Messages in this thread |  | | Subject | Re: Linux 2.4.21-pre3-ac4 | From | Benjamin Herrenschmidt <> | Date | 14 Jan 2003 18:38:13 +0100 |
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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...
Ben.
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