diff options
| author | Eli Cohen <eli@mellanox.co.il> | 2006-04-05 14:59:40 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-04-10 09:43:58 -0700 |
| commit | f2de3b06126ddb07d0e4617225d74dce0855add3 (patch) | |
| tree | 21a62b2115804688d700c01ed2ede87413b5d9d1 /drivers/infiniband | |
| parent | bf6a9e31cfa768ce0a8e18474b3ca808641d9243 (diff) | |
IPoIB: Wait for join to finish before freeing mcast struct
ipoib_mcast_restart_task() might free an mcast object while a join
request is still outstanding, leading to an oops when the query
completes. Fix this by waiting for query to complete, similar to what
ipoib_stop_thread() is doing. The wait for mcast completion code is
consolidated in wait_for_mcast_join().
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index 07b9826b5193..1dae4b238252 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -609,6 +609,22 @@ int ipoib_mcast_start_thread(struct net_device *dev) return 0; } +static void wait_for_mcast_join(struct ipoib_dev_priv *priv, + struct ipoib_mcast *mcast) +{ + spin_lock_irq(&priv->lock); + if (mcast && mcast->query) { + ib_sa_cancel_query(mcast->query_id, mcast->query); + mcast->query = NULL; + spin_unlock_irq(&priv->lock); + ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", + IPOIB_GID_ARG(mcast->mcmember.mgid)); + wait_for_completion(&mcast->done); + } + else + spin_unlock_irq(&priv->lock); +} + int ipoib_mcast_stop_thread(struct net_device *dev, int flush) { struct ipoib_dev_priv *priv = netdev_priv(dev); @@ -628,28 +644,10 @@ int ipoib_mcast_stop_thread(struct net_device *dev, int flush) if (flush) flush_workqueue(ipoib_workqueue); - spin_lock_irq(&priv->lock); - if (priv->broadcast && priv->broadcast->query) { - ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query); - priv->broadcast->query = NULL; - spin_unlock_irq(&priv->lock); - ipoib_dbg_mcast(priv, "waiting for bcast\n"); - wait_for_completion(&priv->broadcast->done); - } else - spin_unlock_irq(&priv->lock); + wait_for_mcast_join(priv, priv->broadcast); - list_for_each_entry(mcast, &priv->multicast_list, list) { - spin_lock_irq(&priv->lock); - if (mcast->query) { - ib_sa_cancel_query(mcast->query_id, mcast->query); - mcast->query = NULL; - spin_unlock_irq(&priv->lock); - ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", - IPOIB_GID_ARG(mcast->mcmember.mgid)); - wait_for_completion(&mcast->done); - } else - spin_unlock_irq(&priv->lock); - } + list_for_each_entry(mcast, &priv->multicast_list, list) + wait_for_mcast_join(priv, mcast); return 0; } @@ -902,6 +900,7 @@ void ipoib_mcast_restart_task(void *dev_ptr) /* We have to cancel outside of the spinlock */ list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { + wait_for_mcast_join(priv, mcast); ipoib_mcast_leave(mcast->dev, mcast); ipoib_mcast_free(mcast); } |