!10198 scsi: qedi: Fix crash while reading debugfs attribute

Merge Pull Request from: @ci-robot 
 
PR sync from: Wenyu Huang <huangwenyu5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/5MOKDZHQNOPMK5PAXJF6B5KTZ36YCAWX/ 
 
https://gitee.com/src-openeuler/kernel/issues/IACQZS 
 
Link:https://gitee.com/openeuler/kernel/pulls/10198

 

Reviewed-by: Zucheng Zheng <zhengzucheng@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>