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    SubjectRe: [PATCH] sl82c105 driver update
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    On Sat, 2003-01-11 at 23:48, Vojtech Pavlik wrote:

    > > Note that I think sl82c105 and ide-pmac are the only ones to redo the
    > > DMA config on ide_dma_on. Most chipsets only do it on ide_dma_check, but
    > > I chosed to do it in ide_dma_on too mostly because I found no way to
    > > re-trigger ide_dma_check from hdparm (well, this might have changed
    > > since, I have to dbl check).
    >
    > Correct, and it seems that if you have automatic DMA disabled in the
    > kernel and then use hdparm -d1, this leads to a lot of trouble.

    Which is why I did that in the first place on pmac, so that hdparm -d1
    gave proper timings in the first place (my firmware does nothing useful
    and I hard reset the drives & controller on boot anyway).


    --
    Benjamin Herrenschmidt <benh@kernel.crashing.org>
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