net: enetc: set MAC address to the VF net_device

The MAC address of VF can be configured through the mailbox mechanism of
ENETC, but the previous implementation forgot to set the MAC address in
net_device, resulting in the SMAC of the sent frames still being the old
MAC address. Since the MAC address in the hardware has been changed, Rx
cannot receive frames with the DMAC address as the new MAC address. The
most obvious phenomenon is that after changing the MAC address, we can
see that the MAC address of eno0vf0 has not changed through the "ifconfig
eno0vf0" command and the IP address cannot be obtained .

root@ls1028ardb:~# ifconfig eno0vf0 down
root@ls1028ardb:~# ifconfig eno0vf0 hw ether 00:04:9f:3a:4d:56 up
root@ls1028ardb:~# ifconfig eno0vf0
eno0vf0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 66:36:2c:3b:87:76  txqueuelen 1000  (Ethernet)
        RX packets 794  bytes 69239 (69.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 11  bytes 2226 (2.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Fixes: beb74ac ("enetc: Add vf to pf messaging support")
Signed-off-by: Wei Fang <[email protected]>
Reviewed-by: Vladimir Oltean <[email protected]>
Reviewed-by: Claudiu Manoil <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Wei Fang

drivers/net/ethernet/freescale/enetc/enetc_vf.c

@@ -78,11 +78,18 @@ static int enetc_vf_set_mac_addr(struct net_device *ndev, void *addr)
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	struct sockaddr *saddr = addr;
+	int err;
 
 	if (!is_valid_ether_addr(saddr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	return enetc_msg_vsi_set_primary_mac_addr(priv, saddr);
+	err = enetc_msg_vsi_set_primary_mac_addr(priv, saddr);
+	if (err)
+		return err;
+
+	eth_hw_addr_set(ndev, saddr->sa_data);
+
+	return 0;
 }
 
 static int enetc_vf_set_features(struct net_device *ndev,