From 0b3ea0829cbcdaee6e018a83a2949ef458213f3b Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Mon, 20 Mar 2006 10:08:24 -0800 Subject: [PATCH] IPoIB: Move ipoib_ib_dev_flush() to ipoib workqueue Move ipoib_ib_dev_flush() to ipoib's workqueue. This keeps it ordered with respect to other work scheduled by the ipoib driver. This fixes problems with races, for example: - ipoib_ib_dev_flush() has started running because of an IB event - user does ifconfig ib0 down - ipoib_mcast_stop_thread() gets called twice and waits for the same completion twice Signed-off-by: Jack Morgenstein Signed-off-by: Michael S. Tsirkin Signed-off-by: Roland Dreier --- drivers/infiniband/ulp/ipoib/ipoib.h | 2 +- drivers/infiniband/ulp/ipoib/ipoib_ib.c | 9 +++++---- drivers/infiniband/ulp/ipoib/ipoib_main.c | 8 +++++++- drivers/infiniband/ulp/ipoib/ipoib_verbs.c | 2 +- 4 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h index 638eff745b2f..1251f86ec856 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib.h +++ b/drivers/infiniband/ulp/ipoib/ipoib.h @@ -259,7 +259,7 @@ void ipoib_ib_dev_cleanup(struct net_device *dev); int ipoib_ib_dev_open(struct net_device *dev); int ipoib_ib_dev_up(struct net_device *dev); -int ipoib_ib_dev_down(struct net_device *dev); +int ipoib_ib_dev_down(struct net_device *dev, int flush); int ipoib_ib_dev_stop(struct net_device *dev); int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port); diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c index 5a5367d10875..a1f5a05f2f36 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c @@ -435,7 +435,7 @@ int ipoib_ib_dev_up(struct net_device *dev) return ipoib_mcast_start_thread(dev); } -int ipoib_ib_dev_down(struct net_device *dev) +int ipoib_ib_dev_down(struct net_device *dev, int flush) { struct ipoib_dev_priv *priv = netdev_priv(dev); @@ -450,10 +450,11 @@ int ipoib_ib_dev_down(struct net_device *dev) set_bit(IPOIB_PKEY_STOP, &priv->flags); cancel_delayed_work(&priv->pkey_task); mutex_unlock(&pkey_mutex); - flush_workqueue(ipoib_workqueue); + if (flush) + flush_workqueue(ipoib_workqueue); } - ipoib_mcast_stop_thread(dev, 1); + ipoib_mcast_stop_thread(dev, flush); ipoib_mcast_dev_flush(dev); ipoib_flush_paths(dev); @@ -591,7 +592,7 @@ void ipoib_ib_dev_flush(void *_dev) ipoib_dbg(priv, "flushing\n"); - ipoib_ib_dev_down(dev); + ipoib_ib_dev_down(dev, 0); /* * The device could have been brought down between the start and when diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index c3b5f79d1168..1633aadae421 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -133,7 +133,13 @@ static int ipoib_stop(struct net_device *dev) netif_stop_queue(dev); - ipoib_ib_dev_down(dev); + /* + * Now flush workqueue to make sure a scheduled task doesn't + * bring our internal state back up. + */ + flush_workqueue(ipoib_workqueue); + + ipoib_ib_dev_down(dev, 1); ipoib_ib_dev_stop(dev); if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { diff --git a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c index faaf10e5fc7b..18d2f53ec34c 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c @@ -255,6 +255,6 @@ void ipoib_event(struct ib_event_handler *handler, record->event == IB_EVENT_LID_CHANGE || record->event == IB_EVENT_SM_CHANGE) { ipoib_dbg(priv, "Port active event\n"); - schedule_work(&priv->flush_task); + queue_work(ipoib_workqueue, &priv->flush_task); } } -- 2.30.2