ath9k: add experimental patch

patches/openwrt/0029-ath9k-add-experimental-patch.patch

+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Tue, 15 Jul 2014 20:08:17 +0200
+Subject: ath9k: add experimental patch
+
+diff --git a/package/mac80211/patches/950-ath9k-txq.patch b/package/mac80211/patches/950-ath9k-txq.patch
+new file mode 100644
+index 0000000..0aa3149
+--- /dev/null
++++ b/package/mac80211/patches/950-ath9k-txq.patch
+@@ -0,0 +1,69 @@
++--- 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))