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Commit 90683061 authored by Eugenia Emantayev's avatar Eugenia Emantayev Committed by David S. Miller
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net/mlx4_en: Fix HW timestamp init issue upon system startup 



mlx4_en_init_timestamp was called before creation of netdev and port
init, thus used uninitialized values.  Specifically - NIC frequency was
incorrect causing wrong calculations and later wrong HW timestamps.

Fixes: 1ec4864b ('net/mlx4_en: Fixed crash when port type is changed')
Signed-off-by: default avatarEugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: default avatarMarina Varshaver <marinav@mellanox.com>
Signed-off-by: default avatarEran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fc9f5ea9

drivers/net/ethernet/mellanox/mlx4/en_clock.c

+7 −0
Original line number Diff line number Diff line
@@ -242,6 +242,13 @@ void mlx4_en_init_timestamp(struct mlx4_en_dev *mdev) 
	unsigned long flags;

	u64 ns, zero = 0;



	/* mlx4_en_init_timestamp is called for each netdev.

	 * mdev->ptp_clock is common for all ports, skip initialization if

	 * was done for other port.

	 */

	if (mdev->ptp_clock)

		return;



	rwlock_init(&mdev->clock_lock);



	memset(&mdev->cycles, 0, sizeof(mdev->cycles));

drivers/net/ethernet/mellanox/mlx4/en_main.c

+0 −7
Original line number Diff line number Diff line
@@ -232,9 +232,6 @@ static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 
		if (mdev->pndev[i])

			mlx4_en_destroy_netdev(mdev->pndev[i]);



	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)

		mlx4_en_remove_timestamp(mdev);



	flush_workqueue(mdev->workqueue);

	destroy_workqueue(mdev->workqueue);

	(void) mlx4_mr_free(dev, &mdev->mr);
@@ -320,10 +317,6 @@ static void *mlx4_en_add(struct mlx4_dev *dev) 
	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)

		mdev->port_cnt++;



	/* Initialize time stamp mechanism */

	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)

		mlx4_en_init_timestamp(mdev);



	/* Set default number of RX rings*/

	mlx4_en_set_num_rx_rings(mdev);

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

+7 −0
Original line number Diff line number Diff line
@@ -2072,6 +2072,9 @@ void mlx4_en_destroy_netdev(struct net_device *dev) 
	/* flush any pending task for this netdev */

	flush_workqueue(mdev->workqueue);



	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)

		mlx4_en_remove_timestamp(mdev);



	/* Detach the netdev so tasks would not attempt to access it */

	mutex_lock(&mdev->state_lock);

	mdev->pndev[priv->port] = NULL;
@@ -3058,6 +3061,10 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port, 
	}

	queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);



	/* Initialize time stamp mechanism */

	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)

		mlx4_en_init_timestamp(mdev);



	queue_delayed_work(mdev->workqueue, &priv->service_task,

			   SERVICE_TASK_DELAY);