Kobject: auto-cleanup on final unref

[linux-2.6-omap-h63xx.git] / drivers / base / core.c

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 675a719dcdd29f5921552fbc945f13eafccd981d..d5d542db96fd4f6114108d8756b8baceda83393f 100644 (file)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -576,8 +576,8 @@ static struct kobject *get_device_parent(struct device *dev,
 
                /*
                 * If we have no parent, we live in "virtual".
-                * Class-devices with a bus-device as parent, live
-                * in a class-directory to prevent namespace collisions.
+                * Class-devices with a non class-device as parent, live
+                * in a "glue" directory to prevent namespace collisions.
                 */
                if (parent == NULL)
                        parent_kobj = virtual_device_parent(dev);
@@ -607,8 +607,7 @@ static struct kobject *get_device_parent(struct device *dev,
                        kobject_put(k);
                        return NULL;
                }
-               /* Do not emit a uevent, as it's not needed for this
-                * "class glue" directory. */
+               /* do not emit an uevent for this simple "glue" directory */
                return k;
        }
 
@@ -619,30 +618,13 @@ static struct kobject *get_device_parent(struct device *dev,
 
 static void cleanup_device_parent(struct device *dev)
 {
-       struct device *d;
-       int other = 0;
+       struct kobject *glue_dir = dev->kobj.parent;
 
-       if (!dev->class)
-               return;
-
-       /* see if we live in a parent class directory */
-       if (dev->kobj.parent->kset != &dev->class->class_dirs)
+       /* see if we live in a "glue" directory */
+       if (!dev->class || glue_dir->kset != &dev->class->class_dirs)
                return;
 
-       /* if we are the last child of our class, delete the directory */
-       down(&dev->class->sem);
-       list_for_each_entry(d, &dev->class->devices, node) {
-               if (d == dev)
-                       continue;
-               if (d->kobj.parent == dev->kobj.parent) {
-                       other = 1;
-                       break;
-               }
-       }
-       if (!other)
-               kobject_del(dev->kobj.parent);
-       kobject_put(dev->kobj.parent);
-       up(&dev->class->sem);
+       kobject_put(glue_dir);
 }
 #endif