!9786 drm/exynos: fix a possible null-pointer dereference due to data race in...

!9786  drm/exynos: fix a possible null-pointer dereference due to data race in exynos_drm_crtc_atomic_disable()

Merge Pull Request from: @ci-robot 
 
PR sync from: Hui Tang <tanghui20@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/MQPY67CO3ND2VA4ZXWVY27UWN6TD64F3/ 
 
https://gitee.com/src-openeuler/kernel/issues/I917IV 
 
Link:https://gitee.com/openeuler/kernel/pulls/9786

 

Reviewed-by: Zucheng Zheng <zhengzucheng@huawei.com>
Reviewed-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>