ACPI: Introduce acpi_is_root_bridge()

Returns whether an ACPI CA node is a PCI root bridge or not.

This API is generically useful, and shouldn't just be a hotplug function.

The implementation becomes much simpler as well.

Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 3 insertions, 39 deletions

diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index fbc63d5e459f..eb159587d0bf 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -354,7 +354,7 @@ acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus,
                 status = acpi_run_hpp(handle, hpp);
                 if (ACPI_SUCCESS(status))
                         break;
-                if (acpi_root_bridge(handle))
+                if (acpi_is_root_bridge(handle))
                         break;
                 status = acpi_get_parent(handle, &phandle);
                 if (ACPI_FAILURE(status))
@@ -428,7 +428,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
                 status = acpi_run_oshp(handle);
                 if (ACPI_SUCCESS(status))
                         goto got_one;
-                if (acpi_root_bridge(handle))
+                if (acpi_is_root_bridge(handle))
                         break;
                 chandle = handle;
                 status = acpi_get_parent(chandle, &handle);
@@ -449,42 +449,6 @@ got_one:
 }
 EXPORT_SYMBOL(acpi_get_hp_hw_control_from_firmware);
 
-/* acpi_root_bridge - check to see if this acpi object is a root bridge
- *
- * @handle - the acpi object in question.
- */
-int acpi_root_bridge(acpi_handle handle)
-{
-        acpi_status status;
-        struct acpi_device_info *info;
-        struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
-        int i;
-
-        status = acpi_get_object_info(handle, &buffer);
-        if (ACPI_SUCCESS(status)) {
-                info = buffer.pointer;
-                if ((info->valid & ACPI_VALID_HID) &&
-                        !strcmp(PCI_ROOT_HID_STRING,
-                                        info->hardware_id.value)) {
-                        kfree(buffer.pointer);
-                        return 1;
-                }
-                if (info->valid & ACPI_VALID_CID) {
-                        for (i=0; i < info->compatibility_id.count; i++) {
-                                if (!strcmp(PCI_ROOT_HID_STRING,
-                                        info->compatibility_id.id[i].value)) {
-                                        kfree(buffer.pointer);
-                                        return 1;
-                                }
-                        }
-                }
-                kfree(buffer.pointer);
-        }
-        return 0;
-}
-EXPORT_SYMBOL_GPL(acpi_root_bridge);
-
-
 static int is_ejectable(acpi_handle handle)
 {
         acpi_status status;
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 3a6064bce561..fc6636e3300b 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -1631,7 +1631,7 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
         int *count = (int *)context;
 
-        if (acpi_root_bridge(handle)) {
+        if (acpi_is_root_bridge(handle)) {
                 acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
                                 handle_hotplug_event_bridge, NULL);
                         (*count)++;