[PATCH v1] kobject: Restore old behaviour of kobject_del(NULL)

[Andy Shevchenko]

The commit 079ad2fb4bf9 ("kobject: Avoid premature parent object freeing in
kobject_cleanup()") inadvertently dropped a possibility to call kobject_del()
with NULL pointer. Restore the old behaviour.

Fixes: 079ad2fb4bf9 ("kobject: Avoid premature parent object freeing in kobject_cleanup()")
Reported-by: Qu Wenruo <quwenruo.btrfs@xxxxxxx>
Cc: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 lib/kobject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index 3afb939f2a1c..f5f5273031d2 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -637,7 +637,7 @@ static void __kobject_del(struct kobject *kobj)
  */
 void kobject_del(struct kobject *kobj)
 {
-	struct kobject *parent = kobj->parent;
+	struct kobject *parent = kobj ? kobj->parent : NULL;
 
 	__kobject_del(kobj);
 	kobject_put(parent);
-- 
2.27.0