[PATCH v2] kernel/kthread.c: kthread_worker: add work status check in timer_fn

[qiang.zhang]

From: Zqiang <qiang.zh...@windriver.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 "work->canceling" check current work status.

Signed-off-by: Zqiang <qiang.zh...@windriver.com>
---
 v1->v2:
 Change description information.

 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