driver core: move knode_bus into private structure

[safe/jmp/linux-2.6] / drivers / base / core.c

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 55e5309..a90f56f 100644 (file)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -109,6 +109,7 @@ static struct sysfs_ops dev_sysfs_ops = {
 static void device_release(struct kobject *kobj)
 {
        struct device *dev = to_dev(kobj);
+       struct device_private *p = dev->p;
 
        if (dev->release)
                dev->release(dev);
@@ -120,6 +121,7 @@ static void device_release(struct kobject *kobj)
                WARN(1, KERN_ERR "Device '%s' does not have a release() "
                        "function, it is broken and must be fixed.\n",
                        dev_name(dev));
+       kfree(p);
 }
 
 static struct kobj_type device_ktype = {
@@ -507,14 +509,16 @@ EXPORT_SYMBOL_GPL(device_schedule_callback_owner);
 
 static void klist_children_get(struct klist_node *n)
 {
-       struct device *dev = container_of(n, struct device, knode_parent);
+       struct device_private *p = to_device_private_parent(n);
+       struct device *dev = p->device;
 
        get_device(dev);
 }
 
 static void klist_children_put(struct klist_node *n)
 {
-       struct device *dev = container_of(n, struct device, knode_parent);
+       struct device_private *p = to_device_private_parent(n);
+       struct device *dev = p->device;
 
        put_device(dev);
 }
@@ -538,8 +542,6 @@ void device_initialize(struct device *dev)
 {
        dev->kobj.kset = devices_kset;
        kobject_init(&dev->kobj, &device_ktype);
-       klist_init(&dev->klist_children, klist_children_get,
-                  klist_children_put);
        INIT_LIST_HEAD(&dev->dma_pools);
        init_MUTEX(&dev->sem);
        spin_lock_init(&dev->devres_lock);
@@ -777,17 +779,12 @@ static void device_remove_class_symlinks(struct device *dev)
 int dev_set_name(struct device *dev, const char *fmt, ...)
 {
        va_list vargs;
-       char *s;
+       int err;
 
        va_start(vargs, fmt);
-       vsnprintf(dev->bus_id, sizeof(dev->bus_id), fmt, vargs);
+       err = kobject_set_name_vargs(&dev->kobj, fmt, vargs);
        va_end(vargs);
-
-       /* ewww... some of these buggers have / in the name... */
-       while ((s = strchr(dev->bus_id, '/')))
-               *s = '!';
-
-       return 0;
+       return err;
 }
 EXPORT_SYMBOL_GPL(dev_set_name);
 
@@ -864,12 +861,26 @@ int device_add(struct device *dev)
        if (!dev)
                goto done;
 
-       /* Temporarily support init_name if it is set.
-        * It will override bus_id for now */
-       if (dev->init_name)
-               dev_set_name(dev, "%s", dev->init_name);
+       dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
+       if (!dev->p) {
+               error = -ENOMEM;
+               goto done;
+       }
+       dev->p->device = dev;
+       klist_init(&dev->p->klist_children, klist_children_get,
+                  klist_children_put);
+
+       /*
+        * for statically allocated devices, which should all be converted
+        * some day, we need to initialize the name. We prevent reading back
+        * the name, and force the use of dev_name()
+        */
+       if (dev->init_name) {
+               dev_set_name(dev, dev->init_name);
+               dev->init_name = NULL;
+       }
 
-       if (!strlen(dev->bus_id))
+       if (!dev_name(dev))
                goto done;
 
        pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
@@ -928,7 +939,8 @@ int device_add(struct device *dev)
        kobject_uevent(&dev->kobj, KOBJ_ADD);
        bus_attach_device(dev);
        if (parent)
-               klist_add_tail(&dev->knode_parent, &parent->klist_children);
+               klist_add_tail(&dev->p->knode_parent,
+                              &parent->p->klist_children);
 
