PCI ACPI: Added a function to register _OSC with only PCIe devices.
The function pci_osc_support_set() traverses every root bridge when
checking for _OSC support for a capability. It quits as soon as it finds a
device/bridge that doesn't support the requested capability. This won't
work for systems that have mixed PCI and PCIe bridges when checking for
PCIe features. I split this function into two -- pci_osc_support_set() and
pcie_osc_support_set(). The latter is used when only PCIe devices should be
traversed.
Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 936ef82..3ba2506 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -48,7 +48,15 @@
#ifdef CONFIG_ACPI
extern acpi_status pci_osc_control_set(acpi_handle handle, u32 flags);
-extern acpi_status pci_osc_support_set(u32 flags);
+extern acpi_status __pci_osc_support_set(u32 flags, const char *hid);
+static inline acpi_status pci_osc_support_set(u32 flags)
+{
+ return __pci_osc_support_set(flags, PCI_ROOT_HID_STRING);
+}
+static inline acpi_status pcie_osc_support_set(u32 flags)
+{
+ return __pci_osc_support_set(flags, PCI_EXPRESS_ROOT_HID_STRING);
+}
#else
#if !defined(AE_ERROR)
typedef u32 acpi_status;
@@ -57,6 +65,7 @@
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;}
#endif
#endif /* _PCI_ACPI_H_ */
