1 files changed, 50 insertions, 23 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index cf2a398aaaa1..d7fcf823a42a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -28,20 +28,6 @@ int (*platform_notify)(struct device * dev) = NULL;
 int (*platform_notify_remove)(struct device * dev) = NULL;
 
 /*
- * Detect the LANANA-assigned LOCAL/EXPERIMENTAL majors
- */
-bool is_lanana_major(unsigned int major)
-{
-        if (major >= 60 && major <= 63)
-                return 1;
-        if (major >= 120 && major <= 127)
-                return 1;
-        if (major >= 240 && major <= 254)
-                return 1;
-        return 0;
-}
-
-/*
  * sysfs bindings for devices.
  */
 
@@ -407,6 +393,35 @@ void device_remove_bin_file(struct device *dev, struct bin_attribute *attr)
 }
 EXPORT_SYMBOL_GPL(device_remove_bin_file);
 
+/**
+ * device_schedule_callback - helper to schedule a callback for a device
+ * @dev: device.
+ * @func: callback function to invoke later.
+ *
+ * Attribute methods must not unregister themselves or their parent device
+ * (which would amount to the same thing).  Attempts to do so will deadlock,
+ * since unregistration is mutually exclusive with driver callbacks.
+ *
+ * Instead methods can call this routine, which will attempt to allocate
+ * and schedule a workqueue request to call back @func with @dev as its
+ * argument in the workqueue's process context.  @dev will be pinned until
+ * @func returns.
+ *
+ * Returns 0 if the request was submitted, -ENOMEM if storage could not
+ * be allocated.
+ *
+ * NOTE: This routine won't work if CONFIG_SYSFS isn't set!  It uses an
+ * underlying sysfs routine (since it is intended for use by attribute
+ * methods), and if sysfs isn't available you'll get nothing but -ENOSYS.
+ */
+int device_schedule_callback(struct device *dev,
+                void (*func)(struct device *))
+{
+        return sysfs_schedule_callback(&dev->kobj,
+                        (void (*)(void *)) func, dev);
+}
+EXPORT_SYMBOL_GPL(device_schedule_callback);
+
 static void klist_children_get(struct klist_node *n)
 {
         struct device *dev = container_of(n, struct device, knode_parent);
@@ -584,17 +599,17 @@ int device_add(struct device *dev)
                 if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
                         sysfs_create_link(&dev->class->subsys.kset.kobj,
                                           &dev->kobj, dev->bus_id);
-#ifdef CONFIG_SYSFS_DEPRECATED
                 if (parent) {
                         sysfs_create_link(&dev->kobj, &dev->parent->kobj,
                                                         "device");
+#ifdef CONFIG_SYSFS_DEPRECATED
                         class_name = make_class_name(dev->class->name,
                                                         &dev->kobj);
                         if (class_name)
                                 sysfs_create_link(&dev->parent->kobj,
                                                   &dev->kobj, class_name);
-                }
 #endif
+                }
         }
 
         if ((error = device_add_attrs(dev)))
@@ -651,17 +666,17 @@ int device_add(struct device *dev)
                 if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
                         sysfs_remove_link(&dev->class->subsys.kset.kobj,
                                           dev->bus_id);
-#ifdef CONFIG_SYSFS_DEPRECATED
                 if (parent) {
+#ifdef CONFIG_SYSFS_DEPRECATED
                         char *class_name = make_class_name(dev->class->name,
                                                            &dev->kobj);
                         if (class_name)
                                 sysfs_remove_link(&dev->parent->kobj,
                                                   class_name);
                         kfree(class_name);
+#endif
                         sysfs_remove_link(&dev->kobj, "device");
                 }
-#endif
 
                 down(&dev->class->sem);
                 /* notify any interfaces that the device is now gone */
@@ -761,17 +776,17 @@ void device_del(struct device * dev)
                 if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
                         sysfs_remove_link(&dev->class->subsys.kset.kobj,
                                           dev->bus_id);
-#ifdef CONFIG_SYSFS_DEPRECATED
                 if (parent) {
+#ifdef CONFIG_SYSFS_DEPRECATED
                         char *class_name = make_class_name(dev->class->name,
                                                            &dev->kobj);
                         if (class_name)
                                 sysfs_remove_link(&dev->parent->kobj,
                                                   class_name);
                         kfree(class_name);
+#endif
                         sysfs_remove_link(&dev->kobj, "device");
                 }
-#endif
 
                 down(&dev->class->sem);
                 /* notify any interfaces that the device is now gone */
@@ -787,6 +802,13 @@ void device_del(struct device * dev)
         device_remove_attrs(dev);
         bus_remove_device(dev);
 
+        /*
+         * Some platform devices are driven without driver attached
+         * and managed resources may have been acquired.  Make sure
+         * all resources are released.
+         */
+        devres_release_all(dev);
+
         /* Notify the platform of the removal, in case they
          * need to do anything...
          */
@@ -1058,14 +1080,14 @@ int device_rename(struct device *dev, char *new_name)
 
         return error;
 }
-
+EXPORT_SYMBOL_GPL(device_rename);
 
 static int device_move_class_links(struct device *dev,
                                    struct device *old_parent,
                                    struct device *new_parent)
 {
+        int error = 0;
 #ifdef CONFIG_SYSFS_DEPRECATED
-        int error;
         char *class_name;
 
         class_name = make_class_name(dev->class->name, &dev->kobj);
@@ -1093,7 +1115,12 @@ out:
         kfree(class_name);
         return error;
 #else
-        return 0;
+        if (old_parent)
+                sysfs_remove_link(&dev->kobj, "device");
+        if (new_parent)
+                error = sysfs_create_link(&dev->kobj, &new_parent->kobj,
+                                          "device");
+        return error;
 #endif
 }