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[ Upstream commit13e962140b] With commitdfa46c50f6("ACPI / button: Fix an issue in button.lid_init_state=ignore mode"), the lid device is considered to be not compliant to SW_LID if the Lid state is unchanged when updating it. This is not wrong, but we overlooked the resume case, where Lid state is updated unconditionally in the button driver .resume() callback. And this results in warning message "ACPI: button: The lid device is not compliant to SW_LID." after resume, if the machine is suspended with Lid opened and then resumed with Lid opened. Fix this by flushing the cached lid state before updating the Lid device in .resume() callback. Fixes:dfa46c50f6("ACPI / button: Fix an issue in button.lid_init_state=ignore mode") Reported-and-tested-by: Zhao Lijian <lijian.zhao@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.