Bluetooth: Refactor SCO connection into its own function

We can do the same that we did for the other link types, for SCO
connections. The only thing that's worth noting is that as SCO
links need an ACL link, this functions uses the function that adds
an ACL link.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

net/bluetooth/hci_conn.c

@@ -521,29 +521,19 @@ static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 	return acl;
 }
 
-/* Create SCO, ACL or LE connection.
- * Device _must_ be locked */
-struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
-			     __u8 dst_type, __u8 sec_level, __u8 auth_type)
+static struct hci_conn *hci_connect_sco(struct hci_dev *hdev, bdaddr_t *dst,
+				     u8 sec_level, u8 auth_type)
 {
 	struct hci_conn *acl;
 	struct hci_conn *sco;
 
-	BT_DBG("%s dst %s", hdev->name, batostr(dst));
-
-	if (type == LE_LINK)
-		return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
-
 	acl = hci_connect_acl(hdev, dst, sec_level, auth_type);
 	if (IS_ERR(acl))
 		return acl;
 
-	if (type == ACL_LINK)
-		return acl;
-
-	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
+	sco = hci_conn_hash_lookup_ba(hdev, SCO_LINK, dst);
 	if (!sco) {
-		sco = hci_conn_add(hdev, type, dst);
+		sco = hci_conn_add(hdev, SCO_LINK, dst);
 		if (!sco) {
 			hci_conn_put(acl);
 			return ERR_PTR(-ENOMEM);
@@ -572,6 +562,21 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
 	return sco;
 }
 
+/* Create SCO, ACL or LE connection. */
+struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
+			     __u8 dst_type, __u8 sec_level, __u8 auth_type)
+{
+	BT_DBG("%s dst %s", hdev->name, batostr(dst));
+
+	if (type == LE_LINK)
+		return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
+
+	if (type == ACL_LINK)
+		return hci_connect_acl(hdev, dst, sec_level, auth_type);
+
+	return hci_connect_sco(hdev, dst, sec_level, auth_type);
+}
+
 /* Check link security requirement */
 int hci_conn_check_link_mode(struct hci_conn *conn)
 {