X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fbase%2Fcore.c;h=a8ac34ba610716a4fc5c4193920a3d44a4697ccd;hb=9121c77706a4bd75a878573c913553ade120e9ce;hp=5d11bbdfbd2f9c99b318f4c54b8b1fa4848fec9c;hpb=289535334646796fe41f199718e4a731f7411a92;p=powerpc.git

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 5d11bbdfbd..a8ac34ba61 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -95,6 +95,8 @@ static void device_release(struct kobject * kobj)
 
 	if (dev->release)
 		dev->release(dev);
+	else if (dev->type && dev->type->release)
+		dev->type->release(dev);
 	else if (dev->class && dev->class->dev_release)
 		dev->class->dev_release(dev);
 	else {
@@ -154,25 +156,47 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
 			       "MINOR=%u", MINOR(dev->devt));
 	}
 
-#ifdef CONFIG_SYSFS_DEPRECATED
-	/* add bus name (same as SUBSYSTEM, deprecated) */
-	if (dev->bus)
-		add_uevent_var(envp, num_envp, &i,
-			       buffer, buffer_size, &length,
-			       "PHYSDEVBUS=%s", dev->bus->name);
-#endif
-
-	/* add driver name (PHYSDEV* values are deprecated)*/
-	if (dev->driver) {
+	if (dev->driver)
 		add_uevent_var(envp, num_envp, &i,
 			       buffer, buffer_size, &length,
 			       "DRIVER=%s", dev->driver->name);
+
 #ifdef CONFIG_SYSFS_DEPRECATED
+	if (dev->class) {
+		struct device *parent = dev->parent;
+
+		/* find first bus device in parent chain */
+		while (parent && !parent->bus)
+			parent = parent->parent;
+		if (parent && parent->bus) {
+			const char *path;
+
+			path = kobject_get_path(&parent->kobj, GFP_KERNEL);
+			add_uevent_var(envp, num_envp, &i,
+				       buffer, buffer_size, &length,
+				       "PHYSDEVPATH=%s", path);
+			kfree(path);
+
+			add_uevent_var(envp, num_envp, &i,
+				       buffer, buffer_size, &length,
+				       "PHYSDEVBUS=%s", parent->bus->name);
+
+			if (parent->driver)
+				add_uevent_var(envp, num_envp, &i,
+					       buffer, buffer_size, &length,
+					       "PHYSDEVDRIVER=%s", parent->driver->name);
+		}
+	} else if (dev->bus) {
 		add_uevent_var(envp, num_envp, &i,
 			       buffer, buffer_size, &length,
-			       "PHYSDEVDRIVER=%s", dev->driver->name);
-#endif
+			       "PHYSDEVBUS=%s", dev->bus->name);
+
+		if (dev->driver)
+			add_uevent_var(envp, num_envp, &i,
+				       buffer, buffer_size, &length,
+				       "PHYSDEVDRIVER=%s", dev->driver->name);
 	}
+#endif
 
 	/* terminate, set to next free slot, shrink available space */
 	envp[i] = NULL;
@@ -184,19 +208,25 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
 	if (dev->bus && dev->bus->uevent) {
 		/* have the bus specific function add its stuff */
 		retval = dev->bus->uevent(dev, envp, num_envp, buffer, buffer_size);
-			if (retval) {
-			pr_debug ("%s - uevent() returned %d\n",
+		if (retval)
+			pr_debug ("%s: bus uevent() returned %d\n",
 				  __FUNCTION__, retval);
-		}
 	}
 
 	if (dev->class && dev->class->dev_uevent) {
 		/* have the class specific function add its stuff */
 		retval = dev->class->dev_uevent(dev, envp, num_envp, buffer, buffer_size);
-			if (retval) {
-				pr_debug("%s - dev_uevent() returned %d\n",
-					 __FUNCTION__, retval);
-		}
+		if (retval)
+			pr_debug("%s: class uevent() returned %d\n",
+				 __FUNCTION__, retval);
+	}
+
+	if (dev->type && dev->type->uevent) {
+		/* have the device type specific fuction add its stuff */
+		retval = dev->type->uevent(dev, envp, num_envp, buffer, buffer_size);
+		if (retval)
+			pr_debug("%s: dev_type uevent() returned %d\n",
+				 __FUNCTION__, retval);
 	}
 
 	return retval;
@@ -247,37 +277,50 @@ static void device_remove_groups(struct device *dev)
 static int device_add_attrs(struct device *dev)
 {
 	struct class *class = dev->class;
+	struct device_type *type = dev->type;
 	int error = 0;
 	int i;
 
