[dpdk-stable] [PATCH] net/mlx5: fix flow split combined with counter

[Matan Azrad]

From: Dekel Peled <dekelp at nvidia.com>
> Currently, for a flow containing a count action, if flow is split to sub-flows, a
> new counter will be created for each sub-flow.
> However only the counter created for the last sub-flow will be queried on flow
> query and cleared on flow removal.
> 
> This behavior is wrong, causing a leak of resources.
> Need to create just one counter per flow, and use it for all sub-flows.
> 
> This patch adds the required check to make sure a counter is created just once
> per flow, and used by all sub-flows.
> 
> Fixes: fa2d01c87d2b ("net/mlx5: support flow aging")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Dekel Peled <dekelp at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>