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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