diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/xmit.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/xmit.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index eaaeb937fa1..8785ec3b1cb 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -1968,6 +1968,8 @@ static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); struct ieee80211_hw *hw = bf->aphy->hw; + struct ath_softc *sc = bf->aphy->sc; + struct ath_hw *ah = sc->sc_ah; u8 i, tx_rateindex; if (txok) @@ -1989,11 +1991,24 @@ static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { - if (ieee80211_is_data(hdr->frame_control)) { - if (ts->ts_flags & - (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN)) - tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN; - } + /* + * If an underrun error is seen assume it as an excessive + * retry only if max frame trigger level has been reached + * (2 KB for single stream, and 4 KB for dual stream). + * Adjust the long retry as if the frame was tried + * hw->max_rate_tries times to affect how rate control updates + * PER for the failed rate. + * In case of congestion on the bus penalizing this type of + * underruns should help hardware actually transmit new frames + * successfully by eventually preferring slower rates. + * This itself should also alleviate congestion on the bus. + */ + if (ieee80211_is_data(hdr->frame_control) && + (ts->ts_flags & (ATH9K_TX_DATA_UNDERRUN | + ATH9K_TX_DELIM_UNDERRUN)) && + ah->tx_trig_level >= sc->sc_ah->caps.tx_triglevel_max) + tx_info->status.rates[tx_rateindex].count = + hw->max_rate_tries; } for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |