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authorYevgeny Petrilin <yevgenyp@mellanox.co.il>2009-04-20 04:26:05 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-21 01:47:04 -0700
commit1e338db56e5a6a5bb93884c1fb3b0b9f01958f93 (patch)
treeae32849ed1d499aaaf06d2dcfb809e86a5095216
parent9a4f92a603cd72ee534cead20cbc627b34cfc884 (diff)
mlx4_en: Fix a race at restart task
The query whether the port is up or not should be done at the execution of the restart task and not when it is queued. Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/mlx4/en_netdev.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/net/mlx4/en_netdev.c b/drivers/net/mlx4/en_netdev.c
index 303c23de6ca..09fb7cf9f48 100644
--- a/drivers/net/mlx4/en_netdev.c
+++ b/drivers/net/mlx4/en_netdev.c
@@ -348,11 +348,9 @@ static void mlx4_en_tx_timeout(struct net_device *dev)
if (netif_msg_timer(priv))
mlx4_warn(mdev, "Tx timeout called on port:%d\n", priv->port);
- if (netif_carrier_ok(dev)) {
- priv->port_stats.tx_timeout++;
- mlx4_dbg(DRV, priv, "Scheduling watchdog\n");
- queue_work(mdev->workqueue, &priv->watchdog_task);
- }
+ priv->port_stats.tx_timeout++;
+ mlx4_dbg(DRV, priv, "Scheduling watchdog\n");
+ queue_work(mdev->workqueue, &priv->watchdog_task);
}
@@ -761,9 +759,14 @@ static void mlx4_en_restart(struct work_struct *work)
struct net_device *dev = priv->dev;
mlx4_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
- mlx4_en_stop_port(dev);
- if (mlx4_en_start_port(dev))
- mlx4_err(mdev, "Failed restarting port %d\n", priv->port);
+
+ mutex_lock(&mdev->state_lock);
+ if (priv->port_up) {
+ mlx4_en_stop_port(dev);
+ if (mlx4_en_start_port(dev))
+ mlx4_err(mdev, "Failed restarting port %d\n", priv->port);
+ }
+ mutex_unlock(&mdev->state_lock);
}