1 files changed, 72 insertions, 0 deletions
diff --git a/package/mac80211/patches/561-ath9k_streams_init.patch b/package/mac80211/patches/561-ath9k_streams_init.patch
new file mode 100644
index 000000000..822846661
--- /dev/null
+++ b/package/mac80211/patches/561-ath9k_streams_init.patch
@@ -0,0 +1,72 @@
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -176,6 +176,18 @@ static const struct ath_ops ath9k_common
+ 	.write = ath9k_iowrite32,
+ };
+ 
++static int count_streams(unsigned int chainmask, int max)
++{
++	int streams = 0;
++
++	do {
++		if (++streams == max)
++			break;
++	} while ((chainmask = chainmask & (chainmask - 1)));
++
++	return streams;
++}
++
+ /**************************/
+ /*     Initialization     */
+ /**************************/
+@@ -183,8 +195,10 @@ static const struct ath_ops ath9k_common
+ static void setup_ht_cap(struct ath_softc *sc,
+ 			 struct ieee80211_sta_ht_cap *ht_info)
+ {
+-	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
++	struct ath_hw *ah = sc->sc_ah;
++	struct ath_common *common = ath9k_hw_common(ah);
+ 	u8 tx_streams, rx_streams;
++	int i, max_streams;
+ 
+ 	ht_info->ht_supported = true;
+ 	ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
+@@ -198,25 +212,28 @@ static void setup_ht_cap(struct ath_soft
+ 	ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
+ 	ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
+ 
++	if (AR_SREV_9300_20_OR_LATER(ah))
++		max_streams = 3;
++	else
++		max_streams = 2;
++
+ 	/* set up supported mcs set */
+ 	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
+-	tx_streams = !(common->tx_chainmask & (common->tx_chainmask - 1)) ?
+-		     1 : 2;
+-	rx_streams = !(common->rx_chainmask & (common->rx_chainmask - 1)) ?
+-		     1 : 2;
++	tx_streams = count_streams(common->tx_chainmask, max_streams);
++	rx_streams = count_streams(common->rx_chainmask, max_streams);
++
++	ath_print(common, ATH_DBG_CONFIG,
++		  "TX streams %d, RX streams: %d\n",
++		  tx_streams, rx_streams);
+ 
+ 	if (tx_streams != rx_streams) {
+-		ath_print(common, ATH_DBG_CONFIG,
+-			  "TX streams %d, RX streams: %d\n",
+-			  tx_streams, rx_streams);
+ 		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
+ 		ht_info->mcs.tx_params |= ((tx_streams - 1) <<
+ 				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
+ 	}
+ 
+-	ht_info->mcs.rx_mask[0] = 0xff;
+-	if (rx_streams >= 2)
+-		ht_info->mcs.rx_mask[1] = 0xff;
++	for (i = 0; i < rx_streams; i++)
++		ht_info->mcs.rx_mask[i] = 0xff;
+ 
+ 	ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
+ }