ASoC: core: Add platform component mutex

Add mutex support for platform IO operations. e.g. can be used
for platform DAPM widget IO ops.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 7978f6c01ef7..c90bb0110bd2 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3382,6 +3382,7 @@ int snd_soc_register_platform(struct device *dev,
         platform->dapm.dev = dev;
         platform->dapm.platform = platform;
         platform->dapm.stream_event = platform_drv->stream_event;
+        mutex_init(&platform->mutex);
 
         mutex_lock(&client_mutex);
         list_add(&platform->list, &platform_list);