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acpi_agdi_init() in acpi_arm_init() will register a SDEI event, so it needs the SDEI subsystem to be initialized (which is done in acpi_ghes_init()) before the AGDI driver probing. In commitfcea0ccf4f("ACPI: bus: Consolidate all arm specific initialisation into acpi_arm_init()"), the acpi_agdi_init() was called before acpi_ghes_init() and it causes following failure: | [ 0.515864] sdei: Failed to create event 1073741825: -5 | [ 0.515866] agdi agdi.0: Failed to register for SDEI event 1073741825 | [ 0.515867] agdi: probe of agdi.0 failed with error -5 | ... | [ 0.516022] sdei: SDEIv1.0 (0x0) detected in firmware. Fix it by moving acpi_arm_init() to the place of after acpi_ghes_init(). Fixes:fcea0ccf4f("ACPI: bus: Consolidate all arm specific initialisation into acpi_arm_init()") Reported-by: D Scott Phillips <scott@os.amperecomputing.com> Signed-off-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: D Scott Phillips <scott@os.amperecomputing.com> Cc: 6.5+ <stable@vger.kernel.org> # 6.5+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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.
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.