Checking whether the counter is IB counter was performed with the wrong index. Fixes: 859081d3fbbf ("net/mlx5: add out of buffer counter to extended statistic") Cc: stable@dpdk.org Signed-off-by: Shahaf Shuler <shahafs@mellanox.com> Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>