[alsa-devel] [PATCH 2/9] ASoC: Shutdown DAPM contexts when removing a card

[Lars-Peter Clausen]

Currently when a ASoC sound card is unregistered we leave the individual
components in their current state, just call the remove() callback and leave
it to the drivers to do the proper shutdown/cleanup.

This patch introduces a call to snd_soc_dapm_shutdown() when removing the
card.  This will make sure that all DAPM widgets are properly powered down
and all DAPM contexts are put at the SND_SOC_BIAS_OFF level. This will
ensure that all components are properly powered down when the card is
removed.

Since a lot of drivers manually go to SND_SOC_BIAS_OFF in their remove
callback this will also allow us to remove a bit of duplicated code.

Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
---
 sound/soc/soc-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 031a19a..42f3690 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3812,6 +3812,7 @@ int snd_soc_unregister_card(struct snd_soc_card *card)
 {
 	if (card->instantiated) {
 		card->instantiated = false;
+		snd_soc_dapm_shutdown(card);
 		soc_cleanup_card_resources(card);
 	}
 	dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
-- 
1.8.0