openwrt-xburst/package/mac80211/patches/530-ath9k_cleanup.patch

--- a/drivers/net/wireless/ath/ath9k/common.h
+++ b/drivers/net/wireless/ath/ath9k/common.h
@@ -81,6 +81,7 @@ struct ath_buf {
 	u16 bf_flags;
 	struct ath_buf_state bf_state;
 	dma_addr_t bf_dmacontext;
+	struct ath_wiphy *aphy;
 };
 
 struct ath_atx_tid {
--- a/drivers/net/wireless/ath/ath9k/rc.h
+++ b/drivers/net/wireless/ath/ath9k/rc.h
@@ -167,24 +167,18 @@ struct ath_rate_priv {
 	struct ath_rate_softc *asc;
 };
 
+#define ATH_TX_INFO_FRAME_TYPE_INTERNAL	(1 << 0)
+#define ATH_TX_INFO_FRAME_TYPE_PAUSE	(1 << 1)
+#define ATH_TX_INFO_UPDATE_RC		(1 << 2)
+#define ATH_TX_INFO_XRETRY		(1 << 3)
+#define ATH_TX_INFO_UNDERRUN		(1 << 4)
+
 enum ath9k_internal_frame_type {
 	ATH9K_NOT_INTERNAL,
 	ATH9K_INT_PAUSE,
 	ATH9K_INT_UNPAUSE
 };
 
-struct ath_tx_info_priv {
-	struct ath_wiphy *aphy;
-	struct ath_tx_status tx;
-	int n_frames;
-	int n_bad_frames;
-	bool update_rc;
-	enum ath9k_internal_frame_type frame_type;
-};
-
-#define ATH_TX_INFO_PRIV(tx_info) \
-	((struct ath_tx_info_priv *)((tx_info)->rate_driver_data[0]))
-
 void ath_rate_attach(struct ath_softc *sc);
 u8 ath_rate_findrateix(struct ath_softc *sc, u8 dot11_rate);
 int ath_rate_control_register(void);
--- a/drivers/net/wireless/ath/ath9k/virtual.c
+++ b/drivers/net/wireless/ath/ath9k/virtual.c
@@ -338,13 +338,11 @@ void ath9k_wiphy_chan_work(struct work_s
 void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
 	struct ath_wiphy *aphy = hw->priv;
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 
-	if (tx_info_priv && tx_info_priv->frame_type == ATH9K_INT_PAUSE &&
+	if ((tx_info->driver_flags & ATH_TX_INFO_FRAME_TYPE_PAUSE) &&
 	    aphy->state == ATH_WIPHY_PAUSING) {
-		if (!(info->flags & IEEE80211_TX_STAT_ACK)) {
+		if (!(tx_info->flags & IEEE80211_TX_STAT_ACK)) {
 			printk(KERN_DEBUG "ath9k: %s: no ACK for pause "
 			       "frame\n", wiphy_name(hw->wiphy));
 			/*
@@ -363,9 +361,6 @@ void ath9k_tx_status(struct ieee80211_hw
 		}
 	}
 
-	kfree(tx_info_priv);
-	tx_info->rate_driver_data[0] = NULL;
-
 	dev_kfree_skb(skb);
 }
 
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -251,6 +251,7 @@ static struct ath_buf* ath_clone_txbuf(s
 
 	ATH_TXBUF_RESET(tbf);
 
+	tbf->aphy = bf->aphy;
 	tbf->bf_mpdu = bf->bf_mpdu;
 	tbf->bf_buf_addr = bf->bf_buf_addr;
 	*(tbf->bf_desc) = *(bf->bf_desc);
@@ -270,7 +271,6 @@ static void ath_tx_complete_aggr(struct 
 	struct ieee80211_hw *hw;
 	struct ieee80211_hdr *hdr;
 	struct ieee80211_tx_info *tx_info;
-	struct ath_tx_info_priv *tx_info_priv;
 	struct ath_atx_tid *tid = NULL;
 	struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
 	struct ath_desc *ds = bf_last->bf_desc;
@@ -284,8 +284,7 @@ static void ath_tx_complete_aggr(struct 
 	hdr = (struct ieee80211_hdr *)skb->data;
 
 	tx_info = IEEE80211_SKB_CB(skb);
-	tx_info_priv = (struct ath_tx_info_priv *) tx_info->rate_driver_data[0];
-	hw = tx_info_priv->aphy->hw;
+	hw = bf->aphy->hw;
 
 	rcu_read_lock();
 
