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>
diff --git a/drivers/net/mlx4/en_netdev.c b/drivers/net/mlx4/en_netdev.c
index 303c23d..09fb7cf 100644
--- a/drivers/net/mlx4/en_netdev.c
+++ b/drivers/net/mlx4/en_netdev.c
@@ -348,11 +348,9 @@
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 @@
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);
}