Function virtio_dev_stop

dpdk/drivers/net/virtio/virtio_ethdev.c:2508–2548

* Stop device: disable interrupt and mark link down */

 * Stop device: disable interrupt and mark link down
 */
int
virtio_dev_stop(struct rte_eth_dev *dev)
{
	struct virtio_hw *hw = dev->data->dev_private;
	struct rte_eth_link link;
	struct rte_eth_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
	uint16_t i;

	PMD_INIT_LOG(DEBUG, "stop");
	dev->data->dev_started = 0;

	rte_spinlock_lock(&hw->state_lock);
	if (!hw->started)
		goto out_unlock;
	hw->started = 0;

	virtio_tx_completed_cleanup(dev);

	if (intr_conf->lsc || intr_conf->rxq) {
		virtio_intr_disable(dev);

		/* Reset interrupt callback  */
		if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
			rte_intr_callback_unregister(dev->intr_handle,
						     virtio_interrupt_handler,
						     dev);
		}
	}

	memset(&link, 0, sizeof(link));
	rte_eth_linkstatus_set(dev, &link);
out_unlock:
	rte_spinlock_unlock(&hw->state_lock);

	for (i = 0; i < dev->data->nb_rx_queues; i++)
		dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
	for (i = 0; i < dev->data->nb_tx_queues; i++)
		dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;

	return 0;
}

static int
virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)