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authorTakashi Iwai <tiwai@suse.de>2009-12-28 12:24:22 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-02-23 07:37:56 -0800
commitd13e7a58664e0e35db5e524176cb70143c7c07c2 (patch)
treed61ce67d2e298e202d968cbc11edde7d5254331d /sound/usb
parent98baa75bcbacb200b7e4e0ee01b508f4d459d8ce (diff)
ALSA: usb-audio - Avoid Oops after disconnect
commit 78b8d5d2ee280c463908fd75f3bdf246bcb6ac8d upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/usbaudio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 8803d9d93f84..f26a1254b0bb 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1936,7 +1936,7 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
struct snd_usb_substream *subs = &as->substream[direction];
- if (subs->interface >= 0) {
+ if (!as->chip->shutdown && subs->interface >= 0) {
usb_set_interface(subs->dev, subs->interface, 0);
subs->interface = -1;
}