From ae6fc0e4bd8739875d1a1527f323a1ae9df79c5a Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 29 Jun 2013 12:38:15 +0000
Subject: ath9k: fix tx queue pending frame counter when dropping packets
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 37081
---
.../557-ath9k_fix_tx_queue_accounting.patch | 95 ++++++++++++++++++++++
1 file changed, 95 insertions(+)
create mode 100644 package/kernel/mac80211/patches/557-ath9k_fix_tx_queue_accounting.patch
diff --git a/package/kernel/mac80211/patches/557-ath9k_fix_tx_queue_accounting.patch b/package/kernel/mac80211/patches/557-ath9k_fix_tx_queue_accounting.patch
new file mode 100644
index 0000000000..83dcdceda3
--- /dev/null
+++ b/package/kernel/mac80211/patches/557-ath9k_fix_tx_queue_accounting.patch
@@ -0,0 +1,95 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -146,6 +146,28 @@ static void ath_set_rates(struct ieee802
+ ARRAY_SIZE(bf->rates));
+ }
+
++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];
++
++ if (txq != sc->tx.txq_map[q])
++ return;
++
++ if (WARN_ON(--txq->pending_frames < 0))
++ txq->pending_frames = 0;
++
++ if (txq->stopped &&
++ txq->pending_frames < sc->tx.txq_max_pending[q]) {
++ ieee80211_wake_queue(sc->hw, q);
++ txq->stopped = false;
++ }
++}
++
+ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
+ {
+ struct ath_txq *txq = tid->ac->txq;
+@@ -167,6 +189,7 @@ static void ath_tx_flush_tid(struct ath_
+ if (!bf) {
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+ if (!bf) {
++ ath_txq_skb_done(sc, txq, skb);
+ ieee80211_free_txskb(sc->hw, skb);
+ continue;
+ }
+@@ -811,6 +834,7 @@ ath_tx_get_tid_subframe(struct ath_softc
+
+ if (!bf) {
+ __skb_unlink(skb, &tid->buf_q);
++ ath_txq_skb_done(sc, txq, skb);
+ ieee80211_free_txskb(sc->hw, skb);
+ continue;
+ }
+@@ -1824,6 +1848,7 @@ static void ath_tx_send_ampdu(struct ath
+
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+ if (!bf) {
++ ath_txq_skb_done(sc, txq, skb);
+ ieee80211_free_txskb(sc->hw, skb);
+ return;
+ }
+@@ -2090,6 +2115,7 @@ int ath_tx_start(struct ieee80211_hw *hw
+
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+ if (!bf) {
++ ath_txq_skb_done(sc, txq, skb);
+ if (txctl->paprd)
+ dev_kfree_skb_any(skb);
+ else
+@@ -2189,7 +2215,7 @@ static void ath_tx_complete(struct ath_s
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
+- int q, padpos, padsize;
++ int padpos, padsize;
+ unsigned long flags;
+
+ ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb);
+@@ -2225,21 +2251,7 @@ static void ath_tx_complete(struct ath_s
+ spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+
+ __skb_queue_tail(&txq->complete_q, skb);
+-
+- q = skb_get_queue_mapping(skb);
+- if (txq == sc->tx.uapsdq)
+- txq = sc->tx.txq_map[q];
+-
+- if (txq == sc->tx.txq_map[q]) {
+- if (WARN_ON(--txq->pending_frames < 0))
+- txq->pending_frames = 0;
+-
+- if (txq->stopped &&
+- txq->pending_frames < sc->tx.txq_max_pending[q]) {
+- ieee80211_wake_queue(sc->hw, q);
+- txq->stopped = false;
+- }
+- }
++ ath_txq_skb_done(sc, txq, skb);
+ }
+
+ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
--
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