1 files changed, 10 insertions, 1 deletions

diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index ff32f892287e..35e8fa3a469c 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -76,13 +76,18 @@ static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
         struct snd_pcm_runtime *runtime = substream->runtime;
         struct pxa2xx_runtime_data *prtd = runtime->private_data;
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
-        struct pxa2xx_pcm_dma_params *dma = rtd->cpu_dai->dma_data;
+        struct pxa2xx_pcm_dma_params *dma = rtd->dai->cpu_dai->dma_data;
         size_t totsize = params_buffer_bytes(params);
         size_t period = params_period_bytes(params);
         pxa_dma_desc *dma_desc;
         dma_addr_t dma_buff_phys, next_desc_phys;
         int ret;
 
+        /* return if this is a bufferless transfer e.g.
+         * codec <--> BT codec or GSM modem -- lg FIXME */
+         if (!dma)
+                return 0;
+
         /* this may get called several times by oss emulation
          * with different params */
         if (prtd->params == NULL) {
@@ -227,6 +232,10 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
         if (ret)
                 goto out;
 
+        ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+        if (ret < 0)
+                goto out;
+
         prtd = kzalloc(sizeof(struct pxa2xx_runtime_data), GFP_KERNEL);
         if (prtd == NULL) {
                 ret = -ENOMEM;