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6e4fb77f9e
several people reported this bug to be causing drop out issues
Signed-off-by: John Crispin <john@phrozen.org>
(cherry picked from commit cac1a4be66)
115 lines
3.4 KiB
Diff
115 lines
3.4 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 30 Aug 2016 12:44:08 +0200
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Subject: [PATCH] ath9k: fix block-ack window tracking issues
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Ensure that a buffer gets tracked as part of the block-ack window as
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soon as it's dequeued from the tid for the first time. Ensure that
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double calls to ath_tx_addto_baw (e.g. on retransmission) don't cause
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any issues.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/wireless/ath/ath9k/xmit.c
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+++ b/drivers/net/wireless/ath/ath9k/xmit.c
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@@ -62,7 +62,7 @@ static void ath_tx_rc_status(struct ath_
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struct ath_tx_status *ts, int nframes, int nbad,
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int txok);
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static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
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- int seqno);
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+ struct ath_buf *bf);
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static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
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struct ath_txq *txq,
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struct ath_atx_tid *tid,
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@@ -296,7 +296,7 @@ static void ath_tx_flush_tid(struct ath_
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}
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if (fi->baw_tracked) {
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- ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
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+ ath_tx_update_baw(sc, tid, bf);
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sendbar = true;
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}
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@@ -312,10 +312,15 @@ static void ath_tx_flush_tid(struct ath_
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}
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static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
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- int seqno)
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+ struct ath_buf *bf)
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{
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+ struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
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+ u16 seqno = bf->bf_state.seqno;
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int index, cindex;
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+ if (!fi->baw_tracked)
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+ return;
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+
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index = ATH_BA_INDEX(tid->seq_start, seqno);
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cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
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@@ -336,6 +341,9 @@ static void ath_tx_addto_baw(struct ath_
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u16 seqno = bf->bf_state.seqno;
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int index, cindex;
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+ if (fi->baw_tracked)
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+ return;
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+
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index = ATH_BA_INDEX(tid->seq_start, seqno);
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cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
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__set_bit(cindex, tid->tx_buf);
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@@ -612,7 +620,7 @@ static void ath_tx_complete_aggr(struct
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* complete the acked-ones/xretried ones; update
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* block-ack window
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*/
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- ath_tx_update_baw(sc, tid, seqno);
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+ ath_tx_update_baw(sc, tid, bf);
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if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
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memcpy(tx_info->control.rates, rates, sizeof(rates));
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@@ -642,7 +650,7 @@ static void ath_tx_complete_aggr(struct
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* run out of tx buf.
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*/
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if (!tbf) {
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- ath_tx_update_baw(sc, tid, seqno);
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+ ath_tx_update_baw(sc, tid, bf);
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ath_tx_complete_buf(sc, bf, txq,
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&bf_head, NULL, ts,
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@@ -1011,11 +1019,14 @@ ath_tx_get_tid_subframe(struct ath_softc
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INIT_LIST_HEAD(&bf_head);
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list_add(&bf->list, &bf_head);
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- ath_tx_update_baw(sc, tid, seqno);
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+ ath_tx_update_baw(sc, tid, bf);
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ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
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continue;
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}
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+ if (bf_isampdu(bf))
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+ ath_tx_addto_baw(sc, tid, bf);
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+
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return bf;
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}
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@@ -1073,8 +1084,6 @@ ath_tx_form_aggr(struct ath_softc *sc, s
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bf->bf_next = NULL;
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/* link buffers of this frame to the aggregate */
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- if (!fi->baw_tracked)
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- ath_tx_addto_baw(sc, tid, bf);
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bf->bf_state.ndelim = ndelim;
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list_add_tail(&bf->list, bf_q);
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@@ -1710,10 +1719,8 @@ void ath9k_release_buffered_frames(struc
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ath9k_set_moredata(sc, bf, true);
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list_add_tail(&bf->list, &bf_q);
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ath_set_rates(tid->an->vif, tid->an->sta, bf);
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- if (bf_isampdu(bf)) {
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- ath_tx_addto_baw(sc, tid, bf);
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+ if (bf_isampdu(bf))
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bf->bf_state.bf_type &= ~BUF_AGGR;
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- }
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if (bf_tail)
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bf_tail->bf_next = bf;
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