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. Resending. Seems that there is a difference between git diff/commit versions 2.7.4 and 2.14.3. I had to insert a line break with 2.4.13 to align properly(hopefully).
Signed-off-by: Lassi Ylikojola lassi.ylikojola@gmail.com --- sound/usb/pcm.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index b9c9a19f9588..116a6ccc5b31 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -357,6 +357,16 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
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 &&