Function sfc_mac_addr_set

dpdk/drivers/net/sfc/sfc_ethdev.c:1176–1260

	return -rc;
}
static int
sfc_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
{
	struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	struct sfc_port *port = &sa->port;
	struct rte_ether_addr *old_addr = &dev->data->mac_addrs[0];
	int rc = 0;

	sfc_adapter_lock(sa);

	if (rte_is_same_ether_addr(mac_addr, &port->default_mac_addr))
		goto unlock;

	/*
	 * Copy the address to the device private data so that
	 * it could be recalled in the case of adapter restart.
	 */
	rte_ether_addr_copy(mac_addr, &port->default_mac_addr);

	/*
	 * Neither of the two following checks can return
	 * an error. The new MAC address is preserved in
	 * the device private data and can be activated
	 * on the next port start if the user prevents
	 * isolated mode from being enabled.
	 */
	if (sfc_sa2shared(sa)->isolated) {
		sfc_warn(sa, "isolated mode is active on the port");
		sfc_warn(sa, "will not set MAC address");
		goto unlock;
	}

	if (sa->state != SFC_ETHDEV_STARTED) {
		sfc_notice(sa, "the port is not started");
		sfc_notice(sa, "the new MAC address will be set on port start");

		goto unlock;
	}

	if (encp->enc_allow_set_mac_with_installed_filters) {
		rc = efx_mac_addr_set(sa->nic, mac_addr->addr_bytes);
		if (rc != 0) {
			sfc_err(sa, "cannot set MAC address (rc = %u)", rc);
			goto unlock;
		}

		/*
		 * Changing the MAC address by means of MCDI request
		 * has no effect on received traffic, therefore
		 * we also need to update unicast filters
		 */
		rc = sfc_set_rx_mode_unchecked(sa);
		if (rc != 0) {
			sfc_err(sa, "cannot set filter (rc = %u)", rc);
			/* Rollback the old address */
			(void)efx_mac_addr_set(sa->nic, old_addr->addr_bytes);
			(void)sfc_set_rx_mode_unchecked(sa);