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net/mlx5e: E-switch, Fix rate calculation for overflow

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rate_bytes_ps is a 64-bit field. It passed as 32-bit field to
apply_police_params(). Due to this when police rate is higher
than 4Gbps, 32-bit calculation ignores the carry. This results
in incorrect rate configurationn the device.

Fix it by performing 64-bit calculation.

Fixes: fcb64c0f5640 ("net/mlx5: E-Switch, add ingress rate support")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Parav Pandit 2021-01-12 16:13:22 +02:00 committed by Saeed Mahameed
parent 9c899aa6ac
commit 0e22bfb7c0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -5040,7 +5040,7 @@ static int apply_police_params(struct mlx5e_priv *priv, u64 rate,
*/
if (rate) {
rate = (rate * BITS_PER_BYTE) + 500000;
rate_mbps = max_t(u32, do_div(rate, 1000000), 1);
rate_mbps = max_t(u64, do_div(rate, 1000000), 1);
}
err = mlx5_esw_modify_vport_rate(esw, vport_num, rate_mbps);