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net/mlx5e: Properly block HW GRO when XDP is enabled

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HW GRO is incompatible and mutually exclusive with XDP and XSK. However,
the needed checks are only made when enabling XDP. If HW GRO is enabled
when XDP is already active, the command will succeed, and XDP will be
skipped in the data path, although still enabled.

This commit fixes the bug by checking the XDP and XSK status in
mlx5e_fix_features and disabling HW GRO if XDP is enabled.

Fixes: 83439f3c37 ("net/mlx5e: Add HW-GRO offload")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Maxim Mikityanskiy 2022-04-12 18:54:26 +03:00 committed by Saeed Mahameed
parent cf6e34c8c2
commit b0617e7b35
1 changed files with 12 additions and 0 deletions
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12
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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@ -3905,6 +3905,18 @@ static netdev_features_t mlx5e_fix_features(struct net_device *netdev,
netdev_warn(netdev, "LRO is incompatible with XDP\n");
features &= ~NETIF_F_LRO;
}
if (features & NETIF_F_GRO_HW) {
netdev_warn(netdev, "HW GRO is incompatible with XDP\n");
features &= ~NETIF_F_GRO_HW;
}
}
if (priv->xsk.refcnt) {
if (features & NETIF_F_GRO_HW) {
netdev_warn(netdev, "HW GRO is incompatible with AF_XDP (%u XSKs are active)\n",
priv->xsk.refcnt);
features &= ~NETIF_F_GRO_HW;
}
}
if (MLX5E_GET_PFLAG(params, MLX5E_PFLAG_RX_CQE_COMPRESS)) {