linux-kernel - Need assistance fixing a tg3 driver side-effect on IPMI

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Message-ID: <20121107082820.GP30936@casco.aei.mpg.de>
Date:	Wed, 7 Nov 2012 09:28:20 +0100
From:	Steffen Grunewald <Steffen.Grunewald@....mpg.de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	htejun@...il.com, tj@...nel.org,
	Carsten Aulbert <carsten.aulbert@....mpg.de>
Subject: Need assistance fixing a tg3 driver side-effect on IPMI

Hi everyone,

I've been running into a problem while installing Debian Wheezy on a bunch
of 6-year old machines which have been running Squeeze happily for years.

They are SuperMicro-based (H8SSL opteron board), with two BCM95704A6 (Tigon3) 
interfaces, and a BMC/IPMI card (SuperMicro 1U) which shares eth0.

With a 2.6.32 kernel (and the 3.102 version of the tg3 driver) everything is fine.

With Debian's 3.2 (and tg3 3.121) I lose access to the IPMI LAN (or LANplus)
interface as soon as the tg3 module has been loaded. Even shutting down doesn't
give the interface back - I've got to pull the power plug.

Trying to git bisect the corresponding changes to the tg3 driver, I'm running
against a wall at the point where the source code has been moved to another
subtree back in 2011 (still a long time past Squeeze). I appear to be unable
to go back beyond that.

Can you advise how to find out when IPMI access got lost, and how to re-enable
it? Any suggestion is appreciated.
I suppose it wouldn't be as easy as "get the old source from 2.6.32, and plug
it into drivers/net/ethernet/broadcom, then rebuild the kernel" -?

Please keep me on CC, thanks.

Regards,
 Steffen
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