ASoC: simple-card-utils: Make simple_util_remove() return void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code.  However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

simple_util_remove() returned zero unconditionally. Make it return void
instead and convert all users to struct platform_device::remove_new().

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Herve Codina <herve.codina@bootlin.com>
Link: https://lore.kernel.org/r/20231013221945.1489203-13-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Uwe Kleine-König

include/sound/simple_card_utils.h

@@ -188,7 +188,7 @@ int simple_util_init_aux_jacks(struct simple_util_priv *priv,
 				char *prefix);
 int simple_util_init_priv(struct simple_util_priv *priv,
 			       struct link_info *li);
-int simple_util_remove(struct platform_device *pdev);
+void simple_util_remove(struct platform_device *pdev);
 
 int graph_util_card_probe(struct snd_soc_card *card);
 int graph_util_is_ports0(struct device_node *port);

sound/soc/generic/audio-graph-card.c

@@ -644,7 +644,7 @@ static struct platform_driver graph_card = {
 		.of_match_table = graph_of_match,
 	},
 	.probe = graph_probe,
-	.remove = simple_util_remove,
+	.remove_new = simple_util_remove,
 };
 module_platform_driver(graph_card);
 

sound/soc/generic/audio-graph-card2-custom-sample.c

@@ -176,7 +176,7 @@ static struct platform_driver custom_card = {
 		.of_match_table = custom_of_match,
 	},
 	.probe	= custom_probe,
-	.remove	= simple_util_remove,
+	.remove_new = simple_util_remove,
 };
 module_platform_driver(custom_card);
 

sound/soc/generic/audio-graph-card2.c

@@ -1224,7 +1224,7 @@ static struct platform_driver graph_card = {
 		.of_match_table = graph_of_match,
 	},
 	.probe	= graph_probe,
-	.remove	= simple_util_remove,
+	.remove_new = simple_util_remove,
 };
 module_platform_driver(graph_card);
 

sound/soc/generic/simple-card-utils.c

@@ -958,13 +958,11 @@ int simple_util_init_priv(struct simple_util_priv *priv,
 }
 EXPORT_SYMBOL_GPL(simple_util_init_priv);
 
-int simple_util_remove(struct platform_device *pdev)
+void simple_util_remove(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = platform_get_drvdata(pdev);
 
 	simple_util_clean_reference(card);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(simple_util_remove);
 

sound/soc/generic/simple-card.c

@@ -827,7 +827,7 @@ static struct platform_driver simple_card = {
 		.of_match_table = simple_of_match,
 	},
 	.probe = simple_probe,
-	.remove = simple_util_remove,
+	.remove_new = simple_util_remove,
 };
 
 module_platform_driver(simple_card);

sound/soc/tegra/tegra_audio_graph_card.c

@@ -248,7 +248,7 @@ static struct platform_driver tegra_audio_graph_card = {
 		.of_match_table = graph_of_tegra_match,
 	},
 	.probe = tegra_audio_graph_probe,
-	.remove = simple_util_remove,
+	.remove_new = simple_util_remove,
 };
 module_platform_driver(tegra_audio_graph_card);