ACPICA: Avoid evaluating methods too early during system resume
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 29 Sep 2021 16:31:25 +0000 (18:31 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 18 Nov 2021 18:16:14 +0000 (19:16 +0100)
commite8e98aa12411604360c4da14b83753cba581b5ca
treed5e3fd700e5c93c0c4df75b48ce194288bfe31ca
parent5fc13c5d43f517b5eb03feaae5e38efb863fba66
ACPICA: Avoid evaluating methods too early during system resume

[ Upstream commit d3c4b6f64ad356c0d9ddbcf73fa471e6a841cc5c ]

ACPICA commit 0762982923f95eb652cf7ded27356b247c9774de

During wakeup from system-wide sleep states, acpi_get_sleep_type_data()
is called and it tries to get memory from the slab allocator in order
to evaluate a control method, but if KFENCE is enabled in the kernel,
the memory allocation attempt causes an IRQ work to be queued and a
self-IPI to be sent to the CPU running the code which requires the
memory controller to be ready, so if that happens too early in the
wakeup path, it doesn't work.

Prevent that from taking place by calling acpi_get_sleep_type_data()
for S0 upfront, when preparing to enter a given sleep state, and
saving the data obtained by it for later use during system wakeup.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214271
Reported-by: Reik Keutterling <spielkind@gmail.com>
Tested-by: Reik Keutterling <spielkind@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/acpi/acpica/acglobal.h
drivers/acpi/acpica/hwesleep.c
drivers/acpi/acpica/hwsleep.c
drivers/acpi/acpica/hwxfsleep.c