Commit 008652b3 authored by Michael Chan's avatar Michael Chan Committed by David S. Miller
Browse files

[TG3]: Fix probe failure due to invalid MAC address 



Some older bootcode in some devices may report 0 MAC address in
SRAM when booting up from low power state. This patch fixes the
problem by checking for a valid MAC address in SRAM and falling back
to NVRAM if necessary.

Thanks to walt <wa1ter@myrealbox.com> for reporting the problem
and helping to debug it.

Signed-off-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ca9ba447

drivers/net/tg3.c

+28 −22
Original line number Diff line number Diff line
@@ -10531,6 +10531,7 @@ static int __devinit tg3_get_device_address(struct tg3 *tp) 
{

	struct net_device *dev = tp->dev;

	u32 hi, lo, mac_offset;

	int addr_ok = 0;



#ifdef CONFIG_SPARC64

	if (!tg3_get_macaddr_sparc(tp))
@@ -10560,9 +10561,13 @@ static int __devinit tg3_get_device_address(struct tg3 *tp) 
		dev->dev_addr[3] = (lo >> 16) & 0xff;

		dev->dev_addr[4] = (lo >>  8) & 0xff;

		dev->dev_addr[5] = (lo >>  0) & 0xff;



		/* Some old bootcode may report a 0 MAC address in SRAM */

		addr_ok = is_valid_ether_addr(&dev->dev_addr[0]);

	}

	if (!addr_ok) {

		/* Next, try NVRAM. */

	else if (!(tp->tg3_flags & TG3_FLG2_SUN_570X) &&

		if (!(tp->tg3_flags & TG3_FLG2_SUN_570X) &&

		    !tg3_nvram_read(tp, mac_offset + 0, &hi) &&

		    !tg3_nvram_read(tp, mac_offset + 4, &lo)) {

			dev->dev_addr[0] = ((hi >> 16) & 0xff);
@@ -10584,6 +10589,7 @@ static int __devinit tg3_get_device_address(struct tg3 *tp) 
			dev->dev_addr[1] = hi & 0xff;

			dev->dev_addr[0] = (hi >> 8) & 0xff;

		}

	}



	if (!is_valid_ether_addr(&dev->dev_addr[0])) {

#ifdef CONFIG_SPARC64

CRA Git | Maintained and supported by SUSTech CRA and CCSE