--- /dev/null
+From 74a2a7de81a2ef20732ec02087314e92692a7a1b Mon Sep 17 00:00:00 2001
+From: Hector Martin <marcan@marcan.st>
+Date: Sun, 16 Aug 2020 17:44:31 +0900
+Subject: ALSA: usb-audio: Update documentation comment for MS2109 quirk
+
+From: Hector Martin <marcan@marcan.st>
+
+commit 74a2a7de81a2ef20732ec02087314e92692a7a1b upstream.
+
+As the recent fix addressed the channel swap problem more properly,
+update the comment as well.
+
+Fixes: 1b7ecc241a67 ("ALSA: usb-audio: work around streaming quirk for MacroSilicon MS2109")
+Signed-off-by: Hector Martin <marcan@marcan.st>
+Link: https://lore.kernel.org/r/20200816084431.102151-1-marcan@marcan.st
+Signed-off-by: Takashi Iwai <tiwai@suse.de>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ sound/usb/quirks-table.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/sound/usb/quirks-table.h
++++ b/sound/usb/quirks-table.h
+@@ -3331,8 +3331,8 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge
+ * they pretend to be 96kHz mono as a workaround for stereo being broken
+ * by that...
+ *
+- * They also have swapped L-R channels, but that's for userspace to deal
+- * with.
++ * They also have an issue with initial stream alignment that causes the
++ * channels to be swapped and out of phase, which is dealt with in quirks.c.
+ */
+ {
+ .match_flags = USB_DEVICE_ID_MATCH_DEVICE |