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authorAlex Hung <alex.hung@canonical.com>2018-02-22 21:43:44 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-02-27 17:15:39 +0100
commit92d1b381f677cbd2d4370dc3b8d0679b7f0ace32 (patch)
tree57e4a0e1660ab639136d4ed3778808dfee08b891 /drivers/acpi/pci_link.c
parent4a3928c6f8a53fa1aed28ccba227742486e8ddcb (diff)
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 <alex.hung@canonical.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/pci_link.c')
-rw-r--r--drivers/acpi/pci_link.c4
1 files 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,