mac80211: init rate-control for TDLS sta when supp-rates are known

Initialize rate control algorithms only when supported rates are known
for a TDLS peer sta. Direct Tx between peers is not allowed before the
link is enabled. In turn, this only occurs after a change_station()
call that sets supported rates.
Signed-off-by: NArik Nemtsov <arik@wizery.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/mac80211/cfg.c

@@ -869,7 +869,12 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 
 	sta_apply_parameters(local, sta, params);
 
-	rate_control_rate_init(sta);
+	/*
+	 * for TDLS, rate control should be initialized only when supported
+	 * rates are known.
+	 */
+	if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+		rate_control_rate_init(sta);
 
 	layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 		sdata->vif.type == NL80211_IFTYPE_AP;
@@ -953,6 +958,9 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 
 	sta_apply_parameters(local, sta, params);
 
+	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && params->supported_rates)
+		rate_control_rate_init(sta);
+
 	rcu_read_unlock();
 
 	if (sdata->vif.type == NL80211_IFTYPE_STATION &&