ANDROID: ASoC: core: add locked version of soc_find_component

Add a locked version of the API to use from clients
to ensure accessing component list safely.

Change-Id: I73c7f2ed03b7e76f6816b62ba0974bc05bdbb4b4
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>
(cherry picked from commit 99b4176aaa40d18f46ae637a41578842e6c85abe)
Signed-off-by: Will McVicker <willmcvicker@google.com>

sound/soc/soc-core.c

@@ -748,6 +748,28 @@ struct snd_soc_component *soc_find_component(
 }
 EXPORT_SYMBOL(soc_find_component);
 
+/**
+ * soc_find_component_locked: soc_find_component with client lock acquired
+ *
+ * @of_node: of_node of the component to query.
+ * @name: name of the component to query.
+ *
+ * function to find out if a component is already registered with ASoC core.
+ *
+ * Returns component handle for success, else NULL error.
+ */
+struct snd_soc_component *soc_find_component_locked(
+	const struct device_node *of_node, const char *name)
+{
+	struct snd_soc_component *component = NULL;
+
+	mutex_lock(&client_mutex);
+	component = soc_find_component(of_node, name);
+	mutex_unlock(&client_mutex);
+	return component;
+}
+EXPORT_SYMBOL(soc_find_component_locked);
+
 /**
  * snd_soc_find_dai - Find a registered DAI
  *