driver core: try parent numa_node at first before using default

in the device_add, we try to use use parent numa_node.
need to make sure pci root bus's bridge device numa_node is set.
then we could use device->numa_node direclty for all device.
and don't need to call pcibus_to_node().

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 9248e0927d08..be288b5e4180 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -787,6 +787,10 @@ int device_add(struct device *dev)
         parent = get_device(dev->parent);
         setup_parent(dev, parent);
 
+        /* use parent numa_node */
+        if (parent)
+                set_dev_node(dev, dev_to_node(parent));
+
         /* first, register with generic layer. */
         error = kobject_add(&dev->kobj, dev->kobj.parent, "%s", dev->bus_id);
         if (error)
@@ -1306,8 +1310,11 @@ int device_move(struct device *dev, struct device *new_parent)
         dev->parent = new_parent;
         if (old_parent)
                 klist_remove(&dev->knode_parent);
-        if (new_parent)
+        if (new_parent) {
                 klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
+                set_dev_node(dev, dev_to_node(new_parent));
+        }
+
         if (!dev->class)
                 goto out_put;
         error = device_move_class_links(dev, old_parent, new_parent);
@@ -1317,9 +1324,12 @@ int device_move(struct device *dev, struct device *new_parent)
                 if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
                         if (new_parent)
                                 klist_remove(&dev->knode_parent);
-                        if (old_parent)
+                        dev->parent = old_parent;
+                        if (old_parent) {
                                 klist_add_tail(&dev->knode_parent,
                                                &old_parent->klist_children);
+                                set_dev_node(dev, dev_to_node(old_parent));
+                        }
                 }
                 cleanup_glue_dir(dev, new_parent_kobj);
                 put_device(new_parent);