From: Sven Schnelle <svens@stackframe.org>
Date: Mon, 9 Jun 2008 23:33:57 +0000 (-0700)
Subject: macb: use random mac if stored address in EEPROM is invalid
X-Git-Tag: accepted/tizen/common/20141203.182822~21394^2~329^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d1d5741d8568c268ec234a5b35af4a04498be6d8;p=platform%2Fkernel%2Flinux-arm64.git

macb: use random mac if stored address in EEPROM is invalid

We should use a random mac address if the EEPROM doesn't contain a valid
one. This makes life on Boards with unprogrammed EEPROM devices easier.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 92dccd4..e346302 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -80,8 +80,12 @@ static void __init macb_get_hwaddr(struct macb *bp)
 	addr[4] = top & 0xff;
 	addr[5] = (top >> 8) & 0xff;
 
-	if (is_valid_ether_addr(addr))
+	if (is_valid_ether_addr(addr)) {
 		memcpy(bp->dev->dev_addr, addr, sizeof(addr));
+	} else {
+		dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
+		random_ether_addr(bp->dev->dev_addr);
+	}
 }
 
 static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)