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net/mlx5e: Don't override user RSS upon set channels 

Currently, increasing the number of combined channels is changing
the RSS spread to use the new created channels.
Prevent the RSS spread change in case the user explicitly declare it,
to avoid overriding user configuration.

Tested:
when RSS default:

# ethtool -L ens8 combined 4
RSS spread will change and point to 4 channels.

# ethtool -X ens8 equal 4
# ethtool -L ens8 combined 6
RSS will not change after increasing the number of the channels.

Fixes: 8bf3686204 ('ethtool: ensure channel counts are within bounds during SCHANNELS')
Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Inbar Karmy 2017-08-14 16:12:16 +03:00 committed by Saeed Mahameed
parent 0556ce72ab
commit 5a8e12678c
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
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@ -641,8 +641,10 @@ int mlx5e_ethtool_set_channels(struct mlx5e_priv *priv,
new_channels.params = priv->channels.params;
new_channels.params.num_channels = count;
mlx5e_build_default_indir_rqt(priv->mdev, new_channels.params.indirection_rqt,
MLX5E_INDIR_RQT_SIZE, count);
if (!netif_is_rxfh_configured(priv->netdev))
mlx5e_build_default_indir_rqt(priv->mdev,
new_channels.params.indirection_rqt,
MLX5E_INDIR_RQT_SIZE, count);
if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
priv->channels.params = new_channels.params;