!5558 net: fujitsu: fix potential null-ptr-deref

Merge Pull Request from: @ci-robot 
 
PR sync from: Peng Zhang <zhangpeng362@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/4DPT3XD2PT7AIOPBSCRUINCNOEHQOMB3/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9BGKK 
 
Link:https://gitee.com/openeuler/kernel/pulls/5558

 

Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>