[alsa-devel] [PATCH 1/2] ASoC: core: call snd_soc_unregister_card() when component cleanup

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

ASoC devices are organized as [CPU]-[CARD]-[CODEC]. Then, [CPU]/[CODEC]
are based on [component] structure. Now, each [CARD] device knows that
it has organized from which [component]. But current [component] doesn't
inform to [CARD] that it was removed when user called rmmod or unbind it.
Thus, [CARD] which lost some [components] still exist in system.
And then, ALSA sound card will have some problem if user used this [CARD]
in such timing. This patch unregister [CARD] when [component] was removed.
If you want to use this [CARD] again, 
you need to re-insmod or re-bind removed [component] and [CARD] again. 

Reported-by: Nguyen Viet Dung <nv-dung at jinso.co.jp>
Reported-by: Bui Duc Phuc <bd-phuc at jinso.co.jp>
Reported-by: Cao Minh Hiep <cm-hiep at jinso.co.jp>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 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 ededb97..cd5db21 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2695,6 +2695,7 @@ static void snd_soc_component_add(struct snd_soc_component *component)
 static void snd_soc_component_cleanup(struct snd_soc_component *component)
 {
 	snd_soc_unregister_dais(component);
+	snd_soc_unregister_card(component->card);
 	kfree(component->name);
 }
 
-- 
1.7.9.5