Bluetooth: Refactor hci_connect_le

	if (test_bit(HCI_ADVERTISING, &hdev->flags))

		return ERR_PTR(-ENOTSUPP);

	/* Some devices send ATT messages as soon as the physical link is

	 * established. To be able to handle these ATT messages, the user-

	 * space first establishes the connection and then starts the pairing

	 * process.

	 *

	 * So if a hci_conn object already exists for the following connection

	 * attempt, we simply update pending_sec_level and auth_type fields

	 * and return the object found.

	 */

	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);

	if (!conn) {

	if (conn) {

		conn->pending_sec_level = sec_level;

		conn->auth_type = auth_type;

		goto done;

	}

	/* Since the controller supports only one LE connection attempt at a

	 * time, we return -EBUSY if there is any connection attempt running.

	 */

	conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);

	if (conn)

		return ERR_PTR(-EBUSY);

	conn->out = true;

	conn->link_mode |= HCI_LM_MASTER;

	conn->sec_level = BT_SECURITY_LOW;

	conn->pending_sec_level = sec_level;

	conn->auth_type = auth_type;

	err = hci_create_le_conn(conn);

	if (err)

		return ERR_PTR(err);

	}

	conn->pending_sec_level = sec_level;

	conn->auth_type = auth_type;

done:

	hci_conn_hold(conn);

	return conn;

}