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    SubjectRe: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM
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    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.

    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?


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