]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
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>
Fri, 26 Nov 2021 10:36:05 +0000 (11:36 +0100)
commit69aee3a2b407081e6ae25dfffa29ab166792bf3a
tree6db7b8b63c931fd49178e9de9688536034c18b1d
parent605ed7145b5a397a31ca10ca9deea59954f9796c
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