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    SubjectRe: [patch 2.5.65] ehci-hcd, don't use PCI MWI
    Jeff Garzik wrote:
    > On Wed, Mar 19, 2003 at 07:21:42AM -0800, David Brownell wrote:
    >
    >>Hi,
    >>
    >>Some users have been sending init logs for Athlon kernels that
    >>include PCI warning messages about the PCI cache line size
    >>getting set incorrectly ... where the kernel thinks that the
    >>right value is 16 bytes. Since 64 bytes is the right number,
    >>it's dangerous to enable MWI on such systems.
    >>
    >>This patch stops trying to use MWI; it's a workaround for the
    >>misbehavior of that PCI cacheline-setting code. Please apply
    >>to 2.5 and 2.4 trees.
    >
    >
    > Please don't -- Ivan has a patch for this, let's get that in instead.

    I'd be happy with that, except on the 2.4 trees where we haven't
    seen such a patch yet. (So Greg -- please hold off on this
    for 2.5 unless/until it becomes clear Ivan's patch won't happen.)

    > We all acknowledge your patch is a workaround, but this sort of fix does
    > not belong in the mainstream kernel. We want to fix it The Right
    > Way(tm), once. And since a patch already exists for this...

    Yep, I figured CC'ing LKML would help move things forward ... :)

    - Dave



    > We need to get IvanK's extended-save-restore-state patch in, too.
    >
    > Ivan, would you be up for a repost on lkml?
    >
    > Jeff
    >
    >
    >
    >



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