-	if (!class)
-		return 0;
-
-	if (class->dev_attrs) {
+	if (class && class->dev_attrs) {
 		for (i = 0; attr_name(class->dev_attrs[i]); i++) {
 			error = device_create_file(dev, &class->dev_attrs[i]);
 			if (error)
 				break;
 		}
+		if (error)
+			while (--i >= 0)
+				device_remove_file(dev, &class->dev_attrs[i]);
 	}
-	if (error)
-		while (--i >= 0)
-			device_remove_file(dev, &class->dev_attrs[i]);
+
+	if (type && type->attrs) {
+		for (i = 0; attr_name(type->attrs[i]); i++) {
+			error = device_create_file(dev, &type->attrs[i]);
+			if (error)
+				break;
+		}
+		if (error)
+			while (--i >= 0)
+				device_remove_file(dev, &type->attrs[i]);
+	}
+
 	return error;
 }
 
 static void device_remove_attrs(struct device *dev)
 {
 	struct class *class = dev->class;
+	struct device_type *type = dev->type;
 	int i;
 
-	if (!class)
-		return;
-
-	if (class->dev_attrs) {
+	if (class && class->dev_attrs) {
 		for (i = 0; attr_name(class->dev_attrs[i]); i++)
 			device_remove_file(dev, &class->dev_attrs[i]);
 	}
+
+	if (type && type->attrs) {
+		for (i = 0; attr_name(type->attrs[i]); i++)
+			device_remove_file(dev, &type->attrs[i]);
+	}
 }
 
 
@@ -385,26 +428,30 @@ void device_initialize(struct device *dev)
 	INIT_LIST_HEAD(&dev->dma_pools);
 	INIT_LIST_HEAD(&dev->node);
 	init_MUTEX(&dev->sem);
+	spin_lock_init(&dev->devres_lock);
+	INIT_LIST_HEAD(&dev->devres_head);
 	device_init_wakeup(dev, 0);
+	set_dev_node(dev, -1);
 }
 
 #ifdef CONFIG_SYSFS_DEPRECATED
-int setup_parent(struct device *dev, struct device *parent)
+static struct kobject * get_device_parent(struct device *dev,
+					  struct device *parent)
 {
 	/* Set the parent to the class, not the parent device */
 	/* this keeps sysfs from having a symlink to make old udevs happy */
 	if (dev->class)
-		dev->kobj.parent = &dev->class->subsys.kset.kobj;
+		return &dev->class->subsys.kset.kobj;
 	else if (parent)
-		dev->kobj.parent = &parent->kobj;
+		return &parent->kobj;
 
-	return 0;
+	return NULL;
 }
 #else
-static int virtual_device_parent(struct device *dev)
+static struct kobject * virtual_device_parent(struct device *dev)
 {
 	if (!dev->class)
-		return -ENODEV;
+		return ERR_PTR(-ENODEV);
 
 	if (!dev->class->virtual_dir) {
 		static struct kobject *virtual_dir = NULL;
@@ -414,25 +461,31 @@ static int virtual_device_parent(struct device *dev)
 		dev->class->virtual_dir = kobject_add_dir(virtual_dir, dev->class->name);
 	}
 
-	dev->kobj.parent = dev->class->virtual_dir;
-	return 0;
+	return dev->class->virtual_dir;
 }
 
-int setup_parent(struct device *dev, struct device *parent)
+static struct kobject * get_device_parent(struct device *dev,
+					  struct device *parent)
 {
-	int error;
-
 	/* if this is a class device, and has no parent, create one */
 	if ((dev->class) && (parent == NULL)) {
-		error = virtual_device_parent(dev);
-		if (error)
-			return error;
+		return virtual_device_parent(dev);
 	} else if (parent)
-		dev->kobj.parent = &parent->kobj;
+		return &parent->kobj;
+	return NULL;
+}
 
+#endif
+static int setup_parent(struct device *dev, struct device *parent)
+{
+	struct kobject *kobj;
+	kobj = get_device_parent(dev, parent);
+	if (IS_ERR(kobj))
+		return PTR_ERR(kobj);
+	if (kobj)
+		dev->kobj.parent = kobj;
 	return 0;
 }
-#endif
 
 /**
  *	device_add - add device to device hierarchy.
@@ -519,9 +572,13 @@ int device_add(struct device *dev)
 					  &dev->kobj, dev->bus_id);
 #ifdef CONFIG_SYSFS_DEPRECATED
 		if (parent) {
-			sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device");
-			class_name = make_class_name(dev->class->name, &dev->kobj);
-			sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
+			sysfs_create_link(&dev->kobj, &dev->parent->kobj,
+							"device");
+			class_name = make_class_name(dev->class->name,
+							&dev->kobj);
+			if (class_name)
+				sysfs_create_link(&dev->parent->kobj,
+						  &dev->kobj, class_name);
 		}
 #endif
 	}
@@ -534,7 +591,8 @@ int device_add(struct device *dev)
 		goto PMError;
 	if ((error = bus_add_device(dev)))
 		goto BusError;
-	kobject_uevent(&dev->kobj, KOBJ_ADD);
+	if (!dev->uevent_suppress)
+		kobject_uevent(&dev->kobj, KOBJ_ADD);
 	if ((error = bus_attach_device(dev)))
 		goto AttachError;
 	if (parent)
@@ -664,7 +722,9 @@ void device_del(struct device * dev)
 		if (parent) {
 			char *class_name = make_class_name(dev->class->name,
 							   &dev->kobj);
-			sysfs_remove_link(&dev->parent->kobj, class_name);
+			if (class_name)
+				sysfs_remove_link(&dev->parent->kobj,
+						  class_name);
 			kfree(class_name);
 			sysfs_remove_link(&dev->kobj, "device");
 		}
@@ -750,12 +810,45 @@ int device_for_each_child(struct device * parent, void * data,
 	return error;
 }
 
