net/mlx5e: Update rx ring hw mtu upon each rx-fcs flag change
rq->hw_mtu is used in function en_rx.c/mlx5e_skb_from_cqe_mpwrq_linear() to catch oversized packets. If FCS is concatenated to the end of the packet then the check should be updated accordingly. Rx rings initialization (mlx5e_init_rxq_rq()) invoked for every new set of channels, as part of mlx5e_safe_switch_params(), unknowingly if it runs with default configuration or not. Current rq->hw_mtu initialization assumes default configuration and ignores params->scatter_fcs_en flag state. Fix this, by accounting for params->scatter_fcs_en flag state during rq->hw_mtu initialization. In addition, updating rq->hw_mtu value during ingress traffic might lead to packets drop and oversize_pkts_sw_drop counter increase with no good reason. Hence we remove this optimization and switch the set of channels with a new one, to make sure we don't get false positives on the oversize_pkts_sw_drop counter. Fixes: 102722fc ("net/mlx5e: Add support for RXFCS feature flag") Signed-off-by:Adham Faris <afaris@nvidia.com> Reviewed-by:
Tariq Toukan <tariqt@nvidia.com> Signed-off-by:
Saeed Mahameed <saeedm@nvidia.com>
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565b4824