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SubjectRe: hda: irq timeout: status=0xd0 DMA question
Robert Hancock wrote:
> Henrik Persson wrote:
>> Does happen once or twice a year.. Probably something funky with the
>> cabling or some power-related issues.
>>
>> Anyway, I would be happy if the IDE driver would "just not do that". :)
>
> I can see the reasoning where the device just doesn't function properly
> with DMA at all (like on some Compact Flash-to-IDE adapters where the
> card claims to support DMA but the DMA lines aren't wired through in the
> adapter properly). In that case not disabling DMA would render it
> useless. The IDE layer could keep track of whether DMA was previously
> working on that device however, and not disable DMA on reset if it had
> previously been working.

Definitely. Where these things get sticky is in defining "DMA was working".
And keeping track of it separately for reads and writes.

cheers
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