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    SubjectRe: [PATCH 08/18] PCI, powerpc: Register busn_res for root buses
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    On Tue, 2012-02-28 at 16:31 -0700, Bjorn Helgaas wrote:
    > We may need mechanism to say "don't trust this info from the
    > firmware," but we should be able to figure out a way that doesn't
    > penalize platforms that do everything correctly. The current patch
    > breaks these scenarios even when the platform firmware is 100%
    > correct.

    On the other hand, our firmwares tend not to be and the vast majority of
    our platforms have separate bus number domains (In fact I'm not sure
    whether we have one that actually splits bus numbers or not, maybe some
    ancient Apple gear, I need to double check).

    We did use to force renumbering on macs to avoid bus number collisions
    between domains because of ancient X servers that didn't do domains
    properly but I think we dropped that.

    Cheers,
    Ben.




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