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Hans de Goede ac3e038407 misc: lis3lv02d_i2c: Fix regulators getting en-/dis-abled twice on suspend/resume When not configured for wakeup lis3lv02d_i2c_suspend() will call lis3lv02d_poweroff() even if the device has already been turned off by the runtime-suspend handler and if configured for wakeup and the device is runtime-suspended at this point then it is not turned back on to serve as a wakeup source. Before commit `b1b9f7a494` ("misc: lis3lv02d_i2c: Add missing setting of the reg_ctrl callback"), lis3lv02d_poweroff() failed to disable the regulators which as a side effect made calling poweroff() twice ok. Now that poweroff() correctly disables the regulators, doing this twice triggers a WARN() in the regulator core: unbalanced disables for regulator-dummy WARNING: CPU: 1 PID: 92 at drivers/regulator/core.c:2999 _regulator_disable ... Fix lis3lv02d_i2c_suspend() to not call poweroff() a second time if already runtime-suspended and add a poweron() call when necessary to make wakeup work. lis3lv02d_i2c_resume() has similar issues, with an added weirness that it always powers on the device if it is runtime suspended, after which the first runtime-resume will call poweron() again, causing the enabled count for the regulator to increase by 1 every suspend/resume. These unbalanced regulator_enable() calls cause the regulator to never be turned off and trigger the following WARN() on driver unbind: WARNING: CPU: 1 PID: 1724 at drivers/regulator/core.c:2396 _regulator_put Fix this by making lis3lv02d_i2c_resume() mirror the new suspend(). Fixes: `b1b9f7a494` ("misc: lis3lv02d_i2c: Add missing setting of the reg_ctrl callback") Reported-by: Paul Menzel <pmenzel@molgen.mpg.de> Closes: https://lore.kernel.org/regressions/5fc6da74-af0a-4aac-b4d5-a000b39a63a5@molgen.mpg.de/ Cc: stable@vger.kernel.org Cc: regressions@lists.linux.dev Signed-off-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Paul Menzel <pmenzel@molgen.mpg.de> # Dell XPS 15 7590 Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de> Link: https://lore.kernel.org/r/20240220190035.53402-1-hdegoede@redhat.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2024-03-04 07:59:43 +01:00
arch	Kbuild fixes for v6.8 (2nd)	2024-02-18 10:09:25 -08:00
block	blk-iocost: Fix an UBSAN shift-out-of-bounds warning	2024-02-08 10:11:39 -07:00
certs	This update includes the following changes:	2023-11-02 16:15:30 -10:00
crypto	crypto: algif_hash - Remove bogus SGL free on zero-length error path	2024-02-02 18:08:12 +08:00
Documentation	Kbuild fixes for v6.8 (2nd)	2024-02-18 10:09:25 -08:00
drivers	misc: lis3lv02d_i2c: Fix regulators getting en-/dis-abled twice on suspend/resume	2024-03-04 07:59:43 +01:00
fs	bcachefs fixes for v6.8-rc5	2024-02-17 13:17:32 -08:00
include	Char/Misc changes for 6.8-rc5	2024-02-17 08:52:38 -08:00
init	update workarounds for gcc "asm goto" issue	2024-02-15 11:14:33 -08:00
io_uring	io_uring/net: fix multishot accept overflow handling	2024-02-14 18:30:19 -07:00
ipc	shm: Slim down dependencies	2023-12-20 19:26:31 -05:00
kernel	Probes fixes for v6.8-rc4:	2024-02-17 07:59:47 -08:00
lib	Driver core fixes for 6.8-rc5	2024-02-17 08:56:41 -08:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	mm/memory: Use exception ip to search exception tables	2024-02-12 23:04:42 +01:00
net	Including fixes from can, wireless and netfilter.	2024-02-15 11:39:27 -08:00
rust	Rust changes for v6.8	2024-01-11 13:05:41 -08:00
samples	work around gcc bugs with 'asm goto' with outputs	2024-02-09 15:57:48 -08:00
scripts	kallsyms: ignore ARMv4 thunks along with others	2024-02-15 22:44:56 +09:00
security	lsm/stable-6.8 PR 20240215	2024-02-16 07:58:43 -08:00
sound	ALSA: usb-audio: More relaxed check of MIDI jack names	2024-02-15 16:56:05 +01:00
tools	powerpc fixes for 6.8 #3	2024-02-17 16:59:31 -08:00
usr	Kbuild updates for v6.8	2024-01-18 17:57:07 -08:00
virt	Generic:	2024-01-17 13:03:37 -08:00
.clang-format	clang-format: Update with v6.7-rc4's `for_each` macro list	2023-12-08 23:54:38 +01:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.editorconfig	Add .editorconfig file for basic formatting	2023-12-28 16:22:47 +09:00
.get_maintainer.ignore	get_maintainer: add Alan to .get_maintainer.ignore	2022-08-20 15:17:44 -07:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	Add .editorconfig file for basic formatting	2023-12-28 16:22:47 +09:00
.mailmap	Including fixes from can, wireless and netfilter.	2024-02-15 11:39:27 -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	MAINTAINERS: supplement of zswap maintainers update	2024-01-25 23:52:21 -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	Driver core fixes for 6.8-rc5	2024-02-17 08:56:41 -08:00
Makefile	Linux 6.8-rc5	2024-02-18 12:56:25 -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.