Messages in this thread |  | | | Date | Mon, 2 Feb 2009 14:15:43 -0800 (PST) | | From | Linus Torvalds <> | | Subject | Re: PCI PM: Restore standard config registers of all devices early |
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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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