From ef90f00fb08ab96a273cb6c078bf1c6e75856375 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 28 Dec 2009 12:24:22 +0100 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- sound/usb/usbaudio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index b70527a92b0..8da53c56c4d 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -1934,7 +1934,7 @@ 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; }