!9497 netrom: fix possible dead-lock in nr_rt_ioctl()

Merge Pull Request from: @ci-robot 
 
PR sync from: Pu Lehui <pulehui@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FOMLVNUGK54GDO5EJ4D3A7HK7EMFARTE/ 
 
https://gitee.com/src-openeuler/kernel/issues/IA6SHC 
 
Link:https://gitee.com/openeuler/kernel/pulls/9497

 

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