diff options
| author | Michael S. Tsirkin <mst@mellanox.co.il> | 2006-08-03 22:16:06 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-09-22 15:17:18 -0700 |
| commit | 9217b27b12eb5ab910d14b3376c2b6cd13d87711 (patch) | |
| tree | 49d1f60e61013b7c60e13de0f60ec9ead81309b5 /drivers | |
| parent | 9fd558f454b666aca218a990d44f9e1ffac6ed4d (diff) | |
| download | blackbird-op-linux-9217b27b12eb5ab910d14b3376c2b6cd13d87711.tar.gz blackbird-op-linux-9217b27b12eb5ab910d14b3376c2b6cd13d87711.zip | |
IB/ipoib: Fix flush/start xmit race (from code review)
Prevent flush task from freeing the ipoib_neigh pointer, while
ipoib_start_xmit() is accessing the ipoib_neigh through the pointer it
has loaded from the skb's hardware address.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index cf71d2a5515c..36d76987a481 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -336,7 +336,8 @@ void ipoib_flush_paths(struct net_device *dev) struct ipoib_path *path, *tp; LIST_HEAD(remove_list); - spin_lock_irq(&priv->lock); + spin_lock_irq(&priv->tx_lock); + spin_lock(&priv->lock); list_splice(&priv->path_list, &remove_list); INIT_LIST_HEAD(&priv->path_list); @@ -347,12 +348,15 @@ void ipoib_flush_paths(struct net_device *dev) list_for_each_entry_safe(path, tp, &remove_list, list) { if (path->query) ib_sa_cancel_query(path->query_id, path->query); - spin_unlock_irq(&priv->lock); + spin_unlock(&priv->lock); + spin_unlock_irq(&priv->tx_lock); wait_for_completion(&path->done); path_free(dev, path); - spin_lock_irq(&priv->lock); + spin_lock_irq(&priv->tx_lock); + spin_lock(&priv->lock); } - spin_unlock_irq(&priv->lock); + spin_unlock(&priv->lock); + spin_unlock_irq(&priv->tx_lock); } static void path_rec_completion(int status, |
