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    SubjectRe: IBM Thinkpad G41 PCMCIA problems [Was: Yenta TI: ... no PCI interrupts. Fish. Please report.]
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    Date
    On Sat, 2005-02-19 at 20:02 -0800, Linus Torvalds wrote:
    >
    > On Sat, 19 Feb 2005, Steven Rostedt wrote:
    > >
    > > On Sat, 2005-02-19 at 18:10 -0800, Linus Torvalds wrote:
    > >
    > > > I _think_ it's the code in arch/i386/pci/fixup.c that does this. See the
    > > >
    > > > static void __devinit pci_fixup_transparent_bridge(struct pci_dev *dev)
    > > >
    > > > thing, and try to disable it. Maybe that rule is wrong, and triggers much
    > > > too often?
    > > >
    > >
    > > Linus,
    > >
    > > Thank you very much! That was it. The following patch made everything
    > > look good.
    >
    > Ok. I've fired off an email to some Intel people asking what the
    > real rules are wrt Intel PCI-PCI bridges. It may be that it's not that
    > particular chip, but some generic rule (like "all Intel bridges act like
    > they are subtractive decode _except_ if they actually have the IO
    > start/stop ranges set" or something like that).
    >
    > If anybody on the list can figure the Intel bridge decoding rules out,
    > please holler..
    >
    > Linus

    Actually, I've ran into a similar situation on my hardware. After
    looking into it for a while, I'm pretty sure it's actually a transparent
    bridge (despite it not indicating such in the programing interface class
    code). Have you heard anything more?

    Thanks,
    Adam


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