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SubjectRe: Linux 2.4.21-pre3-ac4
Benjamin Herrenschmidt wrote:

>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...
I believe that this will corrupt any inprogress UDMA transfer on the
promise 20265 chip and probably others. It would be better to read the
dma registers for the Promise controllers.


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