[PATCH 02/17 v2] ASoC: dapm: Add helpers to lock/unlock DAPM mutex

[Charles Keepax <ckeepax@opensource.wolfsonmicro.com>]

Acquiring the DAPM mutex is necessary before using several DAPM
functions and dereference is quite ugly. This patch provides a helper
function to simplify this.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 include/sound/soc.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 21038e0..dc46623 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1204,4 +1204,15 @@ extern struct dentry *snd_soc_debugfs_root;
 
 extern const struct dev_pm_ops snd_soc_pm_ops;
 
+/* Helper functions */
+static inline void snd_soc_dapm_mutex_lock(struct snd_soc_dapm_context *dapm)
+{
+	mutex_lock(&dapm->card->dapm_mutex);
+}
+
+static inline void snd_soc_dapm_mutex_unlock(struct snd_soc_dapm_context *dapm)
+{
+	mutex_unlock(&dapm->card->dapm_mutex);
+}
+
 #endif
-- 
1.7.2.5