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ath9k: add a fix for tx pending frame accounting, fixes some tx hang issues

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 41673
This commit is contained in:
Felix Fietkau 2014-07-16 18:26:21 +00:00
parent 4beb468f11
commit 952c87aeeb
2 changed files with 90 additions and 3 deletions
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87
package/kernel/mac80211/patches/300-pending_work.patch
View File

@ -1,3 +1,21 @@
commit c0ee7fa4c0da824ccccc172bf175fb1f86540921
Author: Felix Fietkau <nbd@openwrt.org>
Date: Wed Jul 16 18:00:31 2014 +0200
ath9k: fix pending tx frames accounting
Packets originally buffered for the regular hardware tx queues can end
up being transmitted through the U-APSD queue (via PS-Poll or U-APSD).
When packets are dropped due to retransmit failures, the pending frames
counter is not always updated properly.
Fix this by keeping track of the queue that a frame was accounted for in
the ath_frame_info struct, and using that on completion to decide
whether the counter should be updated.
This fixes some spurious transmit queue hangs.
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
commit edcdf0989410a05a6a4b8438df4010447eaa7d9a
Author: Felix Fietkau <nbd@openwrt.org>
Date: Sun Jun 22 13:36:20 2014 +0200
@ -2920,3 +2938,72 @@ Date: Mon May 19 21:20:49 2014 +0200
if (max_bandwidth_khz < MHZ_TO_KHZ(80))
bw_flags |= IEEE80211_CHAN_NO_80MHZ;
if (max_bandwidth_khz < MHZ_TO_KHZ(160))
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -185,7 +185,8 @@ struct ath_atx_ac {
struct ath_frame_info {
struct ath_buf *bf;
- int framelen;
+ u16 framelen;
+ s8 txq;
enum ath9k_key_type keytype;
u8 keyix;
u8 rtscts_rate;
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -147,15 +147,13 @@ static void ath_set_rates(struct ieee802
static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq,
struct sk_buff *skb)
{
- int q;
-
- q = skb_get_queue_mapping(skb);
- if (txq == sc->tx.uapsdq)
- txq = sc->tx.txq_map[q];
+ struct ath_frame_info *fi = get_frame_info(skb);
+ int q = fi->txq;
- if (txq != sc->tx.txq_map[q])
+ if (q < 0)
return;
+ txq = sc->tx.txq_map[q];
if (WARN_ON(--txq->pending_frames < 0))
txq->pending_frames = 0;
@@ -1999,6 +1997,7 @@ static void setup_frame_info(struct ieee
an = (struct ath_node *) sta->drv_priv;
memset(fi, 0, sizeof(*fi));
+ fi->txq = -1;
if (hw_key)
fi->keyix = hw_key->hw_key_idx;
else if (an && ieee80211_is_data(hdr->frame_control) && an->ps_key > 0)
@@ -2150,6 +2149,7 @@ int ath_tx_start(struct ieee80211_hw *hw
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_sta *sta = txctl->sta;
struct ieee80211_vif *vif = info->control.vif;
+ struct ath_frame_info *fi = get_frame_info(skb);
struct ath_softc *sc = hw->priv;
struct ath_txq *txq = txctl->txq;
struct ath_atx_tid *tid = NULL;
@@ -2170,11 +2170,13 @@ int ath_tx_start(struct ieee80211_hw *hw
q = skb_get_queue_mapping(skb);
ath_txq_lock(sc, txq);
- if (txq == sc->tx.txq_map[q] &&
- ++txq->pending_frames > sc->tx.txq_max_pending[q] &&
- !txq->stopped) {
- ieee80211_stop_queue(sc->hw, q);
- txq->stopped = true;
+ if (txq == sc->tx.txq_map[q]) {
+ fi->txq = q;
+ if (++txq->pending_frames > sc->tx.txq_max_pending[q] &&
+ !txq->stopped) {
+ ieee80211_stop_queue(sc->hw, q);
+ txq->stopped = true;
+ }
}
if (txctl->an && ieee80211_is_data_present(hdr->frame_control))

6
package/kernel/mac80211/patches/530-ath9k_extra_leds.patch
View File

@ -1,6 +1,6 @@
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -564,6 +564,9 @@ static inline int ath9k_dump_btcoex(stru
@@ -565,6 +565,9 @@ static inline int ath9k_dump_btcoex(stru
void ath_init_leds(struct ath_softc *sc);
void ath_deinit_leds(struct ath_softc *sc);
void ath_fill_led_pin(struct ath_softc *sc);
@ -10,7 +10,7 @@
#else
static inline void ath_init_leds(struct ath_softc *sc)
{
@@ -702,6 +705,13 @@ void ath_ant_comb_scan(struct ath_softc
@@ -703,6 +706,13 @@ void ath_ant_comb_scan(struct ath_softc
#define PS_BEACON_SYNC BIT(4)
#define PS_WAIT_FOR_ANI BIT(5)
@ -24,7 +24,7 @@
struct ath_softc {
struct ieee80211_hw *hw;
struct device *dev;
@@ -744,9 +754,8 @@ struct ath_softc {
@@ -745,9 +755,8 @@ struct ath_softc {
struct ath_beacon beacon;
#ifdef CPTCFG_MAC80211_LEDS