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authorFelix Fietkau <nbd@nbd.name>2017-02-02 12:02:22 +0100
committerFelix Fietkau <nbd@nbd.name>2017-02-06 12:27:12 +0100
commit649e766a64a0d001f040dfc225c601b3d0af6f40 (patch)
tree6399891552e85e9d511546df07932551f60b7549 /package/kernel/mac80211/patches/305-ath9k-limit-retries-for-powersave-response-frames.patch
parent91fce81df6e99cec0876b9d4866bd86e7c49820f (diff)
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mac80211: update to wireless-testing 2017-01-31
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'package/kernel/mac80211/patches/305-ath9k-limit-retries-for-powersave-response-frames.patch')
-rw-r--r--package/kernel/mac80211/patches/305-ath9k-limit-retries-for-powersave-response-frames.patch96
1 files changed, 96 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/305-ath9k-limit-retries-for-powersave-response-frames.patch b/package/kernel/mac80211/patches/305-ath9k-limit-retries-for-powersave-response-frames.patch
new file mode 100644
index 0000000..5923594
--- /dev/null
+++ b/package/kernel/mac80211/patches/305-ath9k-limit-retries-for-powersave-response-frames.patch
@@ -0,0 +1,96 @@
+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
+@@ -188,10 +188,25 @@ 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,
+@@ -1522,7 +1537,7 @@ ath_tx_form_burst(struct ath_softc *sc,
+ break;
+ }
+
+- ath_set_rates(tid->an->vif, tid->an->sta, bf);
++ ath_set_rates(tid->an->vif, tid->an->sta, bf, false);
+ } while (1);
+ }
+
+@@ -1552,7 +1567,7 @@ 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)
+ aggr_len = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf);
+ else
+@@ -1710,7 +1725,7 @@ void ath9k_release_buffered_frames(struc
+ break;
+
+ 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;
+@@ -2410,7 +2425,7 @@ 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:
+@@ -2449,7 +2464,7 @@ 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)
+@@ -2968,7 +2983,7 @@ 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);