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

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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>
This commit is contained in:
Lassi Ylikojola 2018-02-09 16:51:36 +02:00 committed by Takashi Iwai
parent 1f8ade92a8
commit 5e35dc0338
1 changed files with 9 additions and 0 deletions
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9
sound/usb/pcm.c
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@ -352,6 +352,15 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
ep = 0x86; ep = 0x86;
iface = usb_ifnum_to_if(dev, 2); iface = usb_ifnum_to_if(dev, 2);
if (!iface || iface->num_altsetting == 0)
return -EINVAL;
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) if (!iface || iface->num_altsetting == 0)
return -EINVAL; return -EINVAL;