mt76: mt7615: fix ssid configuration in mt7615_mcu_hw_scan

Fix SSID configuration performing hw frequency scanning
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -2719,9 +2719,9 @@ int mt7615_mcu_hw_scan(struct mt7615_phy *phy, struct ieee80211_vif *vif,
 {
 	struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
 	struct cfg80211_scan_request *sreq = &scan_req->req;
+	int n_ssids = 0, err, i, duration = MT7615_SCAN_CHANNEL_TIME;
 	int ext_channels_num = max_t(int, sreq->n_channels - 32, 0);
 	struct ieee80211_channel **scan_list = sreq->channels;
-	int err, i, duration = MT7615_SCAN_CHANNEL_TIME;
 	struct mt7615_dev *dev = phy->dev;
 	bool ext_phy = phy != &dev->phy;
 	struct mt7615_mcu_scan_channel *chan;
@@ -2744,16 +2744,21 @@ int mt7615_mcu_hw_scan(struct mt7615_phy *phy, struct ieee80211_vif *vif,
 	req->seq_num = mvif->scan_seq_num | ext_phy << 7;
 	req->bss_idx = mvif->idx;
 	req->scan_type = 1;
-	req->ssid_type = 1;
 	req->probe_req_num = 2;
 	req->version = 1;
 	req->channel_type = 4;
 
 	for (i = 0; i < sreq->n_ssids; i++) {
+		if (!sreq->ssids[i].ssid_len)
+			continue;
+
 		req->ssids[i].ssid_len = cpu_to_le32(sreq->ssids[i].ssid_len);
 		memcpy(req->ssids[i].ssid, sreq->ssids[i].ssid,
 		       sreq->ssids[i].ssid_len);
+		n_ssids++;
 	}
+	req->ssid_type = n_ssids ? BIT(2) : BIT(0);
+	req->ssids_num = n_ssids;
 
 	req->timeout_value = cpu_to_le16(sreq->n_channels * duration);
 	req->channel_min_dwell_time = cpu_to_le16(duration);