Driver core: Fix cleanup in device_create_vargs().

If device_register() in device_create_vargs() fails, the device
must be cleaned up with put_device() (which is also fine on NULL)
instead of kfree().

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/core.c

@@ -1256,7 +1256,7 @@ struct device *device_create_vargs(struct class *class, struct device *parent,
 	return dev;
 
 error:
-	kfree(dev);
+	put_device(dev);
 	return ERR_PTR(retval);
 }
 EXPORT_SYMBOL_GPL(device_create_vargs);