net: fec: add fallback to random MAC address

If no valid MAC address could be obtained from the hardware,
fall back to a randomly generated one.

Signed-off-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 85a06037b242..a667015be22a 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1038,6 +1038,18 @@ static void fec_get_mac(struct net_device *ndev)
                 iap = &tmpaddr[0];
         }
 
+        /*
+         * 5) random mac address
+         */
+        if (!is_valid_ether_addr(iap)) {
+                /* Report it and use a random ethernet address instead */
+                netdev_err(ndev, "Invalid MAC address: %pM\n", iap);
+                eth_hw_addr_random(ndev);
+                netdev_info(ndev, "Using random MAC address: %pM\n",
+                            ndev->dev_addr);
+                return;
+        }
+
         memcpy(ndev->dev_addr, iap, ETH_ALEN);
 
         /* Adjust MAC if using macaddr */