net: ethernet: ax88796: support generating a random mac address

Uwe Kleine-König · davem330 · commit 03d1da3c050b · 2017-05-26T14:56:19.000-04:00
Instead of falling back to 00:00:00:00:00:00 generate a random address
if none is provided via platform data or from the device's register
space.

Signed-off-by: Uwe Kleine-König &lt;u.kleine-koenig@pengutronix.de&gt;
Reviewed-by: Andrew Lunn &lt;andrew@lunn.ch&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/drivers/net/ethernet/8390/ax88796.c b/drivers/net/ethernet/8390/ax88796.c
@@ -723,6 +723,12 @@ static int ax_init_dev(struct net_device *dev)
 	    ax->plat->mac_addr)
 		memcpy(dev->dev_addr, ax->plat->mac_addr, ETH_ALEN);
 
+	if (!is_valid_ether_addr(dev->dev_addr)) {
+		eth_hw_addr_random(dev);
+		dev_info(&dev->dev, "Using random MAC address: %pM\n",
+			 dev->dev_addr);
+	}
+
 	ax_reset_8390(dev);
 
 	ei_local->name = "AX88796";
