!8064 isdn: mISDN: netjet: Fix crash in nj_probe:

Merge Pull Request from: @ci-robot 
 
PR sync from: Luo Gengkun <luogengkun2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FCVTZWJRXTQSG4RXEEKEVMU5LJ2IU5AT/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9R4K2 
 
Link:https://gitee.com/openeuler/kernel/pulls/8064

 

Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>