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Candle Sun 1cb0d2aee2 HID: core: check whether Usage Page item is after Usage ID items Upstream commit `58e7515500` ("HID: core: move Usage Page concatenation to Main item") adds support for Usage Page item after Usage ID items (such as keyboards manufactured by Primax). Usage Page concatenation in Main item works well for following report descriptor patterns: USAGE_PAGE (Keyboard) 05 07 USAGE_MINIMUM (Keyboard LeftControl) 19 E0 USAGE_MAXIMUM (Keyboard Right GUI) 29 E7 LOGICAL_MINIMUM (0) 15 00 LOGICAL_MAXIMUM (1) 25 01 REPORT_SIZE (1) 75 01 REPORT_COUNT (8) 95 08 INPUT (Data,Var,Abs) 81 02 ------------- USAGE_MINIMUM (Keyboard LeftControl) 19 E0 USAGE_MAXIMUM (Keyboard Right GUI) 29 E7 LOGICAL_MINIMUM (0) 15 00 LOGICAL_MAXIMUM (1) 25 01 REPORT_SIZE (1) 75 01 REPORT_COUNT (8) 95 08 USAGE_PAGE (Keyboard) 05 07 INPUT (Data,Var,Abs) 81 02 But it makes the parser act wrong for the following report descriptor pattern(such as some Gamepads): USAGE_PAGE (Button) 05 09 USAGE (Button 1) 09 01 USAGE (Button 2) 09 02 USAGE (Button 4) 09 04 USAGE (Button 5) 09 05 USAGE (Button 7) 09 07 USAGE (Button 8) 09 08 USAGE (Button 14) 09 0E USAGE (Button 15) 09 0F USAGE (Button 13) 09 0D USAGE_PAGE (Consumer Devices) 05 0C USAGE (Back) 0a 24 02 USAGE (HomePage) 0a 23 02 LOGICAL_MINIMUM (0) 15 00 LOGICAL_MAXIMUM (1) 25 01 REPORT_SIZE (1) 75 01 REPORT_COUNT (11) 95 0B INPUT (Data,Var,Abs) 81 02 With Usage Page concatenation in Main item, parser recognizes all the 11 Usages as consumer keys, it is not the HID device's real intention. This patch checks whether Usage Page is really defined after Usage ID items by comparing usage page using status. Usage Page concatenation on currently defined Usage Page will always do in local parsing when Usage ID items encountered. When Main item is parsing, concatenation will do again with last defined Usage Page if this page has not been used in the previous usages concatenation. Signed-off-by: Candle Sun <candle.sun@unisoc.com> Signed-off-by: Nianfu Bai <nianfu.bai@unisoc.com> Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>		2019-11-12 16:21:44 +01:00
arch	powerpc fixes for 5.4 #4	2019-11-02 11:08:19 -07:00
block	iocost: don't nest spin_lock_irq in ioc_weight_write()	2019-10-31 11:40:57 -06:00
certs	PKCS#7: Refactor verify_pkcs7_signature()	2019-08-05 18:40:18 -04:00
crypto	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
Documentation	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-11-01 17:48:11 -07:00
drivers	HID: core: check whether Usage Page item is after Usage ID items	2019-11-12 16:21:44 +01:00
fs	ocfs2: protect extent tree in ocfs2_prepare_inode_for_write()	2019-11-06 08:47:08 -08:00
include	Merge branch 'akpm' (patches from Andrew)	2019-11-06 12:02:13 -08:00
init	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
ipc	ipc/sem.c: convert to use built-in RCU list checking	2019-09-25 17:51:41 -07:00
kernel	for-linus-2019-11-05	2019-11-05 09:44:02 -08:00
lib	dump_stack: avoid the livelock of the dump_lock	2019-11-06 08:47:50 -08:00
LICENSES	LICENSES: Rename other to deprecated	2019-05-03 06:34:32 -06:00
mm	mm: memcontrol: fix network errors from failing __GFP_ATOMIC charges	2019-11-06 08:47:50 -08:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-11-01 17:48:11 -07:00
samples	samples/bpf: Add a workaround for asm_inline	2019-10-03 17:37:11 +02:00
scripts	scripts/gdb: fix debugging modules compiled with hot/cold partitioning	2019-11-06 08:47:50 -08:00
security	efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN	2019-10-31 09:40:21 +01:00
sound	ALSA: timer: Fix mutex deadlock at releasing card	2019-10-30 22:54:56 +01:00
tools	Merge branch 'akpm' (patches from Andrew)	2019-11-06 12:02:13 -08:00
usr	kbuild: update compile-test header list for v5.4-rc2	2019-10-05 15:29:49 +09:00
virt	kvm: call kvm_arch_destroy_vm if vm creation fails	2019-10-31 12:13:16 +01:00
.clang-format	clang-format: Update with the latest for_each macro list	2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes
.gitignore	Modules updates for v5.4	2019-09-22 10:34:46 -07:00
.mailmap	A few MIPS fixes:	2019-10-26 19:43:12 -04:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer	2019-10-10 08:12:51 -07:00
Kbuild	kbuild: do not descend to ./Kbuild when cleaning	2019-08-21 21:03:58 +09:00
Kconfig	docs: kbuild: convert docs to ReST and rename to *.rst	2019-06-14 14:21:21 -06:00
MAINTAINERS	MAINTAINERS: update information for "MEMORY MANAGEMENT"	2019-11-06 08:47:50 -08:00
Makefile	Linux 5.4-rc6	2019-11-03 14:07:26 -08:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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 Restructured Text 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.