multiple separate pci bridges ...

Geert Uytterhoeven geert at
Mon Jan 19 21:08:42 EST 2004

On Mon, 19 Jan 2004, Benjamin Herrenschmidt wrote:
> > I am returning 0 for all of function 0. I dropped the whole struct
> > pci_dev ressource thingy, and they are well nullified. My limited
> > understanding of those pci issues let me make a guess though. I think
> > that either the stuff in the struct pci_dev is set later on (the BARs
> > are modifiable i think), or those values are read from the struct
> > pci_dev before i nullify them.
> pci_dev resources are read from the BARs and the sizing mecanism
> uses the BARs too (you should filter out writes too btw). If you
> properly filter things out, there should be no problem.

So shouldn't reads from the BAR return -1 instead of 0, and writes be ignored?



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds

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