At Mon, 22 Jun 2009 08:34:38 +1000,
Benjamin Herrenschmidt wrote:

On Sun, 2009-06-21 at 20:18 +0200, Gerhard Pircher wrote:

quoted

Hi,

Takashi Iwai posted patches to make ALSA work on non-coherent PPC32
systems (almost exactly) a year ago. See here:
http://www.nabble.com/-PATCH-0-3--ALSA-fixes-for-non-coherent-ppc32-to17980027.html#a17980027

As far as I can see these patches never went upstream. Where there any
objections or did we just forget about them? It would be cool, if the
patches could be merged now, as at least two platforms need this bugfix
(namely Sam440 and AmigaOne).

I definitely forgot about those...

Me, too, almost... :)

But I'm fine with what Takashi did
for now, I can always make the powerpc helper for dma_mmap_coherent()
smarter later on if necessary.

I updated the patch series for 2.6.31, including sparc32, parisc, mips
and sh support.  The patches are found in test/dma-fix branch of sound
git tree:
 git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git test/dma-fix

The old patches for 2.6.30 is found at history/dma-fix-2.6.30 branch
there, too.


For merging to the upstream, we'll need definitely discussions on
linux-arch ML or so, as once James Bottomley suggested.  I'll try to
make it up once after the merge window.

But, it'd be helpful if someone can test the patches above beforehand,
of course :)


thanks,

Takashi