linux-kernel - Re: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM

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Message-ID: <Pine.LNX.4.64.0809251921340.18801@twin.jikos.cz>
Date:	Thu, 25 Sep 2008 19:24:57 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Frans Pop <elendil@...net.nl>
cc:	Jiri Kosina <jkosina@...e.cz>, airlied@...il.com,
	Jeff Garzik <jeff@...zik.org>, davem@...emloft.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	jeffrey.t.kirsher@...el.com, david.vrabel@....com, rjw@...k.pl,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	chrisl@...are.com, Ingo Molnar <mingo@...e.hu>,
	jbarnes@...tuousgeek.org, jesse.brandeburg@...il.com
Subject: Re: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM

On Thu, 25 Sep 2008, Frans Pop wrote:

> Extra datapoint. As far as I've seen this problem has not yet been 
> reported by any people running Debian. This could point to X.Org as 
> Debian currently has 7.3 while I think the reports so far have been with 
> 7.4.

Yes, I think that xorg/xorg i915 driver/libdrm/GEM/whatever are the 
biggest suspect currently, according to the data that has been gathered so 
far.

Still, what confuses me a little bit -- the EEPROM of the card is set to 
all 0xff, once the corruption happens. Isn't that a quite a coincidence, 
that bytes representing "nothing" in this context are used?

If being set to 0 (it's so easy to call memset(0) on a bogus pointer, 
there are usually lots of them in the code) or to random garbage, it would 
seem to be much more understandable, than 0xff.

-- 
Jiri Kosina
SUSE Labs

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