of: Fix a refcounting bug in __of_attach_node_sysfs()

The problem in this code is that if kobject_add() fails, then it should
call of_node_put(np) to drop the reference count.  I've actually moved
the of_node_get(np) later in the function to avoid needing to do clean
up.

Fixes: 5b2c2f5a0ea3 ("of: overlay: add missing of_node_get() in __of_attach_node_sysfs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c
index c72eef9..a32e60b 100644 (file)
--- a/drivers/of/kobj.c
+++ b/drivers/of/kobj.c
@@ -134,8 +134,6 @@ int __of_attach_node_sysfs(struct device_node *np)
        if (!name)
                return -ENOMEM;
 
-       of_node_get(np);
-
        rc = kobject_add(&np->kobj, parent, "%s", name);
        kfree(name);
        if (rc)
@@ -144,6 +142,7 @@ int __of_attach_node_sysfs(struct device_node *np)
        for_each_property_of_node(np, pp)
                __of_add_property_sysfs(np, pp);
 
+       of_node_get(np);
        return 0;
 }