Messages in this thread | | | Date | Tue, 18 May 2010 17:22:38 -0600 | Subject | Re: [PATCH] x86: Disable HPET MSI on ATI SB700/SB800 | From | Robert Hancock <> |
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On Tue, May 18, 2010 at 2:45 AM, Andi Kleen <andi@firstfloor.org> wrote: >> If one wanted, you could disable HPET MSI on this chipset only when a >> driver requests an ISA DMA channel. Then if there's no floppy or other LPC >> DMA device present, it can stay enabled. I don't know if it's worth the >> trouble, though. > > There can be LPC devices which are not visible to the kernel, > but only used through ACPI or the BIOS. Think of fancy fan > controllers and similar.
I would hope they wouldn't use DMA without kernel knowledge, otherwise that really would be an abomination..
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