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, 5 insertions, 2 deletions

diff --git a/sound/soc/pxa/pxa2xx-i2s.c b/sound/soc/pxa/pxa2xx-i2s.c
index 6b8f655d1ad8..c1a5275721e4 100644
--- a/sound/soc/pxa/pxa2xx-i2s.c
+++ b/sound/soc/pxa/pxa2xx-i2s.c
@@ -164,6 +164,7 @@ static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream,
 {
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+        struct pxa2xx_pcm_dma_params *dma_data;
 
         BUG_ON(IS_ERR(clk_i2s));
         clk_enable(clk_i2s);
@@ -171,9 +172,11 @@ static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream,
         pxa_i2s_wait();
 
         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-                cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_out;
+                dma_data = &pxa2xx_i2s_pcm_stereo_out;
         else
-                cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_in;
+                dma_data = &pxa2xx_i2s_pcm_stereo_in;
+
+        snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 
         /* is port used by another stream */
         if (!(SACR0 & SACR0_ENB)) {