From d763145312582c08c4e9ed99d61276cde8488256 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 8 Apr 2021 09:56:56 +0200
Subject: ALSA: usb-audio: Skip probe of UA-101 devices

UA-101 device and co are supported by another driver, snd-ua101, but
the USB audio class driver (snd-usb-audio) catches all and this
resulted in the lack of functionality like missing MIDI devices.

This patch introduces a sort of deny-listing for those devices to just
return -ENODEV at probe in snd-usb-audio driver, so that it falls back
to the probe by snd-ua101.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=212477
Link: https://lore.kernel.org/r/20210408075656.30184-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/card.c         |  2 ++
 sound/usb/quirks-table.h | 21 +++++++++++++++++++++
 sound/usb/usbaudio.h     |  1 +
 3 files changed, 24 insertions(+)

(limited to 'sound')

diff --git a/sound/usb/card.c b/sound/usb/card.c
index 7b7526d3a56e..2f6a62416c05 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -713,6 +713,8 @@ static int usb_audio_probe(struct usb_interface *intf,
 		quirk = get_alias_quirk(dev, id);
 	if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
 		return -ENXIO;
+	if (quirk && quirk->ifnum == QUIRK_NODEV_INTERFACE)
+		return -ENODEV;
 
 	err = snd_usb_apply_boot_quirk(dev, intf, quirk, id);
 	if (err < 0)
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 9716a9f7c095..92f525b1c992 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -1674,6 +1674,27 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		}
 	}
 },
+
+/* UA101 and co are supported by another driver */
+{
+	USB_DEVICE(0x0582, 0x0044), /* UA-1000 high speed */
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.ifnum = QUIRK_NODEV_INTERFACE
+	},
+},
+{
+	USB_DEVICE(0x0582, 0x007d), /* UA-101 high speed */
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.ifnum = QUIRK_NODEV_INTERFACE
+	},
+},
+{
+	USB_DEVICE(0x0582, 0x008d), /* UA-101 full speed */
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.ifnum = QUIRK_NODEV_INTERFACE
+	},
+},
+
 /* this catches most recent vendor-specific Roland devices */
 {
 	.match_flags = USB_DEVICE_ID_MATCH_VENDOR |
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 8794c8658ab9..a536ee33d36e 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -77,6 +77,7 @@ struct snd_usb_audio {
  */
 
 /* special values for .ifnum */
+#define QUIRK_NODEV_INTERFACE		-3	/* return -ENODEV */
 #define QUIRK_NO_INTERFACE		-2
 #define QUIRK_ANY_INTERFACE		-1
 
-- 
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