!1226 [sync] PR-1221: media: rkvdec: fix use after free bug in rkvdec_remove

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/1221 
 
PR sync from: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/OUV33PGH22SGOMA622E2MXOQEGDVIIGV/ 
 
 
Link:https://gitee.com/openeuler/kernel/pulls/1226 

Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com> 
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> 

drivers/staging/media/rkvdec/rkvdec.c

@@ -1077,6 +1077,8 @@ static int rkvdec_remove(struct platform_device *pdev)
 {
 	struct rkvdec_dev *rkvdec = platform_get_drvdata(pdev);
 
+	cancel_delayed_work_sync(&rkvdec->watchdog_work);
+
 	rkvdec_v4l2_cleanup(rkvdec);
 	pm_runtime_disable(&pdev->dev);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);