ASoC: topology: Consolidate how dtexts and dvalues are freed

Provide helper functions and use them to free dtexts and dvalues in
topology. This is followup cleanup after related changes in this area as
suggested in:
https://mailman.alsa-project.org/pipermail/alsa-devel/2019-January/144761.htmlSigned-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-topology.c

@@ -86,6 +86,8 @@ snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
 struct snd_soc_dapm_widget *
 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
 			 const struct snd_soc_dapm_widget *widget);
+static void soc_tplg_denum_remove_texts(struct soc_enum *se);
+static void soc_tplg_denum_remove_values(struct soc_enum *se);
 
 /* check we dont overflow the data for this control chunk */
 static int soc_tplg_check_elem_count(struct soc_tplg *tplg, size_t elem_size,
@@ -398,7 +400,6 @@ static void remove_enum(struct snd_soc_component *comp,
 {
 	struct snd_card *card = comp->card->snd_card;
 	struct soc_enum *se = container_of(dobj, struct soc_enum, dobj);
-	int i;
 
 	if (pass != SOC_TPLG_PASS_MIXER)
 		return;
@@ -409,10 +410,8 @@ static void remove_enum(struct snd_soc_component *comp,
 	snd_ctl_remove(card, dobj->control.kcontrol);
 	list_del(&dobj->list);
 
-	kfree(dobj->control.dvalues);
-	for (i = 0; i < se->items; i++)
-		kfree(dobj->control.dtexts[i]);
-	kfree(dobj->control.dtexts);
+	soc_tplg_denum_remove_values(se);
+	soc_tplg_denum_remove_texts(se);
 	kfree(se);
 }
 
@@ -480,15 +479,12 @@ static void remove_widget(struct snd_soc_component *comp,
 			struct snd_kcontrol *kcontrol = w->kcontrols[i];
 			struct soc_enum *se =
 				(struct soc_enum *)kcontrol->private_value;
-			int j;
 
 			snd_ctl_remove(card, kcontrol);
 
 			/* free enum kcontrol's dvalues and dtexts */
-			kfree(se->dobj.control.dvalues);
-			for (j = 0; j < se->items; j++)
-				kfree(se->dobj.control.dtexts[j]);
-			kfree(se->dobj.control.dtexts);
+			soc_tplg_denum_remove_values(se);
+			soc_tplg_denum_remove_texts(se);
 
 			kfree(se);
 			kfree(w->kcontrol_news[i].name);
@@ -956,14 +952,23 @@ static int soc_tplg_denum_create_texts(struct soc_enum *se,
 		}
 	}
 
+	se->items = le32_to_cpu(ec->items);
 	se->texts = (const char * const *)se->dobj.control.dtexts;
 	return 0;
 
 err:
+	se->items = i;
+	soc_tplg_denum_remove_texts(se);
+	return ret;
+}
+
+static inline void soc_tplg_denum_remove_texts(struct soc_enum *se)
+{
+	int i = se->items;
+
 	for (--i; i >= 0; i--)
 		kfree(se->dobj.control.dtexts[i]);
 	kfree(se->dobj.control.dtexts);
-	return ret;
 }
 
 static int soc_tplg_denum_create_values(struct soc_enum *se,
@@ -988,6 +993,11 @@ static int soc_tplg_denum_create_values(struct soc_enum *se,
 	return 0;
 }
 
+static inline void soc_tplg_denum_remove_values(struct soc_enum *se)
+{
+	kfree(se->dobj.control.dvalues);
+}
+
 static int soc_tplg_denum_create(struct soc_tplg *tplg, unsigned int count,
 	size_t size)
 {
@@ -1035,7 +1045,6 @@ static int soc_tplg_denum_create(struct soc_tplg *tplg, unsigned int count,
 		se->shift_r = tplc_chan_get_shift(tplg, ec->channel,
 			SNDRV_CHMAP_FL);
 
-		se->items = le32_to_cpu(ec->items);
 		se->mask = le32_to_cpu(ec->mask);
 		se->dobj.index = tplg->index;
 		se->dobj.type = SND_SOC_DOBJ_ENUM;
@@ -1381,7 +1390,7 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
 	struct snd_kcontrol_new *kc;
 	struct snd_soc_tplg_enum_control *ec;
 	struct soc_enum *se;
-	int i, j, err;
+	int i, err;
 
 	kc = kcalloc(num_kcontrols, sizeof(*kc), GFP_KERNEL);
 	if (kc == NULL)
@@ -1476,10 +1485,8 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
 		if (!se)
 			continue;
 
-		kfree(se->dobj.control.dvalues);
-		for (j = 0; j < ec->items; j++)
-			kfree(se->dobj.control.dtexts[j]);
-		kfree(se->dobj.control.dtexts);
+		soc_tplg_denum_remove_values(se);
+		soc_tplg_denum_remove_texts(se);
 
 		kfree(se);
 		kfree(kc[i].name);