Hello Ferruh,

[:snip:]

quoted

btw, I can see 'MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL' still checked if it in
the first location of the items (items[0].type), in
'flow_dv_validate()', 'mlx5_flow_dv.c'

https://git.dpdk.org/dpdk/tree/drivers/net/mlx5/mlx5_flow_dv.c?h=v21.0

quoted

5-rc1#n6298
Can you please confirm that this is expected?

The `items` variable in that function iterates on pattern array:

for (; items->type != RTE_FLOW_ITEM_TYPE_END; items++) {

In this scenario,

case MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL:
  if (items[0].type !=
        (typeof(items[0].type))MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL)

compares items with itself.

I'll post an updated patch.

Regards,
Gregory