diff options
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_main.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 98c738d..4be80be 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -839,7 +839,7 @@ static void ipoib_set_mcast_list(struct net_device *dev) return; } - queue_work(ipoib_workqueue, &priv->restart_task); + queue_work(priv->wq, &priv->restart_task); } static int ipoib_get_iflink(const struct net_device *dev) @@ -961,7 +961,7 @@ static void ipoib_reap_neigh(struct work_struct *work) __ipoib_reap_neigh(priv); if (!test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags)) - queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task, + queue_delayed_work(priv->wq, &priv->neigh_reap_task, arp_tbl.gc_interval); } @@ -1140,7 +1140,7 @@ static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) /* start garbage collection */ clear_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); - queue_delayed_work(ipoib_workqueue, &priv->neigh_reap_task, + queue_delayed_work(priv->wq, &priv->neigh_reap_task, arp_tbl.gc_interval); return 0; @@ -1651,10 +1651,11 @@ sysfs_failed: register_failed: ib_unregister_event_handler(&priv->event_handler); + flush_workqueue(ipoib_workqueue); /* Stop GC if started before flush */ set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); cancel_delayed_work(&priv->neigh_reap_task); - flush_workqueue(ipoib_workqueue); + flush_workqueue(priv->wq); event_failed: ipoib_dev_cleanup(priv->dev); @@ -1717,6 +1718,7 @@ static void ipoib_remove_one(struct ib_device *device) list_for_each_entry_safe(priv, tmp, dev_list, list) { ib_unregister_event_handler(&priv->event_handler); + flush_workqueue(ipoib_workqueue); rtnl_lock(); dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); @@ -1725,7 +1727,7 @@ static void ipoib_remove_one(struct ib_device *device) /* Stop GC */ set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags); cancel_delayed_work(&priv->neigh_reap_task); - flush_workqueue(ipoib_workqueue); + flush_workqueue(priv->wq); unregister_netdev(priv->dev); free_netdev(priv->dev); @@ -1760,14 +1762,16 @@ static int __init ipoib_init_module(void) return ret; /* - * 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. + * We create a global workqueue here that is used for all flush + * operations. However, if you attempt to flush a workqueue + * from a task on that same workqueue, it deadlocks the system. + * We want to be able to flush the tasks associated with a + * specific net device, so we also create a workqueue for each + * netdevice. We queue up the tasks for that device only on + * its private workqueue, and we only queue up flush events + * on our global flush workqueue. This avoids the deadlocks. */ - ipoib_workqueue = create_singlethread_workqueue("ipoib"); + ipoib_workqueue = create_singlethread_workqueue("ipoib_flush"); if (!ipoib_workqueue) { ret = -ENOMEM; goto err_fs; |