From 5c9b8fae88bc2f629926b7949dbc3672d4fbdad2 Mon Sep 17 00:00:00 2001
From: ValdikSS <iam@valdikss.org.ru>
Date: Sun, 13 Feb 2022 22:49:24 +0100
Subject: HID: lenovo: Add note about different report numbers

Signed-off-by: Florian Klink <flokli@flokli.de>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-lenovo.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers/hid/hid-lenovo.c')

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index e9466ae8a9cb..9dabd6323234 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -487,6 +487,11 @@ static int lenovo_send_cmd_cptkbd(struct hid_device *hdev,
 	if (!buf)
 		return -ENOMEM;
 
+	/*
+	 * Feature report 0x13 is used for USB,
+	 * output report 0x18 is used for Bluetooth.
+	 * buf[0] is ignored by hid_hw_raw_request.
+	 */
 	buf[0] = 0x18;
 	buf[1] = byte2;
 	buf[2] = byte3;
-- 
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