PCI: factor pci_bus_add_child() from pci_bus_add_devices()

This patch splits a new function, pci_bus_add_child(), from
pci_bus_add_devices(). The new function can be used to register PCI
buses to the device core.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

2 files changed, 34 insertions, 23 deletions

diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 1b6de1b565aa..52b54f053be0 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -91,6 +91,37 @@ int pci_bus_add_device(struct pci_dev *dev)
 }
 
 /**
+ * pci_bus_add_child - add a child bus
+ * @bus: bus to add
+ *
+ * This adds sysfs entries for a single bus
+ */
+int pci_bus_add_child(struct pci_bus *bus)
+{
+        int retval;
+
+        if (bus->bridge)
+                bus->dev.parent = bus->bridge;
+
+        retval = device_register(&bus->dev);
+        if (retval)
+                return retval;
+
+        bus->is_added = 1;
+
+        retval = device_create_file(&bus->dev, &dev_attr_cpuaffinity);
+        if (retval)
+                return retval;
+
+        retval = device_create_file(&bus->dev, &dev_attr_cpulistaffinity);
+
+        /* Create legacy_io and legacy_mem files for this bus */
+        pci_create_legacy_files(bus);
+
+        return retval;
+}
+
+/**
  * pci_bus_add_devices - insert newly discovered PCI devices
  * @bus: bus to check for new devices
  *
@@ -140,30 +171,9 @@ void pci_bus_add_devices(struct pci_bus *bus)
                  */
                 if (child->is_added)
                         continue;
-                child->dev.parent = child->bridge;
-                retval = device_register(&child->dev);
+                retval = pci_bus_add_child(child);
                 if (retval)
-                        dev_err(&dev->dev, "Error registering pci_bus,"
-                                " continuing...\n");
-                else {
-                        child->is_added = 1;
-                        retval = device_create_file(&child->dev,
-                                                &dev_attr_cpuaffinity);
-                        if (retval)
-                                dev_err(&dev->dev, "Error creating cpuaffinity"
-                                        " file, continuing...\n");
-
-                        retval = device_create_file(&child->dev,
-                                                &dev_attr_cpulistaffinity);
-                        if (retval)
-                                dev_err(&dev->dev,
-                                        "Error creating cpulistaffinity"
-                                        " file, continuing...\n");
-
-                        /* Create legacy_io and legacy_mem files for this bus */
-                        pci_create_legacy_files(child_bus);
-
-                }
+                        dev_err(&dev->dev, "Error adding bus, continuing\n");
         }
 }
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index c4f4a1e6ea28..d1e92d83aa06 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -173,6 +173,7 @@ extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                                 struct resource *res, unsigned int reg);
 extern int pci_resource_bar(struct pci_dev *dev, int resno,
                             enum pci_bar_type *type);
+extern int pci_bus_add_child(struct pci_bus *bus);
 extern void pci_enable_ari(struct pci_dev *dev);
 /**
  * pci_ari_enabled - query ARI forwarding status