From: Lucas Stach <l.stach@pengutronix.de>
Date: Mon, 3 Jun 2013 00:38:39 +0000 (+0000)
Subject: net: fec: add fallback to random MAC address
X-Git-Tag: firefly_0821_release~3680^2~363^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ff5b2fabf53426c15a5f041505687f94d1b2109f;p=firefly-linux-kernel-4.4.55.git

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>
---

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 */