1 files changed, 17 insertions, 6 deletions

diff --git a/drivers/base/class.c b/drivers/base/class.c
index d164c32a97ad..ce23dc8c18c5 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -189,12 +189,11 @@ struct class *class_create(struct module *owner, char *name)
         struct class *cls;
         int retval;
 
-        cls = kmalloc(sizeof(struct class), GFP_KERNEL);
+        cls = kzalloc(sizeof(*cls), GFP_KERNEL);
         if (!cls) {
                 retval = -ENOMEM;
                 goto error;
         }
-        memset(cls, 0x00, sizeof(struct class));
 
         cls->name = name;
         cls->owner = owner;
@@ -500,13 +499,13 @@ int class_device_add(struct class_device *class_dev)
         /* add the needed attributes to this device */
         if (MAJOR(class_dev->devt)) {
                 struct class_device_attribute *attr;
-                attr = kmalloc(sizeof(*attr), GFP_KERNEL);
+                attr = kzalloc(sizeof(*attr), GFP_KERNEL);
                 if (!attr) {
                         error = -ENOMEM;
                         kobject_del(&class_dev->kobj);
                         goto register_done;
                 }
-                memset(attr, sizeof(*attr), 0x00);
+
                 attr->attr.name = "dev";
                 attr->attr.mode = S_IRUGO;
                 attr->attr.owner = parent->owner;
@@ -577,12 +576,11 @@ struct class_device *class_device_create(struct class *cls, dev_t devt,
         if (cls == NULL || IS_ERR(cls))
                 goto error;
 
-        class_dev = kmalloc(sizeof(struct class_device), GFP_KERNEL);
+        class_dev = kzalloc(sizeof(*class_dev), GFP_KERNEL);
         if (!class_dev) {
                 retval = -ENOMEM;
                 goto error;
         }
-        memset(class_dev, 0x00, sizeof(struct class_device));
 
         class_dev->devt = devt;
         class_dev->dev = device;
@@ -671,6 +669,7 @@ void class_device_destroy(struct class *cls, dev_t devt)
 int class_device_rename(struct class_device *class_dev, char *new_name)
 {
         int error = 0;
+        char *old_class_name = NULL, *new_class_name = NULL;
 
         class_dev = class_device_get(class_dev);
         if (!class_dev)
@@ -679,12 +678,24 @@ int class_device_rename(struct class_device *class_dev, char *new_name)
         pr_debug("CLASS: renaming '%s' to '%s'\n", class_dev->class_id,
                  new_name);
 
+        if (class_dev->dev)
+                old_class_name = make_class_name(class_dev);
+
         strlcpy(class_dev->class_id, new_name, KOBJ_NAME_LEN);
 
         error = kobject_rename(&class_dev->kobj, new_name);
 
+        if (class_dev->dev) {
+                new_class_name = make_class_name(class_dev);
+                sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj,
+                                  new_class_name);
+                sysfs_remove_link(&class_dev->dev->kobj, old_class_name);
+        }
         class_device_put(class_dev);
 
+        kfree(old_class_name);
+        kfree(new_class_name);
+
         return error;
 }