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    SubjectRe: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.
    Date
    Hi,

    David P. Reed <dpreed <at> reed.com> writes:

    > And actually, if I had looked at the /sys/bus/pnp definitions, rather
    > than /proc/ioports, I would have noticed that port 80 was part of a
    > PNP0C02 resource set. That means exactly one thing: ACPI says that
    > port 80 is NOT free to be used, for delays or anything else.

    I have some computers where port 0x80 is claimed by 8237A DMA controller [1]
    But in this case it seems a lasy acpi programmer that doesn't want to convert
    the hole in 0x80-0x8f range...


    PS : I post from gmane web interface, so I can't keep CC.

    [1]
    This happen with a old 7 years old siemens PIII and a new hp core2duo.
    state = active
    io 0x0-0xf
    io 0x80-0x8f
    io 0xc0-0xdf
    dma 4



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