diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2022-04-20 07:18:57 +0900 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-04-25 16:04:53 -0300 |
| commit | ff815a89398d8bbfdc14ced98252bdae92126225 (patch) | |
| tree | 5d8eb3280b1eae4e004118c1ebb1db5daf4c0b67 /drivers/infiniband | |
| parent | 0f328c70341f9891c8893e13fc47fec6c4c1e606 (diff) | |
RDMA/core: Avoid flush_workqueue(system_unbound_wq) usage
Flushing system-wide workqueues is dangerous and will be forbidden.
Replace system_unbound_wq with local ib_unreg_wq.
Link: https://lore.kernel.org/r/252cefb0-a400-83f6-2032-333d69f52c1b@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/device.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index 4deb60a3b43f..d275db195f1a 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -58,6 +58,7 @@ struct workqueue_struct *ib_comp_wq; struct workqueue_struct *ib_comp_unbound_wq; struct workqueue_struct *ib_wq; EXPORT_SYMBOL_GPL(ib_wq); +static struct workqueue_struct *ib_unreg_wq; /* * Each of the three rwsem locks (devices, clients, client_data) protects the @@ -1602,7 +1603,7 @@ void ib_unregister_device_queued(struct ib_device *ib_dev) WARN_ON(!refcount_read(&ib_dev->refcount)); WARN_ON(!ib_dev->ops.dealloc_driver); get_device(&ib_dev->dev); - if (!queue_work(system_unbound_wq, &ib_dev->unregistration_work)) + if (!queue_work(ib_unreg_wq, &ib_dev->unregistration_work)) put_device(&ib_dev->dev); } EXPORT_SYMBOL(ib_unregister_device_queued); @@ -2751,27 +2752,28 @@ static const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = { static int __init ib_core_init(void) { - int ret; + int ret = -ENOMEM; ib_wq = alloc_workqueue("infiniband", 0, 0); if (!ib_wq) return -ENOMEM; + ib_unreg_wq = alloc_workqueue("ib-unreg-wq", WQ_UNBOUND, + WQ_UNBOUND_MAX_ACTIVE); + if (!ib_unreg_wq) + goto err; + ib_comp_wq = alloc_workqueue("ib-comp-wq", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0); - if (!ib_comp_wq) { - ret = -ENOMEM; - goto err; - } + if (!ib_comp_wq) + goto err_unbound; ib_comp_unbound_wq = alloc_workqueue("ib-comp-unb-wq", WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE); - if (!ib_comp_unbound_wq) { - ret = -ENOMEM; + if (!ib_comp_unbound_wq) goto err_comp; - } ret = class_register(&ib_class); if (ret) { @@ -2831,6 +2833,8 @@ err_comp_unbound: destroy_workqueue(ib_comp_unbound_wq); err_comp: destroy_workqueue(ib_comp_wq); +err_unbound: + destroy_workqueue(ib_unreg_wq); err: destroy_workqueue(ib_wq); return ret; @@ -2852,7 +2856,7 @@ static void __exit ib_core_cleanup(void) destroy_workqueue(ib_comp_wq); /* Make sure that any pending umem accounting work is done. */ destroy_workqueue(ib_wq); - flush_workqueue(system_unbound_wq); + destroy_workqueue(ib_unreg_wq); WARN_ON(!xa_empty(&clients)); WARN_ON(!xa_empty(&devices)); } |