ASoC: dapm: Add unlocked version of snd_soc_dapm_sync

We will often call sync after several functions that require the DAPM
mutex to be held. Rather than release and immediately relock the mutex
provide an unlocked function for this situation.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 6e89ef6c11c1a42c853a8f87021bbf1244a14ffc..3b991766a8f2edef8d97f613eda3843a22ae4de8 100644 (file)
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -461,6 +461,7 @@ int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
                                const char *pin);
 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm);
+int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm);
 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
                                  const char *pin);
 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 48a4eeb05192835acbef9bef76f98d16320b713f..4200f96a1483eb82dacc35b59704c5d0351ce1cc 100644 (file)
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2342,18 +2342,18 @@ static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
 }
 
 /**
- * snd_soc_dapm_sync - scan and power dapm paths
+ * snd_soc_dapm_sync_unlocked - scan and power dapm paths
  * @dapm: DAPM context
  *
  * Walks all dapm audio paths and powers widgets according to their
  * stream or path usage.
  *
+ * Requires external locking.
+ *
  * Returns 0 for success.
  */
-int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
+int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
 {
-       int ret;
-
        /*
         * Suppress early reports (eg, jacks syncing their state) to avoid
         * silly DAPM runs during card startup.
@@ -2361,8 +2361,25 @@ int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
        if (!dapm->card || !dapm->card->instantiated)
                return 0;
 
+       return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
+
+/**
+ * snd_soc_dapm_sync - scan and power dapm paths
+ * @dapm: DAPM context
+ *
+ * Walks all dapm audio paths and powers widgets according to their
+ * stream or path usage.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
+{
+       int ret;
+
        mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
-       ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
+       ret = snd_soc_dapm_sync_unlocked(dapm);
        mutex_unlock(&dapm->card->dapm_mutex);
        return ret;
 }