list_to_kobj
kobject_put(list_to_kobj(el));
amdgpu_discovery_sysfs_ip_hw_free(to_ip_hw_id(list_to_kobj(el)));
amdgpu_discovery_sysfs_die_free(to_ip_die_entry(list_to_kobj(el)));
ip_die_entry = to_ip_die_entry(list_to_kobj(el_die));
hw_id = to_ip_hw_id(list_to_kobj(el_hw_id));
ip_inst = to_ip_hw_instance(list_to_kobj(el_hw_inst));