RDMA: Update workqueue usage
* ib_wq is added, which is used as the common workqueue for infiniband
instead of the system workqueue. All system workqueue usages
including flush_scheduled_work() callers are converted to use and
flush ib_wq.
* cancel_delayed_work() + flush_scheduled_work() converted to
cancel_delayed_work_sync().
* qib_wq is removed and ib_wq is used instead.
This is to prepare for deprecation of flush_scheduled_work().
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/qib/qib_init.c b/drivers/infiniband/hw/qib/qib_init.c
index 304bd80..ffefb78 100644
--- a/drivers/infiniband/hw/qib/qib_init.c
+++ b/drivers/infiniband/hw/qib/qib_init.c
@@ -80,7 +80,6 @@
module_param_named(wc_pat, qib_wc_pat, uint, S_IRUGO);
MODULE_PARM_DESC(wc_pat, "enable write-combining via PAT mechanism");
-struct workqueue_struct *qib_wq;
struct workqueue_struct *qib_cq_wq;
static void verify_interrupt(unsigned long);
@@ -1044,24 +1043,10 @@
if (ret)
goto bail;
- /*
- * We create our own workqueue mainly because we want to be
- * able to flush it when devices are being removed. We can't
- * use schedule_work()/flush_scheduled_work() because both
- * unregister_netdev() and linkwatch_event take the rtnl lock,
- * so flush_scheduled_work() can deadlock during device
- * removal.
- */
- qib_wq = create_workqueue("qib");
- if (!qib_wq) {
- ret = -ENOMEM;
- goto bail_dev;
- }
-
qib_cq_wq = create_singlethread_workqueue("qib_cq");
if (!qib_cq_wq) {
ret = -ENOMEM;
- goto bail_wq;
+ goto bail_dev;
}
/*
@@ -1091,8 +1076,6 @@
idr_destroy(&qib_unit_table);
bail_cq_wq:
destroy_workqueue(qib_cq_wq);
-bail_wq:
- destroy_workqueue(qib_wq);
bail_dev:
qib_dev_cleanup();
bail:
@@ -1116,7 +1099,6 @@
pci_unregister_driver(&qib_driver);
- destroy_workqueue(qib_wq);
destroy_workqueue(qib_cq_wq);
qib_cpulist_count = 0;
@@ -1289,7 +1271,7 @@
if (qib_mini_init || initfail || ret) {
qib_stop_timers(dd);
- flush_scheduled_work();
+ flush_workqueue(ib_wq);
for (pidx = 0; pidx < dd->num_pports; ++pidx)
dd->f_quiet_serdes(dd->pport + pidx);
if (qib_mini_init)
@@ -1338,8 +1320,8 @@
qib_stop_timers(dd);
- /* wait until all of our (qsfp) schedule_work() calls complete */
- flush_scheduled_work();
+ /* wait until all of our (qsfp) queue_work() calls complete */
+ flush_workqueue(ib_wq);
ret = qibfs_remove(dd);
if (ret)