netdev - [BUG] tg3 cannot do PXE (loses MAC address) after soft reboot

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Message-ID: <20070913083918.GA5386@xanadu.blop.info>
Date:	Thu, 13 Sep 2007 10:39:18 +0200
From:	Lucas Nussbaum <lucas.nussbaum@...g.fr>
To:	netdev@...r.kernel.org
Cc:	mchan@...adcom.com
Subject: [BUG] tg3 cannot do PXE (loses MAC address) after soft reboot

Hi,

We use PXE with Broadcom NetXtreme cards. After a soft reboot (using the
"reboot" command), the system cannot get an IP address using DHCP. On
the console, a MAC address of 00 00 00 00 00 00 is shown. When rebooting
with "reboot -f" or with the reset button, everything works as expected.

This used to work, and broke between 2.6.16 and 2.6.17. Using git bissect,
I could trace this back to that commit:
commit bc1c756741b065cfebf850e4164c0e2aae9d527f
Author: Michael Chan <mchan@...adcom.com>
Date:   Mon Mar 20 17:48:03 2006 -0800
    [TG3]: Support shutdown WoL.

During boot, the following messages are displayed:
Broadcom NetXtreme Gigabit Ethernet Boot Agent v2.2.8
[...]
Broadcom UNDI, PXE-2.1 (build 082) v2.2.8
[...]
CLIENT MAC ADDR: 00 10 18 01 E5 2F GUID: 44454C4C 4800 1052 8032
B9C04F53304A

After a soft reboot, the last line is changed to:
CLIENT MAC ADDR: 00 00 00 00 00 00 GUID: 44454C4C 4800 1052 8032
B9C04F53304A

lspci -v for the card:
02:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5703X Gigabit Ethernet (rev 02)
        Subsystem: Broadcom Corporation NetXtreme BCM5703 1000Base-T
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 177
        Memory at fcf00000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [40] PCI-X non-bridge device
        Capabilities: [48] Power Management version 2
        Capabilities: [50] Vital Product Data
        Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+ Queue=0/3 Enable-

Thank you,
-- 
| Lucas Nussbaum                        PhD student |
| lucas.nussbaum@...g.fr        LIG / Projet MESCAL |
| jabber: lucas@...sbaum.fr    +33 (0)6 64 71 41 65 |
| homepage:        http://www-id.imag.fr/~nussbaum/ |
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