Re: [PATCH net 2/2] net/mlx5: Start health poll after enable hca

[Michal Swiatkowski <michal.swiatkowski@linux.intel.com>]

On Tue, Mar 18, 2025 at 10:51:17PM +0200, Tariq Toukan wrote:
> From: Moshe Shemesh <moshe@nvidia.com>
> 
> The health poll mechanism performs periodic checks to detect firmware
> errors. One of the checks verifies the function is still enabled on
> firmware side, but the function is enabled only after enable_hca command
> completed. Start health poll after enable_hca command to avoid a race
> between function enabled and first health polling.
> 
> Fixes: 9b98d395b85d ("net/mlx5: Start health poll at earlier stage of driver load")
> Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
> Reviewed-by: Shay Drori <shayd@nvidia.com>
> Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/main.c | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
> index ec956c4bcebd..7c3312d6aed9 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
> @@ -1205,24 +1205,24 @@ static int mlx5_function_enable(struct mlx5_core_dev *dev, bool boot, u64 timeou
>  	dev->caps.embedded_cpu = mlx5_read_embedded_cpu(dev);
>  	mlx5_cmd_set_state(dev, MLX5_CMDIF_STATE_UP);
>  
> -	mlx5_start_health_poll(dev);
> -
>  	err = mlx5_core_enable_hca(dev, 0);
>  	if (err) {
>  		mlx5_core_err(dev, "enable hca failed\n");
> -		goto stop_health_poll;
> +		goto err_cmd_cleanup;
>  	}
>  
> +	mlx5_start_health_poll(dev);
> +
>  	err = mlx5_core_set_issi(dev);
>  	if (err) {
>  		mlx5_core_err(dev, "failed to set issi\n");
> -		goto err_disable_hca;
> +		goto stop_health_poll;
>  	}
>  
>  	err = mlx5_satisfy_startup_pages(dev, 1);
>  	if (err) {
>  		mlx5_core_err(dev, "failed to allocate boot pages\n");
> -		goto err_disable_hca;
> +		goto stop_health_poll;
>  	}
>  
>  	err = mlx5_tout_query_dtor(dev);
> @@ -1235,10 +1235,9 @@ static int mlx5_function_enable(struct mlx5_core_dev *dev, bool boot, u64 timeou
>  
>  reclaim_boot_pages:
>  	mlx5_reclaim_startup_pages(dev);
> -err_disable_hca:
> -	mlx5_core_disable_hca(dev, 0);
>  stop_health_poll:
>  	mlx5_stop_health_poll(dev, boot);
> +	mlx5_core_disable_hca(dev, 0);
>  err_cmd_cleanup:
>  	mlx5_cmd_set_state(dev, MLX5_CMDIF_STATE_DOWN);
>  	mlx5_cmd_disable(dev);
> @@ -1249,8 +1248,8 @@ static int mlx5_function_enable(struct mlx5_core_dev *dev, bool boot, u64 timeou
>  static void mlx5_function_disable(struct mlx5_core_dev *dev, bool boot)
>  {
>  	mlx5_reclaim_startup_pages(dev);
> -	mlx5_core_disable_hca(dev, 0);
>  	mlx5_stop_health_poll(dev, boot);
> +	mlx5_core_disable_hca(dev, 0);
>  	mlx5_cmd_set_state(dev, MLX5_CMDIF_STATE_DOWN);
>  	mlx5_cmd_disable(dev);
>  }

Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>

> -- 
> 2.31.1