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IPoIB: Move ipoib_ib_dev_flush() to ipoib workqueue

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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 <jackm@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Jack Morgenstein 2006-03-20 10:08:24 -08:00 committed by Roland Dreier
parent 8b9ab02b69
commit 0b3ea0829c
4 changed files with 14 additions and 7 deletions
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2
drivers/infiniband/ulp/ipoib/ipoib.h
View File

@ -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);

9
drivers/infiniband/ulp/ipoib/ipoib_ib.c
View File

@ -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

8
drivers/infiniband/ulp/ipoib/ipoib_main.c
View File

@ -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)) {

2
drivers/infiniband/ulp/ipoib/ipoib_verbs.c
View File

@ -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);
}
}