linux-kernel - [PATCH 4.19 125/125] ALSA: usb-audio: Update documentation comment for MS2109 quirk

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Message-Id: <20200901150940.730505107@linuxfoundation.org>
Date:   Tue,  1 Sep 2020 17:11:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hector Martin <marcan@...can.st>,
        Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 4.19 125/125] ALSA: usb-audio: Update documentation comment for MS2109 quirk

From: Hector Martin <marcan@...can.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@...can.st>
Link: https://lore.kernel.org/r/20200816084431.102151-1-marcan@marcan.st
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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
@@ -3524,8 +3524,8 @@ ALC1220_VB_DESKTOP(0x26ce, 0x0a01), /* A
  * 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 |