@@ -464,7 +463,6 @@ static u32 ath_lookup_rate(struct ath_so
 	struct sk_buff *skb;
 	struct ieee80211_tx_info *tx_info;
 	struct ieee80211_tx_rate *rates;
-	struct ath_tx_info_priv *tx_info_priv;
 	u32 max_4ms_framelen, frmlen;
 	u16 aggr_limit, legacy = 0;
 	int i;
@@ -472,7 +470,6 @@ static u32 ath_lookup_rate(struct ath_so
 	skb = bf->bf_mpdu;
 	tx_info = IEEE80211_SKB_CB(skb);
 	rates = tx_info->control.rates;
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->rate_driver_data[0];
 
 	/*
 	 * Find the lowest frame length among the rate series that will have a
@@ -1560,21 +1557,26 @@ static int ath_tx_setup_buffer(struct ie
 	struct ath_softc *sc = aphy->sc;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct ath_tx_info_priv *tx_info_priv;
 	int hdrlen;
 	__le16 fc;
 
-	tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC);
-	if (unlikely(!tx_info_priv))
-		return -ENOMEM;
-	tx_info->rate_driver_data[0] = tx_info_priv;
-	tx_info_priv->aphy = aphy;
-	tx_info_priv->frame_type = txctl->frame_type;
+	tx_info->driver_flags = 0;
+	switch (txctl->frame_type) {
+	case ATH9K_NOT_INTERNAL:
+		break;
+	case ATH9K_INT_PAUSE:
+		tx_info->driver_flags |= ATH_TX_INFO_FRAME_TYPE_PAUSE;
+		/* fall through */
+	case ATH9K_INT_UNPAUSE:
+		tx_info->driver_flags |= ATH_TX_INFO_FRAME_TYPE_INTERNAL;
+		break;
+	}
 	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 	fc = hdr->frame_control;
 
 	ATH_TXBUF_RESET(bf);
 
+	bf->aphy = aphy;
 	bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3);
 
 	if (conf_is_ht(&hw->conf) && !is_pae(skb))
@@ -1599,8 +1601,6 @@ static int ath_tx_setup_buffer(struct ie
 					   skb->len, DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) {
 		bf->bf_mpdu = NULL;
-		kfree(tx_info_priv);
-		tx_info->rate_driver_data[0] = NULL;
 		ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
 			  "dma_mapping_error() on TX\n");
 		return -ENOMEM;
@@ -1781,27 +1781,17 @@ exit:
 /*****************/
 
 static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
-			    int tx_flags)
+			    struct ath_wiphy *aphy, int tx_flags)
 {
 	struct ieee80211_hw *hw = sc->hw;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	int hdrlen, padsize;
-	int frame_type = ATH9K_NOT_INTERNAL;
 
 	ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
 
-	if (tx_info_priv) {
-		hw = tx_info_priv->aphy->hw;
-		frame_type = tx_info_priv->frame_type;
-	}
-
-	if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
-	    tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
-		kfree(tx_info_priv);
-		tx_info->rate_driver_data[0] = NULL;
-	}
+	if (aphy)
+		hw = aphy->hw;
 
 	if (tx_flags & ATH_TX_BAR)
 		tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
@@ -1833,10 +1823,10 @@ static void ath_tx_complete(struct ath_s
 					SC_OP_WAIT_FOR_TX_ACK));
 	}
 
-	if (frame_type == ATH9K_NOT_INTERNAL)
-		ieee80211_tx_status(hw, skb);
-	else
+	if (unlikely(tx_info->driver_flags & ATH_TX_INFO_FRAME_TYPE_INTERNAL))
 		ath9k_tx_status(hw, skb);
+	else
+		ieee80211_tx_status(hw, skb);
 }
 
 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
@@ -1859,7 +1849,7 @@ static void ath_tx_complete_buf(struct a
 	}
 
 	dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
-	ath_tx_complete(sc, skb, tx_flags);
+	ath_tx_complete(sc, skb, bf->aphy, tx_flags);
 	ath_debug_stat_tx(sc, txq, bf);
 
 	/*
@@ -1907,8 +1897,7 @@ static void ath_tx_rc_status(struct ath_
 	struct sk_buff *skb = bf->bf_mpdu;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
-	struct ieee80211_hw *hw = tx_info_priv->aphy->hw;
+	struct ieee80211_hw *hw = bf->aphy->hw;
 	u8 i, tx_rateindex;
 
 	if (txok)
@@ -1917,17 +1906,22 @@ static void ath_tx_rc_status(struct ath_
 	tx_rateindex = ds->ds_txstat.ts_rateindex;
 	WARN_ON(tx_rateindex >= hw->max_rates);
 
