static void acm_port_destruct(struct tty_port *port)
{
	struct acm *acm = container_of(port, struct acm, port);

	dev_dbg(&acm->control->dev, "%s\n", __func__);

	acm_release_minor(acm);
	usb_put_intf(acm->control);
	kfree(acm->country_codes);
	kfree(acm);
}

Unknown