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| author | Ali Ahmet Memiş <aliamemis@disroot.org> | 2026-10-18 15:23:48 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-10-22 19:05:28 +0200 |
| commit | f91c2cd6dbcedf52e227b2eea8d7b99ecbac7552 (patch) | |
| tree | 25477fbfa2e13282894efc62f6b204f7de668237 /tools/lib/python/__init__.py | |
| parent | c4aae727beb23a736c15b8d53e219da29d791065 (diff) | |
platform/x86: ideapad-laptop: Evaluate ACPI methods exclusively
On some Lenovo IdeaPad and Yoga models, the battery _BIX takes the EC
AML mutex and then calls the serialized RDER through RDIF, while GBMD
calls RDER first and then takes the EC mutex. When the two run
interleaved they deadlock until the mutex acquisition in RDER times
out, and GBMD returns garbage that is reported as both charge types
being enabled.
Evaluate all methods with the exclusive helpers, so that GBMD never runs
interleaved with the battery methods.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=221065
Link: https://lore.kernel.org/all/58586fa666f09c209f9d7fe8c692a8bdda6d4410.camel@rong.moe/
Signed-off-by: Ali Ahmet Memiş <aliamemis@disroot.org>
Reviewed-by: Rong Zhang <i@rong.moe>
Cc: All applicable <stable@vger.kernel.org> # 80892972ff23 ACPI: utils: Add exclusive AML evaluation helpers
Link: https://patch.msgid.link/20261018122348.679126-1-aliamemis@disroot.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/lib/python/__init__.py')
0 files changed, 0 insertions, 0 deletions