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net/mlx4_en: Limit the number of RX rings 

Limit the number of RX rings by the number of cores
in the system.

Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Inbar Karmy 2017-10-10 12:28:34 +03:00 committed by David S. Miller
parent 7e1dc5e926
commit b8d394367a
1 changed files with 6 additions and 1 deletions
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7
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
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@ -1742,12 +1742,17 @@ static int mlx4_en_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
return err;
}
static int mlx4_en_get_max_num_rx_rings(struct net_device *dev)
{
return min_t(int, num_online_cpus(), MAX_RX_RINGS);
}
static void mlx4_en_get_channels(struct net_device *dev,
struct ethtool_channels *channel)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
channel->max_rx = MAX_RX_RINGS;
channel->max_rx = mlx4_en_get_max_num_rx_rings(dev);
channel->max_tx = priv->mdev->profile.max_num_tx_rings_p_up;
channel->rx_count = priv->rx_ring_num;