ath9k_htc: Set the BSSID mask for multiple interfaces

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/htc.h

@@ -210,6 +210,11 @@ struct ath9k_htc_vif {
 	u8 index;
 };
 
+struct ath9k_vif_iter_data {
+	const u8 *hw_macaddr;
+	u8 mask[ETH_ALEN];
+};
+
 #define ATH9K_HTC_MAX_STA 8
 #define ATH9K_HTC_MAX_TID 8
 

drivers/net/wireless/ath/ath9k/htc_drv_main.c

@@ -133,6 +133,39 @@ static void ath9k_htc_vif_reconfig(struct ath9k_htc_priv *priv)
 	}
 }
 
+static void ath9k_htc_bssid_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
+{
+	struct ath9k_vif_iter_data *iter_data = data;
+	int i;
+
+	for (i = 0; i < ETH_ALEN; i++)
+		iter_data->mask[i] &= ~(iter_data->hw_macaddr[i] ^ mac[i]);
+}
+
+static void ath9k_htc_set_bssid_mask(struct ath9k_htc_priv *priv,
+				     struct ieee80211_vif *vif)
+{
+	struct ath_common *common = ath9k_hw_common(priv->ah);
+	struct ath9k_vif_iter_data iter_data;
+
+	/*
+	 * Use the hardware MAC address as reference, the hardware uses it
+	 * together with the BSSID mask when matching addresses.
+	 */
+	iter_data.hw_macaddr = common->macaddr;
+	memset(&iter_data.mask, 0xff, ETH_ALEN);
+
+	if (vif)
+		ath9k_htc_bssid_iter(&iter_data, vif->addr, vif);
+
+	/* Get list of all active MAC addresses */
+	ieee80211_iterate_active_interfaces_atomic(priv->hw, ath9k_htc_bssid_iter,
+						   &iter_data);
+
+	memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
+	ath_hw_setbssidmask(common);
+}
+
 void ath9k_htc_reset(struct ath9k_htc_priv *priv)
 {
 	struct ath_hw *ah = priv->ah;
@@ -1200,6 +1233,8 @@ static int ath9k_htc_add_interface(struct ieee80211_hw *hw,
 		goto out;
 	}
 
+	ath9k_htc_set_bssid_mask(priv, vif);
+
 	priv->ah->opmode = vif->type;
 	priv->vif_slot |= (1 << avp->index);
 	priv->nvifs++;