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    Subject[PATCH 5.15 341/846] Revert "net/mlx5e: Block offload of outer header csum for GRE tunnel"
    Date
    From: Aya Levin <ayal@nvidia.com>

    [ Upstream commit 01c3fd113ef50490ffd43f78f347ef6bb008510b ]

    This reverts commit 54e1217b90486c94b26f24dcee1ee5ef5372f832.

    Although the NIC doesn't support offload of outer header CSUM, using
    gso_partial_features allows offloading the tunnel's segmentation. The
    driver relies on the stack CSUM calculation of the outer header. For
    this, NETIF_F_GSO_GRE_CSUM must be a member of the device's features.

    Fixes: 54e1217b9048 ("net/mlx5e: Block offload of outer header csum for GRE tunnel")
    Signed-off-by: Aya Levin <ayal@nvidia.com>
    Reviewed-by: Gal Pressman <gal@nvidia.com>
    Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 9 ++++++---
    1 file changed, 6 insertions(+), 3 deletions(-)

    diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
    index a0bf3d386b708..f075bb8ccd00d 100644
    --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
    +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
    @@ -4495,9 +4495,12 @@ static void mlx5e_build_nic_netdev(struct net_device *netdev)
    }

    if (mlx5e_tunnel_proto_supported_tx(mdev, IPPROTO_GRE)) {
    - netdev->hw_features |= NETIF_F_GSO_GRE;
    - netdev->hw_enc_features |= NETIF_F_GSO_GRE;
    - netdev->gso_partial_features |= NETIF_F_GSO_GRE;
    + netdev->hw_features |= NETIF_F_GSO_GRE |
    + NETIF_F_GSO_GRE_CSUM;
    + netdev->hw_enc_features |= NETIF_F_GSO_GRE |
    + NETIF_F_GSO_GRE_CSUM;
    + netdev->gso_partial_features |= NETIF_F_GSO_GRE |
    + NETIF_F_GSO_GRE_CSUM;
    }

    if (mlx5e_tunnel_proto_supported_tx(mdev, IPPROTO_IPIP)) {
    --
    2.34.1


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