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net/mlx5e: Fix trust state reset in reload

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commit b781bff882 upstream.

Setting dscp2prio during the driver reload can cause dcb ieee app list to
be not empty after the reload finish and as a result to a conflict between
the priority trust state reported by the app and the state in the device
register.

Reset the dcb ieee app list on initialization in case this is
conflicting with the register status.

Fixes: 2a5e7a1344 ("net/mlx5e: Add dcbnl dscp to priority support")
Signed-off-by: Moshe Tal <moshet@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Moshe Tal 2022-02-09 19:23:56 +02:00 • committed by Greg Kroah-Hartman
commit c7f87ad115
1 changed files with 10 additions and 0 deletions
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10
drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
View file

@ -1210,6 +1210,16 @@ static int mlx5e_trust_initialize(struct mlx5e_priv *priv)
if (err)
return err;
if (priv->dcbx_dp.trust_state == MLX5_QPTS_TRUST_PCP && priv->dcbx.dscp_app_cnt) {
/*
* Align the driver state with the register state.
* Temporary state change is required to enable the app list reset.
*/
priv->dcbx_dp.trust_state = MLX5_QPTS_TRUST_DSCP;
mlx5e_dcbnl_delete_app(priv);
priv->dcbx_dp.trust_state = MLX5_QPTS_TRUST_PCP;
}
mlx5e_params_calc_trust_tx_min_inline_mode(priv->mdev, &priv->channels.params,
priv->dcbx_dp.trust_state);