ath9k: improve PS filter clearing and retry counting for A-MPDU

Do not increment the retry counter if packets to a sleeping station
were not sent because of tx failure, instead of only checking the filter
flag.
Clear the PS filter only after an A-MPDU was reported as filtered,
otherwise the hardware might do some unnecessary extra retransmissions.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 7c4dae2..9903fc3 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -373,7 +373,6 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
        struct ath_frame_info *fi;
        int nframes;
        u8 tidno;
-       bool clear_filter;
 
        skb = bf->bf_mpdu;
        hdr = (struct ieee80211_hdr *)skb->data;
@@ -463,11 +462,9 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                                 */
                                txfail = 1;
                        } else if (fi->retries < ATH_MAX_SW_RETRIES) {
-                               if (!(ts->ts_status & ATH9K_TXERR_FILT) ||
-                                   !an->sleeping)
+                               if (txok || !an->sleeping)
                                        ath_tx_set_retry(sc, txq, bf->bf_mpdu);
 
-                               clear_filter = true;
                                txpending = 1;
                        } else {
                                txfail = 1;
@@ -545,11 +542,13 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                        ieee80211_sta_set_buffered(sta, tid->tidno, true);
 
                spin_lock_bh(&txq->axq_lock);
-               if (clear_filter)
-                       tid->ac->clear_ps_filter = true;
                skb_queue_splice(&bf_pending, &tid->buf_q);
-               if (!an->sleeping)
+               if (!an->sleeping) {
                        ath_tx_queue_tid(txq, tid);
+
+                       if (ts->ts_status & ATH9K_TXERR_FILT)
+                               tid->ac->clear_ps_filter = true;
+               }
                spin_unlock_bh(&txq->axq_lock);
        }