net: macb: implement live mac addr change

Implement live mac addr change for the macb ethernet driver.
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20221104204837.614459-1-roman.gushchin@linux.devSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/cadence/macb_main.c

@@ -2946,6 +2946,18 @@ static int macb_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
+static int macb_set_mac_addr(struct net_device *dev, void *addr)
+{
+	int err;
+
+	err = eth_mac_addr(dev, addr);
+	if (err < 0)
+		return err;
+
+	macb_set_hwaddr(netdev_priv(dev));
+	return 0;
+}
+
 static void gem_update_stats(struct macb *bp)
 {
 	struct macb_queue *queue;
@@ -3785,7 +3797,7 @@ static const struct net_device_ops macb_netdev_ops = {
 	.ndo_eth_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_change_mtu		= macb_change_mtu,
-	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_set_mac_address	= macb_set_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= macb_poll_controller,
 #endif
@@ -4048,6 +4060,8 @@ static int macb_init(struct platform_device *pdev)
 		dev->ethtool_ops = &macb_ethtool_ops;
 	}
 
+	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+
 	/* Set features */
 	dev->hw_features = NETIF_F_SG;