-	tx_info_priv->update_rc = update_rc;
+	if (update_rc)
+		tx_info->driver_flags |= ATH_TX_INFO_UPDATE_RC;
 	if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT)
 		tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 
 	if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 &&
 	    (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) {
 		if (ieee80211_is_data(hdr->frame_control)) {
-			memcpy(&tx_info_priv->tx, &ds->ds_txstat,
-			       sizeof(tx_info_priv->tx));
-			tx_info_priv->n_frames = bf->bf_nframes;
-			tx_info_priv->n_bad_frames = nbad;
+			if (ds->ds_txstat.ts_flags &
+			    (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN))
+				tx_info->driver_flags |= ATH_TX_INFO_UNDERRUN;
+			if ((ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY) ||
+			    (ds->ds_txstat.ts_status & ATH9K_TXERR_FIFO))
+				tx_info->driver_flags |= ATH_TX_INFO_XRETRY;
+			tx_info->ampdu_len = bf->bf_nframes;
+			tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad;
 		}
 	}
 
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -257,14 +257,17 @@ static const struct file_operations fops
 
 void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
 {
-	struct ath_tx_info_priv *tx_info_priv = NULL;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_tx_rate *rates = tx_info->status.rates;
-	int final_ts_idx, idx;
+	int final_ts_idx = 0, idx, i;
 	struct ath_rc_stats *stats;
 
-	tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
-	final_ts_idx = tx_info_priv->tx.ts_rateindex;
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		if (!rates[i].count)
+			break;
+
+		final_ts_idx = i;
+	}
 	idx = rates[final_ts_idx].idx;
 	stats = &sc->debug.stats.rcstats[idx];
 	stats->success++;
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -859,12 +859,12 @@ static void ath_get_rate(void *priv, str
 static bool ath_rc_update_per(struct ath_softc *sc,
 			      const struct ath_rate_table *rate_table,
 			      struct ath_rate_priv *ath_rc_priv,
-			      struct ath_tx_info_priv *tx_info_priv,
+				  struct ieee80211_tx_info *tx_info,
 			      int tx_rate, int xretries, int retries,
 			      u32 now_msec)
 {
 	bool state_change = false;
-	int count;
+	int count, n_bad_frames;
 	u8 last_per;
 	static u32 nretry_to_per_lookup[10] = {
 		100 * 0 / 1,
@@ -880,6 +880,7 @@ static bool ath_rc_update_per(struct ath
 	};
 
 	last_per = ath_rc_priv->per[tx_rate];
+	n_bad_frames = tx_info->ampdu_len - tx_info->status.ampdu_ack_len;
 
 	if (xretries) {
 		if (xretries == 1) {
@@ -907,7 +908,7 @@ static bool ath_rc_update_per(struct ath
 		if (retries >= count)
 			retries = count - 1;
 
-		if (tx_info_priv->n_bad_frames) {
+		if (n_bad_frames) {
 			/* new_PER = 7/8*old_PER + 1/8*(currentPER)
 			 * Assuming that n_frames is not 0.  The current PER
 			 * from the retries is 100 * retries / (retries+1),
@@ -920,14 +921,14 @@ static bool ath_rc_update_per(struct ath
 			 * the above PER.  The expression below is a
 			 * simplified version of the sum of these two terms.
 			 */
-			if (tx_info_priv->n_frames > 0) {
-				int n_frames, n_bad_frames;
+			if (tx_info->ampdu_len > 0) {
+				int n_frames, n_bad_tries;
 				u8 cur_per, new_per;
 
-				n_bad_frames = retries * tx_info_priv->n_frames +
-					tx_info_priv->n_bad_frames;
-				n_frames = tx_info_priv->n_frames * (retries + 1);
-				cur_per = (100 * n_bad_frames / n_frames) >> 3;
+				n_bad_tries = retries * tx_info->ampdu_len +
+					n_bad_frames;
+				n_frames = tx_info->ampdu_len * (retries + 1);
+				cur_per = (100 * n_bad_tries / n_frames) >> 3;
 				new_per = (u8)(last_per - (last_per >> 3) + cur_per);
 				ath_rc_priv->per[tx_rate] = new_per;
 			}
@@ -943,8 +944,7 @@ static bool ath_rc_update_per(struct ath
 		 * this was a probe.  Otherwise, ignore the probe.
 		 */
 		if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) {
-			if (retries > 0 || 2 * tx_info_priv->n_bad_frames >
-				tx_info_priv->n_frames) {
+			if (retries > 0 || 2 * n_bad_frames > tx_info->ampdu_len) {
 				/*
 				 * Since we probed with just a single attempt,
 				 * any retries means the probe failed.  Also,
@@ -1003,7 +1003,7 @@ static bool ath_rc_update_per(struct ath
 
 static void ath_rc_update_ht(struct ath_softc *sc,
 			     struct ath_rate_priv *ath_rc_priv,
-			     struct ath_tx_info_priv *tx_info_priv,
+			     struct ieee80211_tx_info *tx_info,
 			     int tx_rate, int xretries, int retries)
 {
 	u32 now_msec = jiffies_to_msecs(jiffies);
@@ -1020,7 +1020,7 @@ static void ath_rc_update_ht(struct ath_
 
