx_update_baw(sc, tid, bf->bf_state.seqno); + +- spin_unlock(&txq->axq_lock); + ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); +- spin_lock(&txq->axq_lock); + } + + tid->seq_next = tid->seq_start; +@@ -525,9 +516,7 @@ static void ath_tx_complete_aggr(struct + * complete the acked-ones/xretried ones; update + * block-ack window + */ +- spin_lock_bh(&txq->axq_lock); + ath_tx_update_baw(sc, tid, seqno); +- spin_unlock_bh(&txq->axq_lock); + + if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { + memcpy(tx_info->control.rates, rates, sizeof(rates)); +@@ -550,9 +539,7 @@ static void ath_tx_complete_aggr(struct + * run out of tx buf. + */ + if (!tbf) { +- spin_lock_bh(&txq->axq_lock); + ath_tx_update_baw(sc, tid, seqno); +- spin_unlock_bh(&txq->axq_lock); + + ath_tx_complete_buf(sc, bf, txq, + &bf_head, ts, 0); +@@ -582,7 +569,6 @@ static void ath_tx_complete_aggr(struct + if (an->sleeping) + ieee80211_sta_set_buffered(sta, tid->tidno, true); + +- spin_lock_bh(&txq->axq_lock); + skb_queue_splice(&bf_pending, &tid->buf_q); + if (!an->sleeping) { + ath_tx_queue_tid(txq, tid); +@@ -590,7 +576,6 @@ static void ath_tx_complete_aggr(struct + if (ts->ts_status & ATH9K_TXERR_FILT) + tid->ac->clear_ps_filter = true; + } +- spin_unlock_bh(&txq->axq_lock); + } + + if (tid->state & AGGR_CLEANUP) +@@ -1190,9 +1175,9 @@ void ath_tx_aggr_stop(struct ath_softc * + txtid->state |= AGGR_CLEANUP; + else + txtid->state &= ~AGGR_ADDBA_COMPLETE; +- spin_unlock_bh(&txq->axq_lock); + + ath_tx_flush_tid(sc, txtid); ++ spin_unlock_bh(&txq->axq_lock); + } + + void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc, +@@ -1434,8 +1419,6 @@ static bool bf_is_ampdu_not_probing(stru + + static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq, + struct list_head *list, bool retry_tx) +- __releases(txq->axq_lock) +- __acquires(txq->axq_lock) + { + struct ath_buf *bf, *lastbf; + struct list_head bf_head; +@@ -1462,13 +1445,11 @@ static void ath_drain_txq_list(struct at + if (bf_is_ampdu_not_probing(bf)) + txq->axq_ampdu_depth--; + +- 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); +- spin_lock_bh(&txq->axq_lock); + } + } + +@@ -1847,8 +1828,6 @@ static void ath_tx_start_dma(struct ath_ + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_buf *bf; + +- spin_lock_bh(&txctl->txq->axq_lock); +- + if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) { + /* + * Try aggregation if it's a unicast data frame +@@ -1858,7 +1837,7 @@ static void ath_tx_start_dma(struct ath_ + } else { + bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb); + if (!bf) +- goto out; ++ return; + + bf->bf_state.bfs_paprd = txctl->paprd; + +@@ -1867,9 +1846,6 @@ static void ath_tx_start_dma(struct ath_ + + ath_tx_send_normal(sc, txctl->txq, tid, skb); + } +- +-out: +- spin_unlock_bh(&txctl->txq->axq_lock); + } + + /* Upon failure caller should free skb */ +@@ -1949,15 +1925,19 @@ int ath_tx_start(struct ieee80211_hw *hw + */ + + q = skb_get_queue_mapping(skb); ++ + spin_lock_bh(&txq->axq_lock); ++ + if (txq == sc->tx.txq_map[q] && + ++txq->pending_frames > ATH_MAX_QDEPTH && !txq->stopped) { + ieee80211_stop_queue(sc->hw, q); + txq->stopped = 1; + } +- spin_unlock_bh(&txq->axq_lock); + + ath_tx_start_dma(sc, skb, txctl, tid); ++ ++ spin_unlock_bh(&txq->axq_lock); ++ + return 0; + } + +@@ -2003,7 +1983,6 @@ static void ath_tx_complete(struct ath_s + + q = skb_get_queue_mapping(skb); + if (txq == sc->tx.txq_map[q]) { +- spin_lock_bh(&txq->axq_lock); + if (WARN_ON(--txq->pending_frames < 0)) + txq->pending_frames = 0; + +@@ -2011,7 +1990,6 @@ static void ath_tx_complete(struct ath_s + ieee80211_wake_queue(sc->hw, q); + txq->stopped = 0; + } +- spin_unlock_bh(&txq->axq_lock); + } + + ieee80211_tx_status(hw, skb); +@@ -2117,8 +2095,6 @@ static void ath_tx_rc_status(struct ath_ + 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) +- __releases(txq->axq_lock) +- __acquires(txq->axq_lock) + { + int txok; + +@@ -2128,16 +2104,12 @@ static void ath_tx_process_buffer(struct + if (bf_is_ampdu_not_probing(bf)) + txq->axq_ampdu_depth--; + +- spin_unlock_bh(&txq->axq_lock); +- + if (!bf_isampdu(bf)) { + ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok); + ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok); + } 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); + } +@@ -2281,6 +2253,7 @@ void ath_tx_edma_tasklet(struct ath_soft + struct list_head bf_head; + int status; + ++ spin_lock_bh(&txq->axq_lock); + for (;;) { + if (work_pending(&sc->hw_reset_work)) + break; +@@ -2300,12 +2273,8 @@ void ath_tx_edma_tasklet(struct ath_soft + + txq = &sc->tx.txq[ts.qid]; + +- spin_lock_bh(&txq->axq_lock); +- +- if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { +- spin_unlock_bh(&txq->axq_lock); +- return; +- } ++ if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) ++ break; + + bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], + struct ath_buf, list); +@@ -2329,8 +2298,8 @@ void ath_tx_edma_tasklet(struct ath_soft + } + + ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); +- spin_unlock_bh(&txq->axq_lock); + } ++ spin_unlock_bh(&txq->axq_lock); + } + + /*****************/ |