122 lines
3.6 KiB
Diff
122 lines
3.6 KiB
Diff
From: Felix Fietkau <nbd@openwrt.org>
|
|
Date: Thu, 2 Jul 2015 15:20:56 +0200
|
|
Subject: [PATCH] ath9k: limit retries for powersave response frames
|
|
|
|
In some cases, the channel might be busy enough that an ath9k AP's
|
|
response to PS-Poll frames might be too slow and the station has already
|
|
gone to sleep. To avoid wasting too much airtime on this, limit the
|
|
number of retries on such frames and ensure that no sample rate gets
|
|
used.
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
|
|
---
|
|
|
|
--- a/drivers/net/wireless/ath/ath9k/xmit.c
|
|
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
|
|
@@ -136,10 +136,25 @@ static void ath_send_bar(struct ath_atx_
|
|
}
|
|
|
|
static void ath_set_rates(struct ieee80211_vif *vif, struct ieee80211_sta *sta,
|
|
- struct ath_buf *bf)
|
|
+ struct ath_buf *bf, bool ps)
|
|
{
|
|
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(bf->bf_mpdu);
|
|
+
|
|
+ if (ps) {
|
|
+ /* Clear the first rate to avoid using a sample rate for PS frames */
|
|
+ info->control.rates[0].idx = -1;
|
|
+ info->control.rates[0].count = 0;
|
|
+ }
|
|
+
|
|
ieee80211_get_tx_rates(vif, sta, bf->bf_mpdu, bf->rates,
|
|
ARRAY_SIZE(bf->rates));
|
|
+ if (!ps)
|
|
+ return;
|
|
+
|
|
+ if (bf->rates[0].count > 2)
|
|
+ bf->rates[0].count = 2;
|
|
+
|
|
+ bf->rates[1].idx = -1;
|
|
}
|
|
|
|
static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq,
|
|
@@ -1419,7 +1434,7 @@ ath_tx_form_burst(struct ath_softc *sc,
|
|
if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
|
|
break;
|
|
|
|
- ath_set_rates(tid->an->vif, tid->an->sta, bf);
|
|
+ ath_set_rates(tid->an->vif, tid->an->sta, bf, false);
|
|
} while (1);
|
|
}
|
|
|
|
@@ -1450,7 +1465,7 @@ static bool ath_tx_sched_aggr(struct ath
|
|
return false;
|
|
}
|
|
|
|
- ath_set_rates(tid->an->vif, tid->an->sta, bf);
|
|
+ ath_set_rates(tid->an->vif, tid->an->sta, bf, false);
|
|
if (aggr)
|
|
last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf,
|
|
tid_q, &aggr_len);
|
|
@@ -1647,7 +1662,7 @@ void ath9k_release_buffered_frames(struc
|
|
|
|
__skb_unlink(bf->bf_mpdu, tid_q);
|
|
list_add_tail(&bf->list, &bf_q);
|
|
- ath_set_rates(tid->an->vif, tid->an->sta, bf);
|
|
+ ath_set_rates(tid->an->vif, tid->an->sta, bf, true);
|
|
if (bf_isampdu(bf)) {
|
|
ath_tx_addto_baw(sc, tid, bf);
|
|
bf->bf_state.bf_type &= ~BUF_AGGR;
|
|
@@ -2293,7 +2308,7 @@ int ath_tx_start(struct ieee80211_hw *hw
|
|
struct ath_txq *txq = txctl->txq;
|
|
struct ath_atx_tid *tid = NULL;
|
|
struct ath_buf *bf;
|
|
- bool queue, skip_uapsd = false, ps_resp;
|
|
+ bool queue, ps_resp;
|
|
int q, ret;
|
|
|
|
if (vif)
|
|
@@ -2346,13 +2361,13 @@ int ath_tx_start(struct ieee80211_hw *hw
|
|
if (!txctl->an)
|
|
txctl->an = &avp->mcast_node;
|
|
queue = true;
|
|
- skip_uapsd = true;
|
|
+ ps_resp = false;
|
|
}
|
|
|
|
if (txctl->an && queue)
|
|
tid = ath_get_skb_tid(sc, txctl->an, skb);
|
|
|
|
- if (!skip_uapsd && ps_resp) {
|
|
+ if (ps_resp) {
|
|
ath_txq_unlock(sc, txq);
|
|
txq = sc->tx.uapsdq;
|
|
ath_txq_lock(sc, txq);
|
|
@@ -2390,7 +2405,7 @@ int ath_tx_start(struct ieee80211_hw *hw
|
|
if (txctl->paprd)
|
|
bf->bf_state.bfs_paprd_timestamp = jiffies;
|
|
|
|
- ath_set_rates(vif, sta, bf);
|
|
+ ath_set_rates(vif, sta, bf, ps_resp);
|
|
ath_tx_send_normal(sc, txq, tid, skb);
|
|
|
|
out:
|
|
@@ -2429,7 +2444,7 @@ void ath_tx_cabq(struct ieee80211_hw *hw
|
|
break;
|
|
|
|
bf->bf_lastbf = bf;
|
|
- ath_set_rates(vif, NULL, bf);
|
|
+ ath_set_rates(vif, NULL, bf, false);
|
|
ath_buf_set_rate(sc, bf, &info, fi->framelen, false);
|
|
duration += info.rates[0].PktDuration;
|
|
if (bf_tail)
|
|
@@ -2932,7 +2947,7 @@ int ath9k_tx99_send(struct ath_softc *sc
|
|
return -EINVAL;
|
|
}
|
|
|
|
- ath_set_rates(sc->tx99_vif, NULL, bf);
|
|
+ ath_set_rates(sc->tx99_vif, NULL, bf, false);
|
|
|
|
ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, bf->bf_daddr);
|
|
ath9k_hw_tx99_start(sc->sc_ah, txctl->txq->axq_qnum);
|