linux-kernel - [056/129] ALSA: usb - Release capture substream URBs properly

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Message-Id: <20100918191302.166507869@clark.site>
Date:	Sat, 18 Sep 2010 12:12:34 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Takashi Iwai <tiwai@...e.de>
Subject: [056/129] ALSA: usb - Release capture substream URBs properly

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Takashi Iwai <tiwai@...e.de>

commit 76195fb096ca6db2f8bbaffb96e3025aaf1649a0 upstream.

Due to the wrong "return" in the loop, a capture substream won't be
released at disconnection properly if the device is capture only and has
no playback substream.  This caused Oops occasionally at the device
reconnection.

Reported-by: Kim Minhyoung <minhyoung.kim@....com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 sound/usb/card.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -126,7 +126,7 @@ static void snd_usb_stream_disconnect(st
 	for (idx = 0; idx < 2; idx++) {
 		subs = &as->substream[idx];
 		if (!subs->num_formats)
-			return;
+			continue;
 		snd_usb_release_substream_urbs(subs, 1);
 		subs->interface = -1;
 	}


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