ASoC: Add w->kcontrols, and populate it

Future changes will need reference to the kcontrol created for a given
kcontrol_new. Store the created kcontrol values now.

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

include/sound/soc-dapm.h

@@ -474,6 +474,7 @@ struct snd_soc_dapm_widget {
 	/* kcontrols that relate to this widget */
 	int num_kcontrols;
 	const struct snd_kcontrol_new *kcontrol_news;
+	struct snd_kcontrol **kcontrols;
 
 	/* widget input and outputs */
 	struct list_head sources;

sound/soc/soc-dapm.c

@@ -400,6 +400,7 @@ static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,
 				path->long_name = NULL;
 				return ret;
 			}
+			w->kcontrols[i] = path->kcontrol;
 		}
 	}
 	return ret;
@@ -442,6 +443,8 @@ static int dapm_new_mux(struct snd_soc_dapm_context *dapm,
 	if (ret < 0)
 		goto err;
 
+	w->kcontrols[0] = kcontrol;
+
 	list_for_each_entry(path, &w->sources, list_sink)
 		path->kcontrol = kcontrol;
 
@@ -1480,6 +1483,7 @@ static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
 			kfree(p->long_name);
 			kfree(p);
 		}
+		kfree(w->kcontrols);
 		kfree(w->name);
 		kfree(w);
 	}
@@ -1730,6 +1734,14 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
 		if (w->new)
 			continue;
 
+		if (w->num_kcontrols) {
+			w->kcontrols = kzalloc(w->num_kcontrols *
+						sizeof(struct snd_kcontrol *),
+						GFP_KERNEL);
+			if (!w->kcontrols)
+				return -ENOMEM;
+		}
+
 		switch(w->id) {
 		case snd_soc_dapm_switch:
 		case snd_soc_dapm_mixer: