Commit a8934c2c6dfd for kernel

commit a8934c2c6dfd72901cf3cc0de28e85eb902a61a4
Author: Takashi Iwai <tiwai@suse.de>
Date:   Fri Aug 7 10:34:16 2026 +0200

    ALSA: usb-audio: Fix sticky mixer regressions on M-Audio Fast Track Ultra

    The recent fix for sticky mixer volumes caused regressions of M-audio
    Fast Track Ultra device, where the mixer state is kept to the default
    value.

    Add the quirk entries to tolerate the broken mixer behavior.  As the
    device is known to work in the implicit feedback mode, explicitly
    enable the implicit feedback mode, too.

    Since there are two FTU models that are almost identical, both entries
    are added in this patch (0763:2080 and 0763:2081).

    Fixes: 86aa1ea1f15c ("ALSA: usb-audio: Do not expose sticky mixers")
    Link: https://bugzilla.suse.com/show_bug.cgi?id=1273166
    Link: https://patch.msgid.link/20260807083418.1712585-1-tiwai@suse.de
    Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index c90c89200baf..90ca39dbed18 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -2327,6 +2327,10 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
 		   QUIRK_FLAG_GENERIC_IMPLICIT_FB),
 	DEVICE_FLG(0x0763, 0x2031, /* M-Audio Fast Track C600 */
 		   QUIRK_FLAG_GENERIC_IMPLICIT_FB),
+	DEVICE_FLG(0x0763, 0x2080, /* M-Audio Fast Track Ultra */
+		   QUIRK_FLAG_MIXER_GET_CUR_BROKEN | QUIRK_FLAG_GENERIC_IMPLICIT_FB),
+	DEVICE_FLG(0x0763, 0x2081, /* M-Audio Fast Track Ultra */
+		   QUIRK_FLAG_MIXER_GET_CUR_BROKEN | QUIRK_FLAG_GENERIC_IMPLICIT_FB),
 	DEVICE_FLG(0x07fd, 0x000b, /* MOTU M Series 2nd hardware revision */
 		   QUIRK_FLAG_CTL_MSG_DELAY_1M),
 	DEVICE_FLG(0x08bb, 0x2702, /* LineX FM Transmitter */