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Date: Wed, 24 Sep 2008 07:09:09 +1000
From: "Dave Airlie" <airlied@gmail.com>
To: "David Miller" <davem@davemloft.net>
Subject: Re: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM
Cc: jkosina@suse.cz, david.vrabel@csr.com, rjw@sisk.pl,
       linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org,
       chrisl@vmware.com
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On Wed, Sep 24, 2008 at 7:05 AM, David Miller <davem@davemloft.net> wrote:
> From: Jiri Kosina <jkosina@suse.cz>
> Date: Tue, 23 Sep 2008 16:29:16 +0200 (CEST)
>
>> On Mon, 22 Sep 2008, David Miller wrote:
>>
>> > So I went through the changes from 2.6.27-rc5 until the SHA1
>> > ID ec0c15afb41fd9ad45b53468b60db50170e22346 and there were
>> > definitely no E1000 or E1000E changes during that time.
>>
>> Some recent comments on [1] seem to indicate that this is somehow coupled
>> into prior problems/panics with Intel graphics.
>
> My current suspicion in all of this is either the GEM kernel patches
> or recent X server.
>

I don't think OpenSUSE was shipping any of the GEM bits.

Dave.

> However, the eeprom/nvram programming sequence seems non-trivial on
> the e1000e.  You have to execute a set of precise register writes
> and register polls to successfully write things out to the nvram.
>
> This makes something like a random scribble out to MMIO space less
> likely to cause this problem.
>
> Is there some linear mapping of the nvram that could be written to
> on these cards?
>