ALSA: ASoC: move dma_data from snd_soc_dai to snd_soc_pcm_stream

This fixes a memory corruption when ASoC devices are used in
full-duplex mode. Specifically for pxa-ssp code, where this pointer
is dynamically allocated for each direction and destroyed upon each
stream start.

All other platforms are fixed blindly, I couldn't even compile-test
them. Sorry for any breakage I may have caused.

[Note that this is a backported version for 2.6.34.
 Upstream commit is fd23b7dee]

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Reported-by: Michael Hirsch <m.hirsch@raumfeld.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
index bdd1097c7b13..39456447132c 100644
--- a/sound/soc/omap/omap-pcm.c
+++ b/sound/soc/omap/omap-pcm.c
@@ -99,9 +99,11 @@ static int omap_pcm_hw_params(struct snd_pcm_substream *substream,
         struct snd_pcm_runtime *runtime = substream->runtime;
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct omap_runtime_data *prtd = runtime->private_data;
-        struct omap_pcm_dma_data *dma_data = rtd->dai->cpu_dai->dma_data;
+        struct omap_pcm_dma_data *dma_data;
         int err = 0;
 
+        dma_data = snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);
+
         /* return if this is a bufferless transfer e.g.
          * codec <--> BT codec or GSM modem -- lg FIXME */
         if (!dma_data)