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From: "Ali Ahmet Memiş" <aliamemis@disroot.org>
To: "Rafael J . Wysocki" <rafael@kernel.org>
Cc: "Hans de Goede" <johannes.goede@oss.qualcomm.com>,
	"Rong Zhang" <i@rong.moe>, "Len Brown" <lenb@kernel.org>,
	"Daniel Lezcano" <daniel.lezcano@kernel.org>,
	"Zhang Rui" <rui.zhang@intel.com>,
	"Lukasz Luba" <lukasz.luba@arm.com>,
	"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
	"Ike Panhc" <ikepanhc@gmail.com>,
	"Derek J . Clark" <derekjohn.clark@gmail.com>,
	"Mark Pearson" <mpearson-lenovo@squebb.ca>,
	"Armin Wolf" <W_Armin@gmx.de>,
	"Charis Stratakis" <c.stratakis@proton.me>,
	"Avraham Hollander" <anhollander516@gmail.com>,
	"Jeffrey Wälti" <jeffrey@waelti.dev>, Rick <rickk1166@gmail.com>,
	linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org,
	platform-driver-x86@vger.kernel.org,
	acpica-devel@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/4] ACPI: Serialize battery, INT3403 _TMP and ideapad methods
Date: Sat, 17 Oct 2026 16:06:33 +0300	[thread overview]
Message-ID: <20261017130652.318778-1-aliamemis@disroot.org> (raw)

On ThinkPad P1 Gen2 and P53, INT3403 _TMP switches the EC page selector
without taking the mutex the battery methods use.  On some Lenovo
IdeaPad and Yoga models, the battery _BIX and the ideapad GBMD take the
EC mutex and a serialized method in opposite order and deadlock until
an AML mutex times out.

As discussed in [1], add exclusive variants of the AML evaluation
helpers and use them for the battery, INT3403 _TMP and ideapad methods.
Patches 2-4 depend on patch 1.

Changes in v2:
- Merge the follow-up series [2] and drop its EC query and UCSI patches
  until they are shown to help
- Add acpi_execute_simple_method_exclusive() for _BTP and ideapad
- Make the helpers wrappers that take the lock around the existing ones
- Join lines up to 100 columns, add a Link: for Suggested-by:

Link: https://lore.kernel.org/all/CAJZ5v0gS4agVUkCO6M=VW4Wi2y1-s+k23bpzmX9aAZ0Rsv4z9Q@mail.gmail.com/ [1]
Link: https://lore.kernel.org/all/20261014190544.150093-1-aliamemis@disroot.org/ [2]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=221065
v1: https://lore.kernel.org/all/20261014132703.93355-1-aliamemis@disroot.org/

Ali Ahmet Memiş (4):
  ACPI: utils: Add exclusive AML evaluation helpers
  ACPI: battery: Evaluate battery methods exclusively
  thermal: intel: int340x: Evaluate _TMP exclusively
  platform/x86: ideapad-laptop: Evaluate ACPI methods exclusively

 drivers/acpi/battery.c                        | 12 +++---
 drivers/acpi/utils.c                          | 41 +++++++++++++++++++
 drivers/platform/x86/lenovo/ideapad-laptop.c  | 12 ++++--
 .../int340x_thermal/int340x_thermal_zone.c    |  6 ++-
 include/acpi/acpi_bus.h                       |  7 ++++
 5 files changed, 66 insertions(+), 12 deletions(-)


base-commit: 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907
-- 
2.55.0


             reply	other threads:[~2026-10-17 13:07 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-17 13:06 Ali Ahmet Memiş [this message]
2026-10-17 13:06 ` [PATCH v2 1/4] ACPI: utils: Add exclusive AML evaluation helpers Ali Ahmet Memiş
2026-10-17 13:06 ` [PATCH v2 2/4] ACPI: battery: Evaluate battery methods exclusively Ali Ahmet Memiş
2026-10-17 13:06 ` [PATCH v2 3/4] thermal: intel: int340x: Evaluate _TMP exclusively Ali Ahmet Memiş
2026-10-17 13:08 ` [PATCH v2 4/4] platform/x86: ideapad-laptop: Evaluate ACPI methods exclusively Ali Ahmet Memiş
2026-10-17 18:06 ` [PATCH v2 0/4] ACPI: Serialize battery, INT3403 _TMP and ideapad methods Rong Zhang
2026-10-17 18:24   ` Rong Zhang

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