linux-kernel - [41/90] ALSA: snd-usb: Accept UAC2 FORMAT

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Date:	Fri, 12 Aug 2011 14:04:26 -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,
	Daniel Mack <zonque@...il.com>,
	Clemens Ladisch <clemens@...isch.de>,
	Takashi Iwai <tiwai@...e.de>
Subject: [41/90] ALSA: snd-usb: Accept UAC2 FORMAT_TYPE descriptors with

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

------------------
 bLength > 6

From: Clemens Ladisch <clemens@...isch.de>

commit 824818b148db42173446707df4cbd61cd7133272 upstream.

The Focusrite Scarlett 18i6 USB has them that way, which is probably a
bug. Anyway, the driver should simply ignore this fact.

Signed-off-by: Daniel Mack <zonque@...il.com>
Reported-by: Nicolai Krakowiak <nicolai.krakowiak@...il.com>
Signed-off-by: Clemens Ladisch <clemens@...isch.de>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -352,7 +352,7 @@ int snd_usb_parse_audio_endpoints(struct
 			continue;
 		}
 		if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
-		    ((protocol == UAC_VERSION_2) && (fmt->bLength != 6))) {
+		    ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
 			snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
 				   dev->devnum, iface_no, altno);
 			continue;


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