        if (dev->class) {
                mutex_lock(&dev->class->p->class_mutex);
@@ -1042,7 +1054,7 @@ void device_del(struct device *dev)
        device_pm_remove(dev);
        dpm_sysfs_remove(dev);
        if (parent)
-               klist_del(&dev->knode_parent);
+               klist_del(&dev->p->knode_parent);
        if (MAJOR(dev->devt)) {
                device_remove_sys_dev_entry(dev);
                device_remove_file(dev, &devt_attr);
@@ -1103,7 +1115,14 @@ void device_unregister(struct device *dev)
 static struct device *next_device(struct klist_iter *i)
 {
        struct klist_node *n = klist_next(i);
-       return n ? container_of(n, struct device, knode_parent) : NULL;
+       struct device *dev = NULL;
+       struct device_private *p;
+
+       if (n) {
+               p = to_device_private_parent(n);
+               dev = p->device;
+       }
+       return dev;
 }
 
 /**
@@ -1125,7 +1144,7 @@ int device_for_each_child(struct device *parent, void *data,
        struct device *child;
        int error = 0;
 
-       klist_iter_init(&parent->klist_children, &i);
+       klist_iter_init(&parent->p->klist_children, &i);
        while ((child = next_device(&i)) && !error)
                error = fn(child, data);
        klist_iter_exit(&i);
@@ -1156,7 +1175,7 @@ struct device *device_find_child(struct device *parent, void *data,
        if (!parent)
                return NULL;
 
-       klist_iter_init(&parent->klist_children, &i);
+       klist_iter_init(&parent->p->klist_children, &i);
        while ((child = next_device(&i)))
                if (match(child, data) && get_device(child))
                        break;
@@ -1280,7 +1299,7 @@ EXPORT_SYMBOL_GPL(__root_device_register);
 
 /**
  * root_device_unregister - unregister and free a root device
- * @root: device going away.
+ * @dev: device going away
  *
  * This function unregisters and cleans up a device that was created by
  * root_device_register().
@@ -1348,7 +1367,10 @@ struct device *device_create_vargs(struct class *class, struct device *parent,
        dev->release = device_create_release;
        dev_set_drvdata(dev, drvdata);
 
-       vsnprintf(dev->bus_id, BUS_ID_SIZE, fmt, args);
+       retval = kobject_set_name_vargs(&dev->kobj, fmt, args);
+       if (retval)
+               goto error;
+
        retval = device_register(dev);
        if (retval)
                goto error;
@@ -1452,19 +1474,15 @@ int device_rename(struct device *dev, char *new_name)
                old_class_name = make_class_name(dev->class->name, &dev->kobj);
 #endif
 
-       old_device_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
+       old_device_name = kstrdup(dev_name(dev), GFP_KERNEL);
        if (!old_device_name) {
                error = -ENOMEM;
                goto out;
        }
-       strlcpy(old_device_name, dev->bus_id, BUS_ID_SIZE);
-       strlcpy(dev->bus_id, new_name, BUS_ID_SIZE);
 
        error = kobject_rename(&dev->kobj, new_name);
-       if (error) {
-               strlcpy(dev->bus_id, old_device_name, BUS_ID_SIZE);
+       if (error)
                goto out;
-       }
 
 #ifdef CONFIG_SYSFS_DEPRECATED
        if (old_class_name) {
@@ -1570,9 +1588,10 @@ int device_move(struct device *dev, struct device *new_parent)
        old_parent = dev->parent;
        dev->parent = new_parent;
        if (old_parent)
-               klist_remove(&dev->knode_parent);
+               klist_remove(&dev->p->knode_parent);
        if (new_parent) {
-               klist_add_tail(&dev->knode_parent, &new_parent->klist_children);
+               klist_add_tail(&dev->p->knode_parent,
+                              &new_parent->p->klist_children);
                set_dev_node(dev, dev_to_node(new_parent));
        }
 
@@ -1584,11 +1603,11 @@ int device_move(struct device *dev, struct device *new_parent)
                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);
+                               klist_remove(&dev->p->knode_parent);
                        dev->parent = old_parent;
                        if (old_parent) {
-                               klist_add_tail(&dev->knode_parent,
-                                              &old_parent->klist_children);
+                               klist_add_tail(&dev->p->knode_parent,
+                                              &old_parent->p->klist_children);
                                set_dev_node(dev, dev_to_node(old_parent));
                        }
                }