Ah ok, then it is supposed to be like below, isn't it?

static int lan865x_set_mac_address(struct net_device *netdev, void *addr)
{
	struct sockaddr *address = addr;
	int ret;

	if (netif_running(netdev))
		return -EBUSY;

	ret = lan865x_set_hw_macaddr(netdev);
	if (ret)
		return ret;

	eth_hw_addr_set(netdev, address->sa_data);

	return 0;
}

Yes, that is better. In practice, its probably not an issue, setting
the MAC address will never fail, but it is good to get right, just in
case.

	Andrew