net/mlx5e: Use READ_ONCE/WRITE_ONCE for DCBX trust state

[sfrench/cifs-2.6.git] / drivers / net / ethernet / mellanox / mlx5 / core / en_dcbnl.c

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index a4c8d8d00d5a444578c37ee0e005c0ea5982ef43..d659fe07d46452b563fc0fdc2ac59821fb04e495 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -1142,7 +1142,7 @@ static int mlx5e_update_trust_state_hw(struct mlx5e_priv *priv, void *context)
        err = mlx5_set_trust_state(priv->mdev, *trust_state);
        if (err)
                return err;
-       priv->dcbx_dp.trust_state = *trust_state;
+       WRITE_ONCE(priv->dcbx_dp.trust_state, *trust_state);
 
        return 0;
 }
@@ -1187,16 +1187,18 @@ static int mlx5e_set_dscp2prio(struct mlx5e_priv *priv, u8 dscp, u8 prio)
 static int mlx5e_trust_initialize(struct mlx5e_priv *priv)
 {
        struct mlx5_core_dev *mdev = priv->mdev;
+       u8 trust_state;
        int err;
 
-       priv->dcbx_dp.trust_state = MLX5_QPTS_TRUST_PCP;
-
-       if (!MLX5_DSCP_SUPPORTED(mdev))
+       if (!MLX5_DSCP_SUPPORTED(mdev)) {
+               WRITE_ONCE(priv->dcbx_dp.trust_state, MLX5_QPTS_TRUST_PCP);
                return 0;
+       }
 
-       err = mlx5_query_trust_state(priv->mdev, &priv->dcbx_dp.trust_state);
+       err = mlx5_query_trust_state(priv->mdev, &trust_state);
        if (err)
                return err;
+       WRITE_ONCE(priv->dcbx_dp.trust_state, trust_state);
 
        mlx5e_params_calc_trust_tx_min_inline_mode(priv->mdev, &priv->channels.params,
                                                   priv->dcbx_dp.trust_state);