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> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Jan 15 2003 - 22:00:38 EST