ACPI, PCI: Penalize legacy IRQ used by ACPI SCI

[mirror_ubuntu-artful-kernel.git] / drivers / acpi / pci_link.c

diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index cfd7581cc19fa24c37d1a3fb7cb370e33a63c760..b09ad554430acaf0052c3f960cb212b96582e804 100644 (file)
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -825,6 +825,22 @@ void acpi_penalize_isa_irq(int irq, int active)
        }
 }
 
+/*
+ * Penalize IRQ used by ACPI SCI. If ACPI SCI pin attributes conflict with
+ * PCI IRQ attributes, mark ACPI SCI as ISA_ALWAYS so it won't be use for
+ * PCI IRQs.
+ */
+void acpi_penalize_sci_irq(int irq, int trigger, int polarity)
+{
+       if (irq >= 0 && irq < ARRAY_SIZE(acpi_irq_penalty)) {
+               if (trigger != ACPI_MADT_TRIGGER_LEVEL ||
+                   polarity != ACPI_MADT_POLARITY_ACTIVE_LOW)
+                       acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_ALWAYS;
+               else
+                       acpi_irq_penalty[irq] += PIRQ_PENALTY_PCI_USING;
+       }
+}
+
 /*
  * Over-ride default table to reserve additional IRQs for use by ISA
  * e.g. acpi_irq_isa=5