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    SubjectRe: [PATCH 1/1] pci: Block config access during BIST (resend)
    On Sun, 2005-01-16 at 05:48 +0100, Andi Kleen wrote:
    > > Right. Though I think the "will be back soon" and "is invisible" are
    > > pretty much the same thing. That is, in both our cases (BIST and pmac
    > > PM), we want the device to still be visible to userland, as it actually
    > > exist, should be properly detected by userland config tools etc..., but
    > > may only be actually enabled when the interface is opened/used for PM
    > > reasons.
    > I just request that this shouldn't be done in the low level pci_config_read_*
    > functions. Please keep them simple and lean. If you want such complex
    > semantics for user space do it in a separate layer.

    What is complex in there ? I agree it's not convenient to do this from
    the very low level ones that don't take the pci_dev * as an argument,
    but from the higher level ones that does, the overhead is basically to
    test a flag in the pci_dev, I doubt it will be significant in any way
    performance wise, especially compared to the cost of a config space


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