ALSA: core: Make snd_card_free() return void

The function returns 0 unconditionally. Make it return void instead and
simplify all callers accordingly.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Geoff Levand <geoff@infradead.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20230207191907.467756-4-u.kleine-koenig@pengutronix.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: Uwe Kleine-König

include/sound/core.h

@@ -288,7 +288,7 @@ int snd_devm_card_new(struct device *parent, int idx, const char *xid,
 
 void snd_card_disconnect(struct snd_card *card);
 void snd_card_disconnect_sync(struct snd_card *card);
-int snd_card_free(struct snd_card *card);
+void snd_card_free(struct snd_card *card);
 void snd_card_free_when_closed(struct snd_card *card);
 int snd_card_free_on_error(struct device *dev, int ret);
 void snd_card_set_id(struct snd_card *card, const char *id);

sound/core/init.c

@@ -632,7 +632,7 @@ EXPORT_SYMBOL(snd_card_free_when_closed);
  * Return: Zero. Frees all associated devices and frees the control
  * interface associated to given soundcard.
  */
-int snd_card_free(struct snd_card *card)
+void snd_card_free(struct snd_card *card)
 {
 	DECLARE_COMPLETION_ONSTACK(released);
 
@@ -643,15 +643,13 @@ int snd_card_free(struct snd_card *card)
 	 * the check here at the beginning.
 	 */
 	if (card->releasing)
-		return 0;
+		return;
 
 	card->release_completion = &released;
 	snd_card_free_when_closed(card);
 
 	/* wait, until all devices are ready for the free operation */
 	wait_for_completion(&released);
-
-	return 0;
 }
 EXPORT_SYMBOL(snd_card_free);
 

sound/pci/hda/hda_tegra.c

@@ -582,12 +582,10 @@ static void hda_tegra_probe_work(struct work_struct *work)
 
 static int hda_tegra_remove(struct platform_device *pdev)
 {
-	int ret;
-
-	ret = snd_card_free(dev_get_drvdata(&pdev->dev));
+	snd_card_free(dev_get_drvdata(&pdev->dev));
 	pm_runtime_disable(&pdev->dev);
 
-	return ret;
+	return 0;
 }
 
 static void hda_tegra_shutdown(struct platform_device *pdev)

sound/ppc/snd_ps3.c

@@ -1053,9 +1053,7 @@ static void snd_ps3_driver_remove(struct ps3_system_bus_device *dev)
 	 * ctl and preallocate buffer will be freed in
 	 * snd_card_free
 	 */
-	ret = snd_card_free(the_card.card);
-	if (ret)
-		pr_info("%s: ctl freecard=%d\n", __func__, ret);
+	snd_card_free(the_card.card);
 
 	dma_free_coherent(&dev->core,
 			  PAGE_SIZE,