Bluetooth: ISO: Fix CIG auto-allocation to select configurable CIG

Make CIG auto-allocation to select the first CIG_ID that is still
configurable. Also use correct CIG_ID range (see Core v5.3 Vol 4 Part E
Sec 7.8.97 p.2553).

Previously, it would always select CIG_ID 0 regardless of anything,
because cis_list with data.cis == 0xff (BT_ISO_QOS_CIS_UNSET) would not
count any CIS. Since we are not adding CIS here, use find_cis instead.

Fixes: 26afbd82 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

net/bluetooth/hci_conn.c

@@ -1769,24 +1769,23 @@ static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
 
 	memset(&data, 0, sizeof(data));
 
-	/* Allocate a CIG if not set */
+	/* Allocate first still reconfigurable CIG if not set */
 	if (qos->ucast.cig == BT_ISO_QOS_CIG_UNSET) {
-		for (data.cig = 0x00; data.cig < 0xff; data.cig++) {
+		for (data.cig = 0x00; data.cig < 0xf0; data.cig++) {
 			data.count = 0;
-			data.cis = 0xff;
 
-			hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
-						 BT_BOUND, &data);
+			hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
+						 BT_CONNECT, &data);
 			if (data.count)
 				continue;
 
-			hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
+			hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
 						 BT_CONNECTED, &data);
 			if (!data.count)
 				break;
 		}
 
-		if (data.cig == 0xff)
+		if (data.cig == 0xf0)
 			return false;
 
 		/* Update CIG */