linux-kernel - [PATCH v4 3/3] HID: lenovo: Add note about different report numbers

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Message-Id: <20220213214924.32407-4-flokli@flokli.de>
Date:   Sun, 13 Feb 2022 22:49:24 +0100
From:   Florian Klink <flokli@...kli.de>
To:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        ValdikSS <iam@...dikss.org.ru>, Florian Klink <flokli@...kli.de>
Subject: [PATCH v4 3/3] HID: lenovo: Add note about different report numbers

From: ValdikSS <iam@...dikss.org.ru>

Signed-off-by: Florian Klink <flokli@...kli.de>
---
 drivers/hid/hid-lenovo.c | 5 +++++
 1 file changed, 5 insertions(+)

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;
-- 
2.35.1