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Add lock protections and avoid unnecessary actions if the PG state is already the same as required. Signed-off-by: Evan Quan <evan.quan@amd.com> Tested-by: Matt Coffin <mcoffin13@gmail.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>