!5245 ceph: fix deadlock or deadcode of misusing dget()

Merge Pull Request from: @ci-robot 
 
PR sync from: Yifan Qiao <qiaoyifan4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/RLZVS3OAZCSN2YCIAJ5C637LGD5APVTQ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I96G92 
 
Link:https://gitee.com/openeuler/kernel/pulls/5245

 

Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>