Messages in this thread |  | | Subject | Re: [PATCH] sl82c105 driver update | From | Benjamin Herrenschmidt <> | Date | 12 Jan 2003 00:12:07 +0100 |
| |
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/
|  |