Re: PATA failure with piix, works with libata

[Jeff Garzik]

Matthew Garrett wrote:
> On Sun, Mar 05, 2006 at 06:40:58PM -0500, Jeff Garzik wrote:
>
> > Matthew Garrett wrote:
> >
> > > Ok, it /seems/ that things are happier (though still not entirely happy) 
> > > if I explicitly acknowledge the interrupt by writing the dma status 
> > > register back again. This doesn't seem to be done anywhere in the IDE 
> > > interrupt routine, but is in the libata one. I'm afraid I don't 
> > > understand IDE well enough to have any idea what's going on here - is it 
> > > possible that a piix in native mode (rather than legacy mode) and 
> > > sharing an interrupt needs some special handling?
> >
> > ICH definitely needs that irq ack...
>
>
> Yeah, this is an ICH7. I can't find anything in drivers/ide that would 
> result in it being done, which is why I'm kind of confused. ide_ack_intr 
> seems to be defined to do nothing on x86 since IDE_ARCH_ACK_INTR isn't 
> defined there?

This is more a piix-specific behavior than an arch-specific behavior.

	Jeff



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