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, 29 insertions, 11 deletions

diff --git a/sound/soc/s6000/s6000-pcm.c b/sound/soc/s6000/s6000-pcm.c
index 1d61109e09fa..9c7f7f00cebb 100644
--- a/sound/soc/s6000/s6000-pcm.c
+++ b/sound/soc/s6000/s6000-pcm.c
@@ -58,13 +58,15 @@ static void s6000_pcm_enqueue_dma(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct s6000_runtime_data *prtd = runtime->private_data;
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	int channel;
 	unsigned int period_size;
 	unsigned int dma_offset;
 	dma_addr_t dma_pos;
 	dma_addr_t src, dst;
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	period_size = snd_pcm_lib_period_bytes(substream);
 	dma_offset = prtd->period * period_size;
 	dma_pos = runtime->dma_addr + dma_offset;
@@ -101,7 +103,8 @@ static irqreturn_t s6000_pcm_irq(int irq, void *data)
 {
 	struct snd_pcm *pcm = data;
 	struct snd_soc_pcm_runtime *runtime = pcm->private_data;
-	struct s6000_pcm_dma_params *params = runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *params =
+		snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
 	struct s6000_runtime_data *prtd;
 	unsigned int has_xrun;
 	int i, ret = IRQ_NONE;
@@ -172,11 +175,13 @@ static int s6000_pcm_start(struct snd_pcm_substream *substream)
 {
 	struct s6000_runtime_data *prtd = substream->runtime->private_data;
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	unsigned long flags;
 	int srcinc;
 	u32 dma;
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	spin_lock_irqsave(&prtd->lock, flags);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -212,10 +217,12 @@ static int s6000_pcm_stop(struct snd_pcm_substream *substream)
 {
 	struct s6000_runtime_data *prtd = substream->runtime->private_data;
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	unsigned long flags;
 	u32 channel;
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		channel = par->dma_out;
 	else
@@ -236,9 +243,11 @@ static int s6000_pcm_stop(struct snd_pcm_substream *substream)
 static int s6000_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	int ret;
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	ret = par->trigger(substream, cmd, 0);
 	if (ret < 0)
 		return ret;
@@ -275,13 +284,15 @@ static int s6000_pcm_prepare(struct snd_pcm_substream *substream)
 static snd_pcm_uframes_t s6000_pcm_pointer(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct s6000_runtime_data *prtd = runtime->private_data;
 	unsigned long flags;
 	unsigned int offset;
 	dma_addr_t count;
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	spin_lock_irqsave(&prtd->lock, flags);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
@@ -305,11 +316,12 @@ static snd_pcm_uframes_t s6000_pcm_pointer(struct snd_pcm_substream *substream)
 static int s6000_pcm_open(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct s6000_runtime_data *prtd;
 	int ret;
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
 	snd_soc_set_runtime_hwparams(substream, &s6000_pcm_hardware);
 
 	ret = snd_pcm_hw_constraint_step(runtime, 0,
@@ -364,7 +376,7 @@ static int s6000_pcm_hw_params(struct snd_pcm_substream *substream,
 				 struct snd_pcm_hw_params *hw_params)
 {
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par;
 	int ret;
 	ret = snd_pcm_lib_malloc_pages(substream,
 				       params_buffer_bytes(hw_params));
@@ -373,6 +385,8 @@ static int s6000_pcm_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
+	par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	if (par->same_rate) {
 		spin_lock(&par->lock);
 		if (par->rate == -1 ||
@@ -392,7 +406,8 @@ static int s6000_pcm_hw_params(struct snd_pcm_substream *substream,
 static int s6000_pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
-	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *par =
+		snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
 
 	spin_lock(&par->lock);
 	par->in_use &= ~(1 << substream->stream);
@@ -417,7 +432,8 @@ static struct snd_pcm_ops s6000_pcm_ops = {
 static void s6000_pcm_free(struct snd_pcm *pcm)
 {
 	struct snd_soc_pcm_runtime *runtime = pcm->private_data;
-	struct s6000_pcm_dma_params *params = runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *params =
+		snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
 
 	free_irq(params->irq, pcm);
 	snd_pcm_lib_preallocate_free_for_all(pcm);
@@ -429,9 +445,11 @@ static int s6000_pcm_new(struct snd_card *card,
 			 struct snd_soc_dai *dai, struct snd_pcm *pcm)
 {
 	struct snd_soc_pcm_runtime *runtime = pcm->private_data;
-	struct s6000_pcm_dma_params *params = runtime->dai->cpu_dai->dma_data;
+	struct s6000_pcm_dma_params *params;
 	int res;
 
+	params = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream);
+
 	if (!card->dev->dma_mask)
 		card->dev->dma_mask = &s6000_pcm_dmamask;
 	if (!card->dev->coherent_dma_mask)