[PATCH] powerpc: Fix irq routing on some PowerMac 32 bits

[Benjamin Herrenschmidt]

> The problem was induced by PCI bridge just as Haiying explained. Until
> now, we do not describe PCI bridge in device tree. Only PCI host has the
> "reg" property. We can not identify the PCI device on bus 0 or bus 1 by
> node in device tree. The difference between device tree and OF might
> introduce potential bugs for PCI bus. We should consider the difference.

That's fine, there is no problem in doing that, though I do recommend as
a general rule to put PCI-to-PCI bridges that are soldered on the board
in the device-tree, you don't absolutely have to.
 
> > In any case, a patch is definitely needed to properly check for NULL
> > and
> > should get into 2.6.20, so if you want to do it, it will be much
> > welcome !
> I will provide it later.

This urgent, I'll do a patch myself and send it to paulus.

Ben.