!6883 Bluetooth: Fix TOCTOU in HCI debugfs implementation

Merge Pull Request from: @ci-robot 
 
PR sync from: Wang Hai <wanghai38@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/PQHSQOCXT3POE7GBJJ4HA2FO2CUXXMXQ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I917NR 
 
Link:https://gitee.com/openeuler/kernel/pulls/6883

 

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