From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lassi Ylikojola Subject: [PATCH] ALSA: usb-audio: add implicit fb quirk for Behringer UFX1204 Date: Sat, 3 Feb 2018 16:42:40 +0200 Message-ID: <0132cbb2-34f8-b85c-383d-d639d938c836@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: perex@perex.cz, tiwai@suse.com, arvind.yadav.cs@gmail.com, lassi.ylikojola@gmail.com, bhumirks@gmail.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org List-Id: alsa-devel@alsa-project.org 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 --- sound/usb/pcm.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index b9c9a19f9588..2d8b9e19e99b 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -352,6 +352,15 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs, ep = 0x86; 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): /* Behringer UFX1204 */ + ep = 0x81; + iface = usb_ifnum_to_if(dev, 1); + if (!iface || iface->num_altsetting == 0) return -EINVAL; -- 2.14.3