[alsa-devel] [PATCH] ASoC: core - Fix dai usage in pcm_new() platform handlers

Daniel Mack zonque at gmail.com
Wed Jun 22 20:45:44 CEST 2011

On Wed, Jun 22, 2011 at 8:36 PM, Mark Brown
<broonie at opensource.wolfsonmicro.com> wrote:
> On Wed, Jun 22, 2011 at 08:21:06PM +0200, Daniel Mack wrote:
>> I thought so too, but I'm facing an Ooops on 3.0.0-rc4, while the same
>> platform code was running fine on 2.6.39. And while searching for
>> potential reasons for this regression, this commit was quite obvious.
>> But maybe that's indeed fixing the wrong side. What happens is that
>> pxa2xx_pcm_preallocate_dma_buffer() is called for
>> SNDRV_PCM_STREAM_CAPTURE, but pcm->streams[1].substream is NULL.
> Is this the same issue that Timur was having where he was relying on the
> channel count of one of the DAI drivers to tell him if the substream was
> allocated instead of looking to see if the substream was allocated which
> is the more direct and reliable thing to do?  Looking at the code it
> appears that's the case for PXA.

And so the bug was always there, it was just hidden by another bug.
Thanks for the pointer :)


More information about the Alsa-devel mailing list