From 92d1b381f677cbd2d4370dc3b8d0679b7f0ace32 Mon Sep 17 00:00:00 2001 From: Alex Hung Date: Thu, 22 Feb 2018 21:43:44 -0800 Subject: [PATCH] ACPI / PCI: pci_link: Allow the absence of _PRS and change log level In recent Intel hardware the IRQs become non-configurable after BIOS initializes them in PEI phase and _PRS objects are no longer included in ASL. This is the same as "static (non-configurable) devices do not specify a _PRS object" in ACPI spec. As a result, error messages saying "ACPI Exception: AE_NOT_FOUND, Evaluating _PRS" does not need to be in kernel messenges all the time but only when debug is enabled, and acpi_pci_link_get_possible should not return -ENODEV when _PRS is absent. Signed-off-by: Alex Hung Acked-by: Bjorn Helgaas Signed-off-by: Rafael J. Wysocki --- drivers/acpi/pci_link.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c index 85ad679390e3..d5eec352a6e1 100644 --- a/drivers/acpi/pci_link.c +++ b/drivers/acpi/pci_link.c @@ -173,8 +173,8 @@ static int acpi_pci_link_get_possible(struct acpi_pci_link *link) status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS, acpi_pci_link_check_possible, link); if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRS")); - return -ENODEV; + acpi_handle_debug(link->device->handle, "_PRS not present or invalid"); + return 0; } ACPI_DEBUG_PRINT((ACPI_DB_INFO,