linux-kernel - [PATCH 4.4 18/38] workqueue: Move the position of debug_work_activate() in __queue

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Date:   Thu, 15 Apr 2021 16:47:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zqiang <qiang.zhang@...driver.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Tejun Heo <tj@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 18/38] workqueue: Move the position of debug_work_activate() in __queue_work()

From: Zqiang <qiang.zhang@...driver.com>

[ Upstream commit 0687c66b5f666b5ad433f4e94251590d9bc9d10e ]

The debug_work_activate() is called on the premise that
the work can be inserted, because if wq be in WQ_DRAINING
status, insert work may be failed.

Fixes: e41e704bc4f4 ("workqueue: improve destroy_workqueue() debuggability")
Signed-off-by: Zqiang <qiang.zhang@...driver.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@...il.com>
Signed-off-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 kernel/workqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 6b293804cd73..a2de597604e6 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1351,7 +1351,6 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 	 */
 	WARN_ON_ONCE(!irqs_disabled());
 
-	debug_work_activate(work);
 
 	/* if draining, only works from the same workqueue are allowed */
 	if (unlikely(wq->flags & __WQ_DRAINING) &&
@@ -1430,6 +1429,7 @@ retry:
 		worklist = &pwq->delayed_works;
 	}
 
+	debug_work_activate(work);
 	insert_work(pwq, work, worklist, work_flags);
 
 	spin_unlock(&pwq->pool->lock);
-- 
2.30.2