From 0e85a22d01dfe9ad9a9d9e87cd4a88acce1aad65 Mon Sep 17 00:00:00 2001
From: Craig McLure <craig@mclure.net>
Date: Tue, 24 May 2022 08:21:15 +0200
Subject: [PATCH] ALSA: usb-audio: Configure sync endpoints before data
Git-commit: 0e85a22d01dfe9ad9a9d9e87cd4a88acce1aad65
Patch-mainline: v5.19-rc1
References: git-fixes

Devices such as the TC-Helicon GoXLR require the sync endpoint to be
configured in advance of the data endpoint in order for sound output
to work.

This patch simply changes the ordering of EP configuration to resolve
this.

Fixes: bf6313a0ff76 ("ALSA: usb-audio: Refactor endpoint management")
Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=215079
Signed-off-by: Craig McLure <craig@mclure.net>
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220524062115.25968-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/usb/pcm.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 6d699065e81a..b470404a5376 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -439,16 +439,21 @@ static int configure_endpoints(struct snd_usb_audio *chip,
 		/* stop any running stream beforehand */
 		if (stop_endpoints(subs, false))
 			sync_pending_stops(subs);
+		if (subs->sync_endpoint) {
+			err = snd_usb_endpoint_configure(chip, subs->sync_endpoint);
+			if (err < 0)
+				return err;
+		}
 		err = snd_usb_endpoint_configure(chip, subs->data_endpoint);
 		if (err < 0)
 			return err;
 		snd_usb_set_format_quirk(subs, subs->cur_audiofmt);
-	}
-
-	if (subs->sync_endpoint) {
-		err = snd_usb_endpoint_configure(chip, subs->sync_endpoint);
-		if (err < 0)
-			return err;
+	} else {
+		if (subs->sync_endpoint) {
+			err = snd_usb_endpoint_configure(chip, subs->sync_endpoint);
+			if (err < 0)
+				return err;
+		}
 	}
 
 	return 0;
-- 
2.35.3