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net/mlx5e: Properly block LRO when XDP is enabled

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[ Upstream commit cf6e34c8c22fba66bd21244b95ea47e235f68974 ]

LRO is incompatible and mutually exclusive with XDP. However, the needed
checks are only made when enabling XDP. If LRO 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 status in
mlx5e_fix_features and disabling LRO if XDP is enabled.

Fixes: 86994156c736 ("net/mlx5e: XDP fast RX drop bpf programs support")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maxim Mikityanskiy 2022-04-12 18:37:03 +03:00 committed by Greg Kroah-Hartman
parent 9cec84ed7c
commit 4048778318
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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@ -3542,6 +3542,13 @@ static netdev_features_t mlx5e_fix_features(struct net_device *netdev,
}
}
if (params->xdp_prog) {
if (features & NETIF_F_LRO) {
netdev_warn(netdev, "LRO is incompatible with XDP\n");
features &= ~NETIF_F_LRO;
}
}
if (MLX5E_GET_PFLAG(params, MLX5E_PFLAG_RX_CQE_COMPRESS)) {
features &= ~NETIF_F_RXHASH;
if (netdev->features & NETIF_F_RXHASH)