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    SubjectRe: PCI PM: Restore standard config registers of all devices early
    On Monday 02 February 2009, Linus Torvalds wrote:
    > On Mon, 2 Feb 2009, Rafael J. Wysocki wrote:
    > >
    > > I think it would be easier to make ACPI allow us to run AML with interrupts
    > > off.
    > Well, I'd agree, except I have this strong memory of us having known bugs
    > with ACPI turning hard-interrupts on again. Similarly, it uses mutexes etc
    > that simply don't work with interrupts off and/or may turn them on again
    > thanks to scheduling.
    > "Fixing" that seems not very easy. ACPI has a bad habit of being _really_
    > hard to fix in this area.
    > I do agree that _if_ we can just fix ACPI, we wouldn't have these issues,
    > and we should just call it with interrupts disabled with our existing
    > code. But my previous email was a "maybe we can do it like this" kind of
    > thing, which might allow us to use ACPI with none of the irq-off issues.

    Well, I think both will be difficult, this way or another. :-)

    I'll have a look at the ACPI thing.


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