tree 6919af56842f47f2a2b553b890320a9952c501b6
parent 9980c6209ebc2a02eb3ca51a4fae1e17f645c868
author Takashi Iwai <tiwai@suse.de> 1261999462 +0100
committer Takashi Iwai <tiwai@suse.de> 1261999462 +0100

ALSA: usb-audio - Avoid Oops after disconnect

As the release of substreams may be done asynchronously from the
disconnection, close callback needs to check the shutdown flag before
actually accessing the usb interface.

Reference: Novell bnc#505027
	http://bugzilla.novell.com/show_bug.cgi?id=565027

Signed-off-by: Takashi Iwai <tiwai@suse.de>