Messages in this thread | | | Date | Sun, 26 Feb 2006 15:32:45 -0500 | From | Mark Lord <> | Subject | Re: hda: irq timeout: status=0xd0 DMA question |
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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.
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