+/**
+ * device_find_child - device iterator for locating a particular device.
+ * @parent: parent struct device
+ * @data: Data to pass to match function
+ * @match: Callback function to check device
+ *
+ * This is similar to the device_for_each_child() function above, but it
+ * returns a reference to a device that is 'found' for later use, as
+ * determined by the @match callback.
+ *
+ * The callback should return 0 if the device doesn't match and non-zero
+ * if it does.  If the callback returns non-zero and a reference to the
+ * current device can be obtained, this function will return to the caller
+ * and not iterate over any more devices.
+ */
+struct device * device_find_child(struct device *parent, void *data,
+				  int (*match)(struct device *, void *))
+{
+	struct klist_iter i;
+	struct device *child;
+
+	if (!parent)
+		return NULL;
+
+	klist_iter_init(&parent->klist_children, &i);
+	while ((child = next_device(&i)))
+		if (match(child, data) && get_device(child))
+			break;
+	klist_iter_exit(&i);
+	return child;
+}
+
 int __init devices_init(void)
 {
 	return subsystem_register(&devices_subsys);
 }
 
 EXPORT_SYMBOL_GPL(device_for_each_child);
+EXPORT_SYMBOL_GPL(device_find_child);
 
 EXPORT_SYMBOL_GPL(device_initialize);
 EXPORT_SYMBOL_GPL(device_add);
@@ -922,3 +1015,101 @@ int device_rename(struct device *dev, char *new_name)
 
 	return error;
 }
+
+
+static int device_move_class_links(struct device *dev,
+				   struct device *old_parent,
+				   struct device *new_parent)
+{
+#ifdef CONFIG_SYSFS_DEPRECATED
+	int error;
+	char *class_name;
+
+	class_name = make_class_name(dev->class->name, &dev->kobj);
+	if (!class_name) {
+		error = -ENOMEM;
+		goto out;
+	}
+	if (old_parent) {
+		sysfs_remove_link(&dev->kobj, "device");
+		sysfs_remove_link(&old_parent->kobj, class_name);
+	}
+	if (new_parent) {
+		error = sysfs_create_link(&dev->kobj, &new_parent->kobj,
+					  "device");
+		if (error)
+			goto out;
+		error = sysfs_create_link(&new_parent->kobj, &dev->kobj,
+					  class_name);
+		if (error)
+			sysfs_remove_link(&dev->kobj, "device");
+	}
+	else
+		error = 0;
+out:
+	kfree(class_name);
+	return error;
+#else
+	return 0;
+#endif
+}
+
+/**
+ * device_move - moves a device to a new parent
+ * @dev: the pointer to the struct device to be moved
+ * @new_parent: the new parent of the device (can by NULL)
+ */
+int device_move(struct device *dev, struct device *new_parent)
+{
+	int error;
+	struct device *old_parent;
+	struct kobject *new_parent_kobj;
+
+	dev = get_device(dev);
+	if (!dev)
+		return -EINVAL;
+
+	new_parent = get_device(new_parent);
+	new_parent_kobj = get_device_parent (dev, new_parent);
+	if (IS_ERR(new_parent_kobj)) {
+		error = PTR_ERR(new_parent_kobj);
+		put_device(new_parent);
+		goto out;
+	}
+	pr_debug("DEVICE: moving '%s' to '%s'\n", dev->bus_id,
+		 new_parent ? new_parent->bus_id : "<NULL>");
+	error = kobject_move(&dev->kobj, new_parent_kobj);
+	if (error) {
+		put_device(new_parent);
+		goto out;
+	}
+	old_parent = dev->parent;
+	dev->parent = new_parent;
+	if (old_parent)
+		klist_remove(&dev->knode_parent);
+	if (new_parent)
+		klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
+	if (!dev->class)
+		goto out_put;
+	error = device_move_class_links(dev, old_parent, new_parent);
+	if (error) {
+		/* We ignore errors on cleanup since we're hosed anyway... */
+		device_move_class_links(dev, new_parent, old_parent);
+		if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
+			if (new_parent)
+				klist_remove(&dev->knode_parent);
+			if (old_parent)
+				klist_add_tail(&dev->knode_parent,
+					       &old_parent->klist_children);
+		}
+		put_device(new_parent);
+		goto out;
+	}
+out_put:
+	put_device(old_parent);
+out:
+	put_device(dev);
+	return error;
+}
+
+EXPORT_SYMBOL_GPL(device_move);