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Mario Limonciello a0bde67526 drivers/platform/x86/amd: pmf: Check for invalid Smart PC Policies
[ Upstream commit 8e81b9cd6e ]

commit 376a8c2a14 ("platform/x86/amd/pmf: Update PMF Driver for
Compatibility with new PMF-TA") added support for platforms that support
an updated TA, however it also exposed a number of platforms that although
they have support for the updated TA don't actually populate a policy
binary.

Add an explicit check that the policy binary isn't empty before
initializing the TA.

Reported-by: Christian Heusel <christian@heusel.eu>
Closes: https://lore.kernel.org/platform-driver-x86/ae644428-5bf2-4b30-81ba-0b259ed3449b@heusel.eu/
Fixes: 376a8c2a14 ("platform/x86/amd/pmf: Update PMF Driver for Compatibility with new PMF-TA")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Christian Heusel <christian@heusel.eu>
Link: https://lore.kernel.org/r/20250423132002.3984997-3-superm1@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-05-22 14:29:35 +02:00
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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 reStructuredText 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.