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Biju Das 0a635239cd watchdog: rzg2l_wdt: Fix 'BUG: Invalid wait context' [ Upstream commit `e4cf89596c` ] This patch fixes the issue 'BUG: Invalid wait context' during restart() callback by using clk_prepare_enable() instead of pm_runtime_get_sync() for turning on the clocks during restart. This issue is noticed when testing with renesas_defconfig. [ 42.213802] reboot: Restarting system [ 42.217860] [ 42.219364] ============================= [ 42.223368] [ BUG: Invalid wait context ] [ 42.227372] 5.17.0-rc5-arm64-renesas-00002-g10393723e35e #522 Not tainted [ 42.234153] ----------------------------- [ 42.238155] systemd-shutdow/1 is trying to lock: [ 42.242766] ffff00000a650828 (&genpd->mlock){+.+.}-{3:3}, at: genpd_lock_mtx+0x14/0x20 [ 42.250709] other info that might help us debug this: [ 42.255753] context-{4:4} [ 42.258368] 2 locks held by systemd-shutdow/1: [ 42.262806] #0: ffff80000944e1c8 (system_transition_mutex#2){+.+.}-{3:3}, at: __do_sys_reboot+0xd0/0x250 [ 42.272388] #1: ffff8000094c4e40 (rcu_read_lock){....}-{1:2}, at: atomic_notifier_call_chain+0x0/0x150 [ 42.281795] stack backtrace: [ 42.284672] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.17.0-rc5-arm64-renesas-00002-g10393723e35e #522 [ 42.294577] Hardware name: Renesas SMARC EVK based on r9a07g044c2 (DT) [ 42.301096] Call trace: [ 42.303538] dump_backtrace+0xcc/0xd8 [ 42.307203] show_stack+0x14/0x30 [ 42.310517] dump_stack_lvl+0x88/0xb0 [ 42.314180] dump_stack+0x14/0x2c [ 42.317492] __lock_acquire+0x1b24/0x1b50 [ 42.321502] lock_acquire+0x120/0x3a8 [ 42.325162] __mutex_lock+0x84/0x8f8 [ 42.328737] mutex_lock_nested+0x30/0x58 [ 42.332658] genpd_lock_mtx+0x14/0x20 [ 42.336319] genpd_runtime_resume+0xc4/0x228 [ 42.340587] __rpm_callback+0x44/0x170 [ 42.344337] rpm_callback+0x64/0x70 [ 42.347824] rpm_resume+0x4e0/0x6b8 [ 42.351310] __pm_runtime_resume+0x50/0x78 [ 42.355404] rzg2l_wdt_restart+0x28/0x68 [ 42.359329] watchdog_restart_notifier+0x1c/0x30 [ 42.363943] atomic_notifier_call_chain+0x94/0x150 [ 42.368732] do_kernel_restart+0x24/0x30 [ 42.372652] machine_restart+0x44/0x70 [ 42.376399] kernel_restart+0x3c/0x60 [ 42.380058] __do_sys_reboot+0x228/0x250 [ 42.383977] __arm64_sys_reboot+0x20/0x28 [ 42.387983] invoke_syscall+0x40/0xf8 Fixes: `2cbc5cd0b5` ("watchdog: Add Watchdog Timer driver for RZ/G2L") Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20220225175320.11041-4-biju.das.jz@bp.renesas.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-14 18:44:49 +02:00
arch	ARM: pxa: maybe fix gpio lookup tables	2022-06-09 10:30:54 +02:00
block	block: fix bio_clone_blkg_association() to associate with proper blkcg_gq	2022-06-09 10:30:57 +02:00
certs	Kbuild updates for v5.18	2022-03-31 11:59:03 -07:00
crypto	crypto: cryptd - Protect per-CPU resource by disabling BH.	2022-06-09 10:30:30 +02:00
Documentation	media: lirc: add missing exceptions for lirc uapi header file	2022-06-09 10:30:55 +02:00
drivers	watchdog: rzg2l_wdt: Fix 'BUG: Invalid wait context'	2022-06-14 18:44:49 +02:00
fs	fs/ntfs3: Fix invalid free in log_replay	2022-06-09 10:30:56 +02:00
include	export: fix string handling of namespace in EXPORT_SYMBOL_NS	2022-06-14 18:44:49 +02:00
init	Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug	2022-06-09 10:30:49 +02:00
ipc	ipc/mqueue: use get_tree_nodev() in mqueue_get_tree()	2022-06-09 10:30:30 +02:00
kernel	kprobes: Fix build errors with CONFIG_KRETPROBES=n	2022-06-09 10:30:51 +02:00
lib	lib/string_helpers: fix not adding strarray to device's resource list	2022-06-09 10:30:49 +02:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	mm/memremap: fix missing call to untrack_pfn() in pagemap_range()	2022-06-09 10:30:52 +02:00
net	mac80211: upgrade passive scan to active scan on DFS channels after beacon rx	2022-06-09 10:30:50 +02:00
samples	samples/landlock: Format with clang-format	2022-06-09 10:30:46 +02:00
scripts	scripts/get_abi: Fix wrong script file name in the help message	2022-06-14 18:44:47 +02:00
security	ima: remove the IMA_TEMPLATE Kconfig option	2022-06-09 10:30:49 +02:00
sound	ASoC: rt5514: Fix event generation for "DSP Voice Wake Up" control	2022-06-09 10:30:52 +02:00
tools	perf evlist: Extend arch_evsel__must_be_in_group to support hybrid systems	2022-06-09 10:30:55 +02:00
usr	Kbuild updates for v5.18	2022-03-31 11:59:03 -07:00
virt	KVM: Free new dirty bitmap if creating a new memslot fails	2022-05-20 13:02:05 -04:00
.clang-format	genirq/msi: Make interrupt allocation less convoluted	2021-12-16 22:22:20 +01:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	hotfixes for 5.18-rc7	2022-05-13 10:22:37 -07:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: replace a Microchip AT91 maintainer	2022-02-09 11:30:01 +01:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	Merge branch 'arm/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc	2022-05-18 14:07:43 -10:00
Makefile	Linux 5.18.3	2022-06-09 10:30:57 +02:00
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.