Messages in this thread |  | | | Date | Tue, 19 Jun 2007 19:51:19 +0400 | | From | Sergei Shtylyov <> | | Subject | Re: [BUG] ide dma_timer_expiry, then hard lockup |
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Mark Lord wrote:
>>>>>> I can prepare a patch, but only with a lot of guidance. I can test >>>>>> & debug, I'm highly motivated just right now ...
>>>>> If you've got a nice repeatable problem please try using the libata >>>>> driver. That handles the error paths differently and doesn't try a >>>>> FIFO >>>>> drain which might matter in this case I guess.
>>>> FIFO drain for DMA commands?
>>> Welcome to the old IDE layer which I am so glad I left behind 8)
>>> ide_ata_error will try and do a PIO flush regardless of the command type >>> if DRQ_STAT is asserted. See ide_dma_intr -> ide_error -> ...
>> Indeed... but the thing is we don't know what's asserted in this >> case -- remember, it's reading the status register that locks >> everything up...
> Exactly. And IORDY shouldn't really apply there, > unless some nitwit standards person wrote it into a spec..
Wrote what? IORDY throttling does *apply* to both data and non-data register accesses, of course.
> -ml
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