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Date: Fri, 25 Sep 2020 13:01:14 +0800 From: <qiang.zhang@...driver.com> To: <tj@...nel.org>, <pmladek@...e.com> CC: <akpm@...ux-foundation.org>, <linux-kernel@...r.kernel.org> Subject: [PATCH] kernel/kthread.c: kthread_worker: add work status check in timer_fn From: Zqiang <qiang.zhang@...driver.com> When queue delayed work to worker, at some point after that the timer_fn will be call, add work to worker's work_list, at this time, the work may be cancel, so add "queuing_blocked" check current work status. Signed-off-by: Zqiang <qiang.zhang@...driver.com> --- kernel/kthread.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/kthread.c b/kernel/kthread.c index 3edaa380dc7b..85a2c9b32049 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -897,7 +897,8 @@ void kthread_delayed_work_timer_fn(struct timer_list *t) /* Move the work from worker->delayed_work_list. */ WARN_ON_ONCE(list_empty(&work->node)); list_del_init(&work->node); - kthread_insert_work(worker, work, &worker->work_list); + if (!work->canceling) + kthread_insert_work(worker, work, &worker->work_list); raw_spin_unlock_irqrestore(&worker->lock, flags); } -- 2.17.1
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