ASoC: pcm: Fix DPCM for aux_devs

When we instantiate an aux_dev we use a fake rtd as part of the process
which doesn't have a dai_link associated with it. Fix the dpcm startup
code to cope with this.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index c0b394fdd689..4f824cbd66f4 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2332,6 +2332,9 @@ static const struct file_operations dpcm_state_fops = {
 
 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
 {
+        if (!rtd->dai_link)
+                return 0;
+
         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
                         rtd->card->debugfs_card_root);
         if (!rtd->debugfs_dpcm_root) {