[openib-general] [PATCH report] IB/ipoib fix flush/start xmit race (from code review)
Michael S. Tsirkin
mst at mellanox.co.il
Thu Aug 3 12:16:06 PDT 2006
Seems to work fine here. Pls consider for 2.6.18.
---
Prevent flush task from freeing the ipoib_neigh pointer,
while ipoib_start_xmit is accessing the ipoib_neigh through
the pointer is has loaded from the hardware address.
Signed-off-by: Michael S. Tsirkin <mst at mellanox.co.il>
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index cf71d2a..31c4b05 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
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);
@@ -352,7 +353,8 @@ void ipoib_flush_paths(struct net_device
path_free(dev, path);
spin_lock_irq(&priv->lock);
}
- spin_unlock_irq(&priv->lock);
+ spin_unlock(&priv->lock);
+ spin_unlock_irq(&priv->tx_lock);
}
static void path_rec_completion(int status,
--
MST
More information about the general
mailing list