Re: IBM Thinkpad G41 PCMCIA problems [Was: Yenta TI: ... no PCIinterrupts. Fish. Please report.]

[Linus Torvalds]

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
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