commit c461482c8072bb073e6146db320d3da85cdc89ad
author Takashi Iwai <tiwai@suse.de> Fri Jun 23 14:38:23 2006 +0200
committer Jaroslav Kysela <perex@suse.cz> Sat Sep 23 10:36:58 2006 +0200
tree 3b69cfd292a488a8cb57ac9b040bd2b1b1a1e26d
parent 746d4a02e68499fc6c1f8d0c43d2271853ade181

[ALSA] Unregister device files at disconnection

Orignally proposed by Sam Revitch <sam.revitch@gmail.com>.
Unregister device files at disconnection to avoid the futher accesses.
Also, the dev_unregister callback is removed and replaced with the
combination of disconnect + free.
A new function snd_card_free_when_closed() is introduced, which is
used in USB disconnect callback.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>