From: Pierre Gondois <Pierre.Gondois@xxxxxxx> In ACPI 6.4, s6.2.13 "_PRT (PCI Routing Table)", PCI legacy interrupts can be described though a link device (first model). >From s6.2.16 "_SRS (Set Resource Settings)": "This optional control method [...]" Make it optional to have a _SRS method for link devices. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215560 Signed-off-by: Pierre Gondois <pierre.gondois@xxxxxxx> --- drivers/acpi/pci_link.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c index 58647051c948..129e3e7e80ee 100644 --- a/drivers/acpi/pci_link.c +++ b/drivers/acpi/pci_link.c @@ -288,6 +288,13 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq) if (!irq) return -EINVAL; + if (!acpi_has_method(handle, METHOD_NAME__SRS)) { + if (link->irq.active == irq) + return 0; + acpi_handle_err(handle, "Unable to set IRQ %d: No _SRS.\n", irq); + return -ENODEV; + } + resource = kzalloc(sizeof(*resource) + 1, irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL); if (!resource) return -ENOMEM; -- 2.25.1
