[PATCH net-next 2/3] net/mlx4_en: Align behavior of set ring size flow via ethtool
From: Tariq Toukan <hidden>
Date: 2018-01-08 14:01:04
Subsystem:
mellanox ethernet driver (mlx4_en), mellanox mlx4 core vpi driver, networking drivers, the rest · Maintainers:
Tariq Toukan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Eugenia Emantayev <redacted> In current implementation, any requested RX/TX ring size value that is less than minimum is silently casted to nearest valid value. Update this behavior to align with mlx5 behavior by printing warning in dmesg and remaining the size unchanged. Kernel is responsible for verifying against the maximum. Signed-off-by: Eugenia Emantayev <redacted> Signed-off-by: Tariq Toukan <redacted> --- drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index bf1f04164885..ebc1f566a4d9 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c@@ -1094,12 +1094,21 @@ static int mlx4_en_set_ringparam(struct net_device *dev, if (param->rx_jumbo_pending || param->rx_mini_pending) return -EINVAL; + if (param->rx_pending < MLX4_EN_MIN_RX_SIZE) { + en_warn(priv, "%s: rx_pending (%d) < min (%d)\n", + __func__, param->rx_pending, + MLX4_EN_MIN_RX_SIZE); + return -EINVAL; + } + if (param->tx_pending < MLX4_EN_MIN_TX_SIZE) { + en_warn(priv, "%s: tx_pending (%d) < min (%lu)\n", + __func__, param->tx_pending, + MLX4_EN_MIN_TX_SIZE); + return -EINVAL; + } + rx_size = roundup_pow_of_two(param->rx_pending); - rx_size = max_t(u32, rx_size, MLX4_EN_MIN_RX_SIZE); - rx_size = min_t(u32, rx_size, MLX4_EN_MAX_RX_SIZE); tx_size = roundup_pow_of_two(param->tx_pending); - tx_size = max_t(u32, tx_size, MLX4_EN_MIN_TX_SIZE); - tx_size = min_t(u32, tx_size, MLX4_EN_MAX_TX_SIZE); if (rx_size == (priv->port_up ? priv->rx_ring[0]->actual_size : priv->rx_ring[0]->size) &&
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1.8.3.1