Messages in this thread | | | Date | Sat, 11 Jan 2003 23:48:19 +0100 | From | Vojtech Pavlik <> | Subject | Re: [PATCH] sl82c105 driver update |
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On Sat, Jan 11, 2003 at 11:44:15PM +0100, Benjamin Herrenschmidt wrote:
> On Sat, 2003-01-11 at 23:32, Russell King wrote: > > On Sat, Jan 11, 2003 at 05:33:19PM +0100, Benjamin Herrenschmidt wrote: > > > Enclosed is an update to the sl82c105 driver against 2.4.21-pre3, I'll > > > produce a 2.5 version once this is accepted by Alan. > > > > Its still broken - if it uses DMA, the ide core will call ide_dma_on, > > which will call config_for_dma(), which will call ide_config_drive_speed, > > which will then call ide_dma_on, etc. > > > > Sorry, I don't have a solution off hand for this. I just wish that > > the IDE core didn't change in these incompatible ways during a stable > > kernel release. > > No this problem is not here, at least not in 2.4, I did test it ;) > > ide_config_drive_speed will call ide_dma_host_on, not ide_dma_on. > > 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.
-- Vojtech Pavlik SuSE Labs - 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/
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