Hi Takashi-san, Mark

Current ALSA (SoC) might be kernel panic if user unbinds sound driver during playback.

> aplay xxx.wav & > echo xxxx > /sys/bus/platform/drivers/xxxx/unbind

Main issue is we *can't* skip unbind with return -Exxx, because unbind operation doesn't checks return value from each driver. Thus, we *must* stop driver immediately when unbind.

1) is for ALSA 2) is for ALSA SoC 3) is for Renesas sound driver.

I think almost all driver want to have 3) type patch on .remove but this patch-set doesn't care at this point. Please let me know if they should have it.

Takashi Iwai (1): 1) ALSA: add snd_card_disconnect_sync()

Kuninori Morimoto (2): 2) ASoC: add snd_soc_card_disconnect_sync() 3) ASoC: rsnd: call snd_soc_card_disconnect_sync() when remove

include/sound/core.h | 2 ++ include/sound/soc.h | 2 ++ sound/core/init.c | 18 ++++++++++++++++++ sound/core/pcm.c | 4 ++++ sound/soc/sh/rcar/core.c | 2 ++ sound/soc/soc-core.c | 10 ++++++++++ 6 files changed, 38 insertions(+)