[PATCH 3/3] workqueue: add a check point in pwq_activate_delayed_work()

From: Michael Wang
Date: Wed Jun 05 2013 - 03:11:47 EST

get_work_pwq() is possible to return NULL, add a check point for that in
the context inside pwq_activate_delayed_work().

CC: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Michael Wang <wangyun@xxxxxxxxxxxxxxxxxx>
kernel/workqueue.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ee8e29a..ea2ec38 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1072,6 +1072,7 @@ static void put_pwq_unlocked(struct pool_workqueue *pwq)
static void pwq_activate_delayed_work(struct work_struct *work)
struct pool_workqueue *pwq = get_work_pwq(work);
+ BUG_ON(!pwq);

move_linked_works(work, &pwq->pool->worklist, NULL);

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