[PATCH] driver-model: device_add() error path reference counting fix

 df_05_device_add_ref_fix.patch

 In device_add(), @dev wan't put'd properly when it has zero length
bus_id (error path).  Fixed.
Signed-off-by: Tejun Heo <tj@home-tj.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/base/core.c

@@ -209,12 +209,12 @@ void device_initialize(struct device *dev)
  */
 int device_add(struct device *dev)
 {
-	struct device * parent;
-	int error;
+	struct device *parent = NULL;
+	int error = -EINVAL;
 
 	dev = get_device(dev);
 	if (!dev || !strlen(dev->bus_id))
-		return -EINVAL;
+		goto Error;
 
 	parent = get_device(dev->parent);