static int usb_8dev_open(struct net_device *netdev)
{
	struct usb_8dev_priv *priv = netdev_priv(netdev);
	int err;

	/* common open */
	err = open_candev(netdev);
	if (err)
		return err;

	can_led_event(netdev, CAN_LED_EVENT_OPEN);

	/* finally start device */
	err = usb_8dev_start(priv);
	if (err) {
		if (err == -ENODEV)
			netif_device_detach(priv->netdev);

		netdev_warn(netdev, "couldn't start device: %d\n",
			 err);

		close_candev(netdev);

		return err;
	}

	netif_start_queue(netdev);

	return 0;
}
static int usb_8dev_open(struct net_device *netdev)
{
	struct usb_8dev_priv *priv = netdev_priv(netdev);
	int err;

	 
	err = open_candev(netdev);
	if (err)
		return err;

	can_led_event(netdev, CAN_LED_EVENT_OPEN);

	 
	err = usb_8dev_start(priv);
	if (err) {
		if (err == -ENODEV)
			netif_device_detach(priv->netdev);

		netdev_warn(netdev, "couldn't start device: %d\n",
			 err);

		close_candev(netdev);

		return err;
	}

	netif_start_queue(netdev);

	return 0;
}