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José Expósito 2ef7caab18 Input: clear BTN_RIGHT/MIDDLE on buttonpads 
[ Upstream commit 37ef4c19b4 ]

Buttonpads are expected to map the INPUT_PROP_BUTTONPAD property bit
and the BTN_LEFT key bit.

As explained in the specification, where a device has a button type
value of 0 (click-pad) or 1 (pressure-pad) there should not be
discrete buttons:
https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/touchpad-windows-precision-touchpad-collection#device-capabilities-feature-report

However, some drivers map the BTN_RIGHT and/or BTN_MIDDLE key bits even
though the device is a buttonpad and therefore does not have those
buttons.

This behavior has forced userspace applications like libinput to
implement different workarounds and quirks to detect buttonpads and
offer to the user the right set of features and configuration options.
For more information:
https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/726

In order to avoid this issue clear the BTN_RIGHT and BTN_MIDDLE key
bits when the input device is register if the INPUT_PROP_BUTTONPAD
property bit is set.

Notice that this change will not affect udev because it does not check
for buttons. See systemd/src/udev/udev-builtin-input_id.c.

List of known affected hardware:

 - Chuwi AeroBook Plus
 - Chuwi Gemibook
 - Framework Laptop
 - GPD Win Max
 - Huawei MateBook 2020
 - Prestigio Smartbook 141 C2
 - Purism Librem 14v1
 - StarLite Mk II   - AMI firmware
 - StarLite Mk II   - Coreboot firmware
 - StarLite Mk III  - AMI firmware
 - StarLite Mk III  - Coreboot firmware
 - StarLabTop Mk IV - AMI firmware
 - StarLabTop Mk IV - Coreboot firmware
 - StarBook Mk V

Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://lore.kernel.org/r/20220208174806.17183-1-jose.exposito89@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-03-08 19:01:55 +01:00
arch parisc/unaligned: Fix ldw() and stw() unalignment handlers 2022-03-02 11:33:53 +01:00
block block: bio-integrity: Advance seed correctly for larger interval sizes 2022-02-08 18:16:28 +01:00
certs certs: Trigger creation of RSA module signing key if it's not an RSA key 2021-09-22 11:45:19 +02:00
crypto crypto: pcrypt - Delay write to padata->info 2021-11-26 11:40:32 +01:00
Documentation bpf: Add kconfig knob for disabling unpriv bpf by default 2022-02-16 12:44:50 +01:00
drivers Input: clear BTN_RIGHT/MIDDLE on buttonpads 2022-03-08 19:01:55 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:20:30 +01:00
fs fget: clarify and improve __fget_files() implementation 2022-03-02 11:34:00 +01:00
include openvswitch: Fix setting ipv6 fields causing hw csum failure 2022-03-02 11:33:55 +01:00
init bpf: Add kconfig knob for disabling unpriv bpf by default 2022-02-16 12:44:50 +01:00
ipc ipc: WARN if trying to remove ipc object which is absent 2021-12-08 08:46:53 +01:00
kernel cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug 2022-03-02 11:33:52 +01:00
lib lib/iov_iter: initialize "flags" in new pipe_buffer 2022-02-23 11:57:35 +01:00
mm memblock: use kfree() to release kmalloced memblock regions 2022-03-02 11:34:00 +01:00
net openvswitch: Fix setting ipv6 fields causing hw csum failure 2022-03-02 11:33:55 +01:00
samples samples/kretprobes: Fix return value if register_kretprobe() failed 2021-11-26 11:40:31 +01:00
scripts Makefile.extrawarn: Move -Wunaligned-access to W=1 2022-02-23 11:57:32 +01:00
security ima: Allow template selection with ima_template[_fmt]= after ima_hash= 2022-02-16 12:44:49 +01:00
sound ASoC: ops: Fix stereo change notifications in snd_soc_put_volsw_range() 2022-02-23 11:57:35 +01:00
tools libsubcmd: Fix use-after-free for realloc(..., 0) 2022-02-23 11:57:34 +01:00
usr initramfs: restore default compression behavior 2020-04-13 10:34:19 +02:00
virt KVM: Use kvm_pfn_t for local PFN variable in hva_to_pfn_remapped() 2021-08-08 08:53:29 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS MAINTAINERS: Update drm/i915 bug filing URL 2020-02-28 16:36:12 +01:00
Makefile Linux 4.14.269 2022-03-02 11:34:01 +01:00
README

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.