 	/* Update PER first */
 	state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv,
-					 tx_info_priv, tx_rate, xretries,
+					 tx_info, tx_rate, xretries,
 					 retries, now_msec);
 
 	/*
@@ -1098,7 +1098,6 @@ static void ath_rc_tx_status(struct ath_
 			     struct ieee80211_tx_info *tx_info,
 			     int final_ts_idx, int xretries, int long_retry)
 {
-	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 	const struct ath_rate_table *rate_table;
 	struct ieee80211_tx_rate *rates = tx_info->status.rates;
 	u8 flags;
@@ -1124,9 +1123,8 @@ static void ath_rc_tx_status(struct ath_
 					return;
 
 				rix = ath_rc_get_rateindex(rate_table, &rates[i]);
-				ath_rc_update_ht(sc, ath_rc_priv,
-						tx_info_priv, rix,
-						xretries ? 1 : 2,
+				ath_rc_update_ht(sc, ath_rc_priv, tx_info,
+						rix, xretries ? 1 : 2,
 						rates[i].count);
 			}
 		}
@@ -1149,8 +1147,7 @@ static void ath_rc_tx_status(struct ath_
 		return;
 
 	rix = ath_rc_get_rateindex(rate_table, &rates[i]);
-	ath_rc_update_ht(sc, ath_rc_priv, tx_info_priv, rix,
-			 xretries, long_retry);
+	ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry);
 }
 
 static const
@@ -1301,23 +1298,30 @@ static void ath_tx_status(void *priv, st
 {
 	struct ath_softc *sc = priv;
 	struct ath_rate_priv *ath_rc_priv = priv_sta;
-	struct ath_tx_info_priv *tx_info_priv = NULL;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_hdr *hdr;
-	int final_ts_idx, tx_status = 0, is_underrun = 0;
+	int final_ts_idx = 0, tx_status = 0, is_underrun = 0;
+	int long_retry = 0;
 	__le16 fc;
+	int i;
 
 	hdr = (struct ieee80211_hdr *)skb->data;
 	fc = hdr->frame_control;
-	tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
-	final_ts_idx = tx_info_priv->tx.ts_rateindex;
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		struct ieee80211_tx_rate *rate = &tx_info->status.rates[i];
+		if (!rate->count)
+			break;
+
+		final_ts_idx = i;
+		long_retry = rate->count - 1;
+	}
 
 	if (!priv_sta || !ieee80211_is_data(fc) ||
-	    !tx_info_priv->update_rc)
-		goto exit;
+	    !(tx_info->driver_flags & ATH_TX_INFO_UPDATE_RC))
+		return;
 
-	if (tx_info_priv->tx.ts_status & ATH9K_TXERR_FILT)
-		goto exit;
+	if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED)
+		return;
 
 	/*
 	 * If underrun error is seen assume it as an excessive retry only
@@ -1325,20 +1329,17 @@ static void ath_tx_status(void *priv, st
 	 * Adjust the long retry as if the frame was tried hw->max_rate_tries
 	 * times. This affects how ratectrl updates PER for the failed rate.
 	 */
-	if (tx_info_priv->tx.ts_flags &
-	    (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) &&
-	    ((sc->sc_ah->tx_trig_level) >= ath_rc_priv->tx_triglevel_max)) {
+	if ((tx_info->driver_flags & ATH_TX_INFO_UNDERRUN) &&
+	    (sc->sc_ah->tx_trig_level >= ath_rc_priv->tx_triglevel_max)) {
 		tx_status = 1;
 		is_underrun = 1;
 	}
 
-	if ((tx_info_priv->tx.ts_status & ATH9K_TXERR_XRETRY) ||
-	    (tx_info_priv->tx.ts_status & ATH9K_TXERR_FIFO))
+	if (tx_info->driver_flags & ATH_TX_INFO_XRETRY)
 		tx_status = 1;
 
 	ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status,
-			 (is_underrun) ? sc->hw->max_rate_tries :
-			 tx_info_priv->tx.ts_longretry);
+			 (is_underrun) ? sc->hw->max_rate_tries : long_retry);
 
 	/* Check if aggregation has to be enabled for this tid */
 	if (conf_is_ht(&sc->hw->conf) &&
@@ -1357,8 +1358,6 @@ static void ath_tx_status(void *priv, st
 	}
 
 	ath_debug_stat_rc(sc, skb);
-exit:
-	kfree(tx_info_priv);
 }
 
 static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,