This is a note to let you know that I've just added the patch titled

ALSA: usb-audio: add implicit fb quirk for Behringer UFX1204

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: alsa-usb-audio-add-implicit-fb-quirk-for-behringer-ufx1204.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 5e35dc0338d85ccebacf3f77eca1e5dea73155e8 Mon Sep 17 00:00:00 2001

From: Lassi Ylikojola lassi.ylikojola@gmail.com Date: Fri, 9 Feb 2018 16:51:36 +0200 Subject: ALSA: usb-audio: add implicit fb quirk for Behringer UFX1204

From: Lassi Ylikojola lassi.ylikojola@gmail.com

commit 5e35dc0338d85ccebacf3f77eca1e5dea73155e8 upstream.

Add quirk to ensure a sync endpoint is properly configured. This patch is a fix for same symptoms on Behringer UFX1204 as patch from Albertto Aquirre on Dec 8 2016 for Axe-Fx II.

Signed-off-by: Lassi Ylikojola lassi.ylikojola@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/usb/pcm.c | 9 +++++++++ 1 file changed, 9 insertions(+)

--- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -348,6 +348,15 @@ static int set_sync_ep_implicit_fb_quirk

alts = &iface->altsetting[1]; goto add_sync_ep; + case USB_ID(0x1397, 0x0002): + ep = 0x81; + iface = usb_ifnum_to_if(dev, 1); + + if (!iface || iface->num_altsetting == 0) + return -EINVAL; + + alts = &iface->altsetting[1]; + goto add_sync_ep; } if (attr == USB_ENDPOINT_SYNC_ASYNC && altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&

Patches currently in stable-queue which might be from lassi.ylikojola@gmail.com are

queue-4.4/alsa-usb-audio-add-implicit-fb-quirk-for-behringer-ufx1204.patch