ASoC: core: Make snd_soc_unregister_card() return void

The function snd_soc_unregister_card() returned 0 unconditionally and most
callers don't care to check the return value. Make it return void and
adapt the callers that didn't ignore the return value before.

This is a preparation for making platform remove callbacks return void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220621145834.198519-1-u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -426,7 +426,7 @@ enum snd_soc_pcm_subclass {
 };
 
 int snd_soc_register_card(struct snd_soc_card *card);
-int snd_soc_unregister_card(struct snd_soc_card *card);
+void snd_soc_unregister_card(struct snd_soc_card *card);
 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card);
 #ifdef CONFIG_PM_SLEEP
 int snd_soc_suspend(struct device *dev);

sound/soc/atmel/mikroe-proto.c

@@ -157,7 +157,9 @@ static int snd_proto_probe(struct platform_device *pdev)
 
 static int snd_proto_remove(struct platform_device *pdev)
 {
-	return snd_soc_unregister_card(&snd_proto);
+	snd_soc_unregister_card(&snd_proto);
+
+	return 0;
 }
 
 static const struct of_device_id snd_proto_of_match[] = {

sound/soc/fsl/pcm030-audio-fabric.c

@@ -113,12 +113,11 @@ static int pcm030_fabric_probe(struct platform_device *op)
 static int pcm030_fabric_remove(struct platform_device *op)
 {
 	struct pcm030_audio_data *pdata = platform_get_drvdata(op);
-	int ret;
 
-	ret = snd_soc_unregister_card(pdata->card);
+	snd_soc_unregister_card(pdata->card);
 	platform_device_unregister(pdata->codec_device);
 
-	return ret;
+	return 0;
 }
 
 static const struct of_device_id pcm030_audio_match[] = {

sound/soc/soc-core.c

@@ -2319,14 +2319,12 @@ EXPORT_SYMBOL_GPL(snd_soc_register_card);
  * @card: Card to unregister
  *
  */
-int snd_soc_unregister_card(struct snd_soc_card *card)
+void snd_soc_unregister_card(struct snd_soc_card *card)
 {
 	mutex_lock(&client_mutex);
 	snd_soc_unbind_card(card, true);
 	mutex_unlock(&client_mutex);
 	dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
 

sound/soc/soc-topology-test.c

@@ -271,9 +271,7 @@ static void snd_soc_tplg_test_load_with_null_comp(struct kunit *test)
 	KUNIT_EXPECT_EQ(test, 0, ret);
 
 	/* cleanup */
-	ret = snd_soc_unregister_card(&kunit_comp->card);
-	KUNIT_EXPECT_EQ(test, 0, ret);
-
+	snd_soc_unregister_card(&kunit_comp->card);
 	snd_soc_unregister_component(test_dev);
 }