usb: gadget: u_ether: use eth_hw_addr_set()

Commit 406f42fa ("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it got through appropriate helpers.
Reviewed-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20211019172124.1413620-1-kuba@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/function/u_ether.c

@@ -754,6 +754,7 @@ struct eth_dev *gether_setup_name(struct usb_gadget *g,
 	struct eth_dev		*dev;
 	struct net_device	*net;
 	int			status;
+	u8			addr[ETH_ALEN];
 
 	net = alloc_etherdev(sizeof *dev);
 	if (!net)
@@ -773,9 +774,10 @@ struct eth_dev *gether_setup_name(struct usb_gadget *g,
 	dev->qmult = qmult;
 	snprintf(net->name, sizeof(net->name), "%s%%d", netname);
 
-	if (get_ether_addr(dev_addr, net->dev_addr))
+	if (get_ether_addr(dev_addr, addr))
 		dev_warn(&g->dev,
 			"using random %s ethernet address\n", "self");
+	eth_hw_addr_set(net, addr);
 	if (get_ether_addr(host_addr, dev->host_mac))
 		dev_warn(&g->dev,
 			"using random %s ethernet address\n", "host");