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author	Takashi Iwai <tiwai@suse.de>
	Tue, 16 Oct 2012 11:05:59 +0000 (13:05 +0200)
committer	Takashi Iwai <tiwai@suse.de>
	Tue, 30 Oct 2012 10:07:10 +0000 (11:07 +0100)
commit	a0830dbd4e42b38aefdf3fb61ba5019a1a99ea85
tree	4dc74b708a07b56d12ed72a34d0a2e0cb8c8b9d4	tree \| snapshot
parent	888ea7d5ac6815ba16b3b3a20f665a92c7af6724	commit \| diff

ALSA: Add a reference counter to card instance

For more strict protection for wild disconnections, a refcount is
introduced to the card instance, and let it up/down when an object is
referred via snd_lookup_*() in the open ops.

The free-after-last-close check is also changed to check this refcount
instead of the empty list, too.

Reported-by: Matthieu CASTET <matthieu.castet@parrot.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

John Crispins staging tree

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include/sound/core.h		diff \| blob \| history
sound/core/compress_offload.c		diff \| blob \| history
sound/core/control.c		diff \| blob \| history
sound/core/hwdep.c		diff \| blob \| history
sound/core/init.c		diff \| blob \| history
sound/core/oss/mixer_oss.c		diff \| blob \| history
sound/core/oss/pcm_oss.c		diff \| blob \| history
sound/core/pcm_native.c		diff \| blob \| history
sound/core/rawmidi.c		diff \| blob \| history
sound/core/sound.c		diff \| blob \| history
sound/core/sound_oss.c		diff \| blob \| history