Re: PCI PM: Restore standard config registers of all devices early

[Linus Torvalds]

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.

		Linus
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