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Linus Torvalds 919464deec Revert "HID: bpf: allow write access to quirks field in struct hid_device" 
This reverts commit 6fd47effe9, and the related self-test update
commit e14e0eaeb0 ("selftests/hid: add test for assigning a given
device to hid-generic").

It results in things like the scroll wheel on Logitech mice not working
after a reboot due to the kernel being confused about the state of the
high-resolution mode.

Quoting Benjamin Tissoires:
 "The idea of 6fd47effe9 was to be able to call hid_bpf_rdesc_fixup()
  once per reprobe of the device.

  However, because the bpf filter can now change the quirk value, the
  call had to be moved before the driver gets bound (which was
  previously ensuring the unicity of the call).

  The net effect is that now, in the case hid-generic gets loaded first
  and then the specific driver gets loaded once the disk is available,
  the value of ->quirks is not reset, but kept to the value that was set
  by hid-generic (HID_QUIRK_INPUT_PER_APP).

  Once hid-logitech-hidpp kicks in, that quirk is now set, which creates
  two inputs for the single mouse: one keyboard for fancy shortcuts, and
  one mouse node.

  However, hid-logitech-hidpp expects only one input node to be attached
  (it stores it into hidpp->input), and when a wheel event is received,
  because there is some processing with high-resolution wheel events,
  the wheel event is injected into hidpp->input.

  And of course, when HID_QUIRK_INPUT_PER_APP is set, hidpp->input gets
  the keyboard node, which doesn't have wheel event type, and the events
  are ignored"

Reported-and-bisected-by: Mike Galbraith <efault@gmx.de>
Link: https://lore.kernel.org/all/CAHk-=wiUkQM3uheit2cNM0Y0OOY5qqspJgC8LkmOkJ2p2LDxcw@mail.gmail.com/
Acked-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2024-11-25 09:21:47 -08:00
arch The biggest change here is eliminating the awful idea that KVM had, of 2024-11-23 16:00:50 -08:00
block for-6.13/block-20241118 2024-11-18 16:50:08 -08:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto Random number generator updates for Linux 6.13-rc1. 2024-11-19 10:43:44 -08:00
Documentation The biggest change here is eliminating the awful idea that KVM had, of 2024-11-23 16:00:50 -08:00
drivers Revert "HID: bpf: allow write access to quirks field in struct hid_device" 2024-11-25 09:21:47 -08:00
fs - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
include The biggest change here is eliminating the awful idea that KVM had, of 2024-11-23 16:00:50 -08:00
init tracing updates for v6.13: 2024-11-22 13:27:01 -08:00
io_uring A rather large update for timekeeping and timers: 2024-11-19 16:35:06 -08:00
ipc fdget(), more trivial conversions 2024-11-03 01:28:06 -05:00
kernel The biggest change here is eliminating the awful idea that KVM had, of 2024-11-23 16:00:50 -08:00
lib - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
net Networking changes for 6.13. 2024-11-21 08:28:08 -08:00
rust Networking changes for 6.13. 2024-11-21 08:28:08 -08:00
samples powerpc updates for 6.13 2024-11-23 10:44:31 -08:00
scripts powerpc updates for 6.13 2024-11-23 10:44:31 -08:00
security \n 2024-11-21 09:55:45 -08:00
sound - Several drivers, including atmel-flexcom/rk8xx-core, palmas, and 2024-11-22 16:19:47 -08:00
tools Revert "HID: bpf: allow write access to quirks field in struct hid_device" 2024-11-25 09:21:47 -08:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt The biggest change here is eliminating the awful idea that KVM had, of 2024-11-23 16:00:50 -08:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
.mailmap media updates for v6.13-rc1 2024-11-20 14:01:15 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS cgroup: Changes for v6.13 2024-11-20 09:54:49 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS powerpc updates for 6.13 2024-11-23 10:44:31 -08:00
Makefile Linux 6.12 2024-11-17 14:15:08 -08:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

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.