Messages in this thread | | | Date | Tue, 19 Jun 2007 11:38:41 -0400 | From | Mark Lord <> | Subject | Re: [BUG] ide dma_timer_expiry, then hard lockup |
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Sergei Shtylyov wrote: > Alan Cox 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..
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