ath9k: improve max rate retry handling

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19308 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/patches/600-ath9k_rc_tries.patch

@@ -0,0 +1,42 @@
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -645,8 +645,7 @@ void ath9k_set_hw_capab(struct ath_softc
+ 	hw->max_rates = 4;
+ 	hw->channel_change_time = 5000;
+ 	hw->max_listen_interval = 10;
+-	/* Hardware supports 10 but we use 4 */
+-	hw->max_rate_tries = 4;
++	hw->max_rate_tries = 10;
+ 	hw->sta_data_size = sizeof(struct ath_node);
+ 	hw->vif_data_size = sizeof(struct ath_vif);
+ 
+--- a/drivers/net/wireless/ath/ath9k/rc.c
++++ b/drivers/net/wireless/ath/ath9k/rc.c
+@@ -678,13 +678,13 @@ static void ath_get_rate(void *priv, str
+ 	 * For Multi Rate Retry we use a different number of
+ 	 * retry attempt counts. This ends up looking like this:
+ 	 *
+-	 * MRR[0] = 2
+-	 * MRR[1] = 2
+-	 * MRR[2] = 2
+-	 * MRR[3] = 4
++	 * MRR[0] = 4
++	 * MRR[1] = 4
++	 * MRR[2] = 4
++	 * MRR[3] = 8
+ 	 *
+ 	 */
+-	try_per_rate = sc->hw->max_rate_tries;
++	try_per_rate = 4;
+ 
+ 	rate_table = sc->cur_rate_table;
+ 	rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe);
+@@ -714,7 +714,7 @@ static void ath_get_rate(void *priv, str
+ 	for ( ; i < 4; i++) {
+ 		/* Use twice the number of tries for the last MRR segment. */
+ 		if (i + 1 == 4)
+-			try_per_rate = 4;
++			try_per_rate = 8;
+ 
+ 		ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &nrix);
+ 		/* All other rates in the series have RTS enabled */