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| author | Alex Hung <alex.hung@canonical.com> | 2018-02-22 21:43:44 -0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-02-27 17:15:39 +0100 |
| commit | 92d1b381f677cbd2d4370dc3b8d0679b7f0ace32 (patch) | |
| tree | 57e4a0e1660ab639136d4ed3778808dfee08b891 | |
| parent | 4a3928c6f8a53fa1aed28ccba227742486e8ddcb (diff) | |
| download | linux-92d1b381f677cbd2d4370dc3b8d0679b7f0ace32.tar.bz2 | |
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>
| -rw-r--r-- | drivers/acpi/pci_link.c | 4 |
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, |