net/mlx5: Add MLX5_FLEXIBLE_INLEN to safely calculate cmd inlen
Some commands use a flexible array after a common header. Add a macro to safely calculate the total input length of the command, detecting overflows and printing errors with specific values when such overflows happen. 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: Jakub Kicinski <kuba@kernel.org>
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