workqueue: fix bugs in wq_update_unbound_numa() failure path
wq_update_unbound_numa() failure path has the following two bugs. - alloc_unbound_pwq() is called without holding wq->mutex; however, if the allocation fails, it jumps to out_unlock which tries to unlock wq->mutex. - The function should switch to dfl_pwq on failure but didn't do so after alloc_unbound_pwq() failure. Fix it by regrabbing wq->mutex and jumping to use_dfl_pwq on alloc_unbound_pwq() failure. Signed-off-by:Daeseok Youn <daeseok.youn@gmail.com> Acked-by:
Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org Fixes: 4c16bd32 ("workqueue: implement NUMA affinity for unbound workqueues")
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c9eaa447
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