driver core: sysdev: do not send KOBJ_ADD uevent if kobject_init_and_add fails

If kobject_init_and_add fails, sysdev_register should not send KOBJ_ADD
uevent to userspace.

Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 79a9ae5..0d90390 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -275,9 +275,9 @@
 				drv->add(sysdev);
 		}
 		mutex_unlock(&sysdev_drivers_lock);
+		kobject_uevent(&sysdev->kobj, KOBJ_ADD);
 	}
 
-	kobject_uevent(&sysdev->kobj, KOBJ_ADD);
 	return error;
 }