This is a note to let you know that I've just added the patch titled HID: wacom: Do not completely map WACOM_HID_WD_TOUCHRINGSTATUS usage to the 4.13-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: hid-wacom-do-not-completely-map-wacom_hid_wd_touchringstatus-usage.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 8d411cbf46e515ca2b7ceb3d2b3f43e22813edac Mon Sep 17 00:00:00 2001 From: Jason Gerecke <killertofu@xxxxxxxxx> Date: Fri, 4 Aug 2017 15:35:14 -0700 Subject: HID: wacom: Do not completely map WACOM_HID_WD_TOUCHRINGSTATUS usage From: Jason Gerecke <killertofu@xxxxxxxxx> commit 8d411cbf46e515ca2b7ceb3d2b3f43e22813edac upstream. The WACOM_HID_WD_TOUCHRINGSTATUS usage is a single bit which tells us whether the touchring is currently in use or not. Because we need to reset the axis value to 0 when the finger is removed, we call 'wacom_map_usage' to ensure that the required type/code values are associated with the usage. The 'wacom_map_usage' also sets up the axis range and resolution, however, which is not desired in this particular case. Although xf86-input-wacom doesn't do really do anything with the ring's range or resolution, the libinput driver (for Wayland environments) uses these values to provide proper angle indications to userspace. Fixes: 60a2218698 ("HID: wacom: generic: add support for touchring") Signed-off-by: Jason Gerecke <jason.gerecke@xxxxxxxxx> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/hid/wacom_wac.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1846,7 +1846,13 @@ static void wacom_wac_pad_usage_mapping( features->device_type |= WACOM_DEVICETYPE_PAD; break; case WACOM_HID_WD_TOUCHRINGSTATUS: - wacom_map_usage(input, usage, field, EV_ABS, ABS_WHEEL, 0); + /* + * Only set up type/code association. Completely mapping + * this usage may overwrite the axis resolution and range. + */ + usage->type = EV_ABS; + usage->code = ABS_WHEEL; + set_bit(EV_ABS, input->evbit); features->device_type |= WACOM_DEVICETYPE_PAD; break; case WACOM_HID_WD_BUTTONCONFIG: Patches currently in stable-queue which might be from killertofu@xxxxxxxxx are queue-4.13/hid-wacom-do-not-completely-map-wacom_hid_wd_touchringstatus-usage.patch