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SubjectRe: Linux 2.4.21-pre3-ac4
On Mon, 2003-01-13 at 20:46, Alan Cox wrote:
> > host shall wait 400 ns before reading the Status register. When entering
> > this state from the HPIOI2 state, the host shall wait one PIO transfer
> > cycle time before reading the Status register. The wait may be
> > accomplished by reading the Alternate Status register and ignoring the
> > result.
> Fatal on PIIX PIO

Ok, but PIIX runs on intel platforms with real IOs, so there is no need
to perform a read... If we go the hwif->IOSYNC() way, we might well set
it up to no-op on x86 PIO iops by default and read of alt-status on
other archs if it's safe enough on other controllers/drives...


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