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-rw-r--r--include/linux/pci-acpi.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 3ba25065fa96..8837928fbf33 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -57,6 +57,15 @@ static inline acpi_status pcie_osc_support_set(u32 flags)
{
return __pci_osc_support_set(flags, PCI_EXPRESS_ROOT_HID_STRING);
}
+static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
+{
+ /* Find root host bridge */
+ while (pdev->bus->self)
+ pdev = pdev->bus->self;
+
+ return acpi_get_pci_rootbridge_handle(pci_domain_nr(pdev->bus),
+ pdev->bus->number);
+}
#else
#if !defined(AE_ERROR)
typedef u32 acpi_status;
@@ -66,6 +75,8 @@ static inline acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{return AE_ERROR;}
static inline acpi_status pci_osc_support_set(u32 flags) {return AE_ERROR;}
static inline acpi_status pcie_osc_support_set(u32 flags) {return AE_ERROR;}
+static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
+{ return NULL; }
#endif
#endif /* _PCI_ACPI_H_ */

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