[PATCH 4.14 147/167] ALSA: usb-audio: add implicit fb quirk for Behringer UFX1204

Greg Kroah-Hartman
2018-02-21T12:49:18Z

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
@@ -357,6 +357,15 @@ 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 &&