wifi: mt76: mt7921: fix wrong 6Ghz power type

To avoid using incorrect 6g power settings after disconnection,
it should to update back to the default state when disconnected.

Fixes: 51ba0e3a ("wifi: mt76: mt7921: add 6GHz power type support for clc")
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7921/main.c

@@ -683,17 +683,45 @@ static void mt7921_bss_info_changed(struct ieee80211_hw *hw,
 }
 
 static void
-mt7921_regd_set_6ghz_power_type(struct ieee80211_vif *vif)
+mt7921_calc_vif_num(void *priv, u8 *mac, struct ieee80211_vif *vif)
+{
+	u32 *num = priv;
+
+	if (!priv)
+		return;
+
+	switch (vif->type) {
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
+		*num += 1;
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+mt7921_regd_set_6ghz_power_type(struct ieee80211_vif *vif, bool is_add)
 {
 	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
 	struct mt792x_phy *phy = mvif->phy;
 	struct mt792x_dev *dev = phy->dev;
+	u32 valid_vif_num = 0;
+
+	ieee80211_iterate_active_interfaces(mt76_hw(dev),
+					    IEEE80211_IFACE_ITER_RESUME_ALL,
+					    mt7921_calc_vif_num, &valid_vif_num);
 
-	if (hweight64(dev->mt76.vif_mask) > 1) {
+	if (valid_vif_num > 1) {
 		phy->power_type = MT_AP_DEFAULT;
 		goto out;
 	}
 
+	if (!is_add)
+		vif->bss_conf.power_type = IEEE80211_REG_UNSET_AP;
+
 	switch (vif->bss_conf.power_type) {
 	case IEEE80211_REG_SP_AP:
 		phy->power_type = MT_AP_SP;
@@ -705,6 +733,8 @@ mt7921_regd_set_6ghz_power_type(struct ieee80211_vif *vif)
 		phy->power_type = MT_AP_LPI;
 		break;
 	case IEEE80211_REG_UNSET_AP:
+		phy->power_type = MT_AP_UNSET;
+		break;
 	default:
 		phy->power_type = MT_AP_DEFAULT;
 		break;
@@ -749,7 +779,7 @@ int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	if (ret)
 		return ret;
 
-	mt7921_regd_set_6ghz_power_type(vif);
+	mt7921_regd_set_6ghz_power_type(vif, true);
 
 	mt76_connac_power_save_sched(&dev->mphy, &dev->pm);
 
@@ -811,6 +841,8 @@ void mt7921_mac_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 		list_del_init(&msta->wcid.poll_list);
 	spin_unlock_bh(&dev->mt76.sta_poll_lock);
 
+	mt7921_regd_set_6ghz_power_type(vif, false);
+
 	mt76_connac_power_save_sched(&dev->mphy, &dev->pm);
 }
 EXPORT_SYMBOL_GPL(mt7921_mac_sta_remove);