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| author | Hannes Reinecke <hare@suse.de> | 2019-05-03 11:43:52 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-05-13 16:00:03 +0200 |
| commit | 8730c1ddb69bdeeb10c1f613a4e15e95862b1981 (patch) | |
| tree | dd56d3a328624814e8cc15403ba11ee0a03ae9cc | |
| parent | nvme-rdma: remove redundant reference between ib_device and tagset (diff) | |
| download | linux-8730c1ddb69bdeeb10c1f613a4e15e95862b1981.tar.xz linux-8730c1ddb69bdeeb10c1f613a4e15e95862b1981.zip | |
nvme-fc: use separate work queue to avoid warning
When tearing down a controller the following warning is issued:
WARNING: CPU: 0 PID: 30681 at ../kernel/workqueue.c:2418 check_flush_dependency
This happens as the err_work workqueue item is scheduled on the
system workqueue (which has WQ_MEM_RECLAIM not set), but is flushed
from a workqueue which has WQ_MEM_RECLAIM set.
Fix this by providing an FC-NVMe specific workqueue.
Fixes: 4cff280a5fcc ("nvme-fc: resolve io failures during connect")
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/nvme/host/fc.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index 6d8451356eac..c17c887f2148 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -202,7 +202,7 @@ static LIST_HEAD(nvme_fc_lport_list); static DEFINE_IDA(nvme_fc_local_port_cnt); static DEFINE_IDA(nvme_fc_ctrl_cnt); - +static struct workqueue_struct *nvme_fc_wq; /* * These items are short-term. They will eventually be moved into @@ -2054,7 +2054,7 @@ nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) */ if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) { active = atomic_xchg(&ctrl->err_work_active, 1); - if (!active && !schedule_work(&ctrl->err_work)) { + if (!active && !queue_work(nvme_fc_wq, &ctrl->err_work)) { atomic_set(&ctrl->err_work_active, 0); WARN_ON(1); } @@ -3399,6 +3399,10 @@ static int __init nvme_fc_init_module(void) { int ret; + nvme_fc_wq = alloc_workqueue("nvme_fc_wq", WQ_MEM_RECLAIM, 0); + if (!nvme_fc_wq) + return -ENOMEM; + /* * NOTE: * It is expected that in the future the kernel will combine @@ -3416,7 +3420,7 @@ static int __init nvme_fc_init_module(void) ret = class_register(&fc_class); if (ret) { pr_err("couldn't register class fc\n"); - return ret; + goto out_destroy_wq; } /* @@ -3440,6 +3444,9 @@ out_destroy_device: device_destroy(&fc_class, MKDEV(0, 0)); out_destroy_class: class_unregister(&fc_class); +out_destroy_wq: + destroy_workqueue(nvme_fc_wq); + return ret; } @@ -3456,6 +3463,7 @@ static void __exit nvme_fc_exit_module(void) device_destroy(&fc_class, MKDEV(0, 0)); class_unregister(&fc_class); + destroy_workqueue(nvme_fc_wq); } module_init(nvme_fc_init_module); |