net/mlx5: fix deadlock of link status alarm

[dpdk.git] / drivers / net / mlx5 / mlx5_ethdev.c

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 79a0248..6f78adc 100644 (file)
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1187,8 +1187,12 @@ mlx5_dev_link_status_handler(void *arg)
        struct priv *priv = dev->data->dev_private;
        int ret;
 
-       priv_lock(priv);
-       assert(priv->pending_alarm == 1);
+       while (!priv_trylock(priv)) {
+               /* Alarm is being canceled. */
+               if (priv->pending_alarm == 0)
+                       return;
+               rte_pause();
+       }
        priv->pending_alarm = 0;
        ret = priv_link_status_update(priv);
        priv_unlock(priv);
@@ -1255,9 +1259,10 @@ priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
        if (priv->primary_socket)
                rte_intr_callback_unregister(&priv->intr_handle_socket,
                                             mlx5_dev_handler_socket, dev);
-       if (priv->pending_alarm)
+       if (priv->pending_alarm) {
+               priv->pending_alarm = 0;
                rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
-       priv->pending_alarm = 0;
+       }
        priv->intr_handle.fd = 0;
        priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
        priv->intr_handle_socket.fd = 0;