ASoC: SOF: fix an Oops, caused by invalid topology

[sfrench/cifs-2.6.git] / sound / soc / sof / pcm.c

diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index 314f3095c12fbd472d2890d0205f5b4a01452f19..29435ba2d32927ea6cd4fd2154d5ac59d6eb3483 100644 (file)
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -591,6 +591,11 @@ static int sof_pcm_new(struct snd_soc_component *component,
                "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
                caps->name, caps->buffer_size_min, caps->buffer_size_max);
 
+       if (!pcm->streams[stream].substream) {
+               dev_err(component->dev, "error: NULL playback substream!\n");
+               return -EINVAL;
+       }
+
        snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
                                   SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
                                   le32_to_cpu(caps->buffer_size_min),
@@ -609,6 +614,11 @@ capture:
                "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
                caps->name, caps->buffer_size_min, caps->buffer_size_max);
 
+       if (!pcm->streams[stream].substream) {
+               dev_err(component->dev, "error: NULL capture substream!\n");
+               return -EINVAL;
+       }
+
        snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
                                   SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
                                   le32_to_cpu(caps->buffer_size_min),