Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: PCI PM: Restore standard config registers of all devices early | Date | Mon, 2 Feb 2009 23:33:50 +0100 |
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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.
Thanks, Rafael
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