On Tuesday 22 January 2008, Alan Cox wrote:
> > IDE pdc202xx_old host driver supports ATAPI DMA just fine and in line
> > with the PDC2026x programming guide.
>
> News to me. It didn't last time I tried it the driver selected PIO.
Hmmm...
commit f3d5b34caae393f13a9486036f98c81cac1595c4
Author: Tobias Oed <[EMAIL PROTECTED]>
Date: Tue Oct 3 01:14:17 2006 -0700
[PATCH] Enable cdrom dma access with pdc20265_old
This patch allows me to use dma with my cd/dvd attached to my on board
pdc20265 ide controller
...
Acked-by: Alan Cox <[EMAIL PROTECTED]>
Cc: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
...
Are you by any chance using PDC20263?
[ PDC2026{5,7} should be fine (unless somebody broke it but then git-bisect
should do the job)... ]
> > > So turn it ATAPI DMA off, these are disk optimised controllers.
> >
> > This is an acceptable workaround for 2.6.24 but it probably just hides
> > some deeper pata_pdc202xx_old or/and libata problem.
>
> Hard to be sure. No docs here for the older ones.
I lack the docs for PDC20263...
Bart
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