!4411 v2 drm/atomic: Fix potential use-after-free in nonblocking commits

Merge Pull Request from: @ci-robot 
 
PR sync from: Guo Mengqi <guomengqi3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/4OPQGMANJJWNNMGA2VWRNIDSYJ24VT5Q/ 
 
https://gitee.com/src-openeuler/kernel/issues/I8YD5O 
 
Link:https://gitee.com/openeuler/kernel/pulls/4411

 

Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>