This is a note to let you know that I've just added the patch titled platform/x86: acer-wmi: Add ACER_CAP_SET_FUNCTION_MODE capability flag to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: platform-x86-acer-wmi-add-acer_cap_set_function_mode.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit c08e4000efdf7c1b497a403439bc43ec7aa0bfec Author: Hans de Goede <hdegoede@xxxxxxxxxx> Date: Mon Oct 19 20:56:27 2020 +0200 platform/x86: acer-wmi: Add ACER_CAP_SET_FUNCTION_MODE capability flag [ Upstream commit 82cb8a5c395ea5be20e0fe31a8fe84380a502ca5 ] Not all devices supporting WMID_GUID3 support the wmid3_set_function_mode() call, leading to errors like these: [ 60.138358] acer_wmi: Enabling RF Button failed: 0x1 - 0xff [ 60.140036] acer_wmi: Enabling Launch Manager failed: 0x1 - 0xff Add an ACER_CAP_SET_FUNCTION_MODE capability flag, so that these calls can be disabled through the new force_caps mechanism. Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Link: https://lore.kernel.org/r/20201019185628.264473-5-hdegoede@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 2e77ac458bab..657fd8c49597 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -224,6 +224,7 @@ struct hotkey_function_type_aa { #define ACER_CAP_BLUETOOTH BIT(2) #define ACER_CAP_BRIGHTNESS BIT(3) #define ACER_CAP_THREEG BIT(4) +#define ACER_CAP_SET_FUNCTION_MODE BIT(5) /* * Interface type flags @@ -2261,10 +2262,14 @@ static int __init acer_wmi_init(void) if (acpi_video_get_backlight_type() != acpi_backlight_vendor) interface->capability &= ~ACER_CAP_BRIGHTNESS; + if (wmi_has_guid(WMID_GUID3)) + interface->capability |= ACER_CAP_SET_FUNCTION_MODE; + if (force_caps != -1) interface->capability = force_caps; - if (wmi_has_guid(WMID_GUID3)) { + if (wmi_has_guid(WMID_GUID3) && + (interface->capability & ACER_CAP_SET_FUNCTION_MODE)) { if (ACPI_FAILURE(acer_wmi_enable_rf_button())) pr_warn("Cannot enable RF Button Driver\n");