workqueue: correct handling of the pool spin_lock
When we fail to mutex_trylock(), we release the pool spin_lock and do
mutex_lock(). After that, we should regrab the pool spin_lock, but,
regrabbing is missed in current code. So correct it.
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 1ae6028..286847b 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2059,6 +2059,7 @@
if (unlikely(!mutex_trylock(&pool->manager_mutex))) {
spin_unlock_irq(&pool->lock);
mutex_lock(&pool->manager_mutex);
+ spin_lock_irq(&pool->lock);
ret = true;
}