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>

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index e9466ae..9dabd63 100644 (file)
--- 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;