platform/x86: hp-wmi: Ignore backlight and FnLock events

commit e8c5973 upstream.

On HP OmniBook 7 the keyboard backlight and FnLock keys are handled
directly by the firmware. However, they still trigger WMI events which
results in "Unknown key code" warnings in dmesg.

Add these key codes to the keymap with KE_IGNORE to silence the warnings
since no software action is needed.

Tested-by: Artem S. Tashkinov <aros@gmx.com>
Reported-by: Artem S. Tashkinov <aros@gmx.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221181
Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
Link: https://patch.msgid.link/20260403080155.169653-1-krishna.chomal108@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: VulnX

drivers/platform/x86/hp/hp-wmi.c

@@ -261,6 +261,11 @@ static const struct key_entry hp_wmi_keymap[] = {
 	{ KE_KEY, 0x21a9,  { KEY_TOUCHPAD_OFF } },
 	{ KE_KEY, 0x121a9, { KEY_TOUCHPAD_ON } },
 	{ KE_KEY, 0x231b,  { KEY_HELP } },
+	{ KE_IGNORE, 0x21ab, }, /* FnLock on */
+	{ KE_IGNORE, 0x121ab, }, /* FnLock off */
+	{ KE_IGNORE, 0x30021aa, }, /* kbd backlight: level 2 -> off */
+	{ KE_IGNORE, 0x33221aa, }, /* kbd backlight: off -> level 1 */
+	{ KE_IGNORE, 0x36421aa, }, /* kbd backlight: level 1 -> level 2*/
 	{ KE_END, 0 }
 };