diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 96fe2f9..ab53832 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -180,7 +180,9 @@
 		up(&dev->sem);
 		put_device(dev);
 	}
-	return err;
+	if (err)
+		return err;
+	return count;
 }
 static DRIVER_ATTR(bind, S_IWUSR, NULL, driver_bind);