Re: PATCH: New fix for CardBus bridge behind a PCI bridge

From: Jeff Garzik (
Date: Sat Aug 17 2002 - 10:26:08 EST

H. J. Lu wrote:> On Fri, Aug 16, 2002 at 07:48:25PM +0400, Ivan
Kokshaysky wrote:
>>On Mon, Aug 12, 2002 at 08:29:42PM -0700, H. J. Lu wrote:
>>>I was told all PCI_CLASS_BRIDGE_PCI bridges were transparent. The non-
>>>transparent ones have class code PCI_CLASS_BRIDGE_OTHER. This new patch
>>>only checks PCI_CLASS_BRIDGE_PCI and works for me.
>>I guess that info came from Intel ;-) Interesting, but completely wrong.
>>The devices they call "non-transparent PCI-to-PCI bridges" aren't classic
>>PCI-to-PCI bridges at all, that's why they are PCI_CLASS_BRIDGE_OTHER.
>>It's more to do with CPU-to-CPU bridges.
>>In our terms, "transparent" PCI-to-PCI bridge means subtractive decoding one.
>>Your previous patch makes much more sense, although a) it should belong to
>>generic pci code b) is way incomplete.
>>Please try this one instead.
> CardBus works now. But I can no longer load usb-uhci. My X server no
> longer works. Your patch is not right.

I would be willing to bet there is some silliness in the X server, at
least. It's PCI code has always left a lot to be desired...


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