At Fri, 1 May 2009 12:32:41 +0100,
Mark Brown wrote:
>
> On Thu, Apr 30, 2009 at 02:29:41PM -0500, Gabriel Johnson wrote:
>
> > is working. Now using the ioctl to get mmap address of the dma space
> > isn't working, I get a kernel machine check error:
>
> ...
>
> > Should the default mmap ioctl functions work on powerpc?
>
> I know that there were some problems with PowerPC memory access,
> unfortunately I don't know any specifics or if these issues are fixed in
> current kernels. Searching for postings by Takashi Iwai on the PowerPC
> kernel lists might turn something up.
The ALSA mmap support on non-coherent architecture is still buggy.
Some test patches are found in sound.git tree test/dma-fix branch.
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
The sound-unstable tree already merges this branch. Try that tree instead.
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-unstable-2.6.git
Takashi
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