net/mlx5: fix an ineffective calculation in hairpin splitter

  The flow_hairpin_split function defines a pointer called addr that
points to the list of items.
When the function wants to progress in the list, it adds the size of an
item to the pointer.

At the end of the function, it precedes the pointer one more time even
though it is not used afterwards. In fact, this line is unaffected and
the operation of the function would have been no different without it.

Remove the line where the pointer is preceded unnecessarily.

Fixes: d85c7b5ea59f ("net/mlx5: split hairpin flows")
Cc: stable@dpdk.org

Signed-off-by: Michael Baum <michaelba@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow.c | 1 -
 1 file changed, 1 deletion(-)
  

Hi,

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Michael Baum
> Sent: Tuesday, July 21, 2020 3:00 PM
> To: dev@dpdk.org
> Cc: Matan Azrad <matan@mellanox.com>; Slava Ovsiienko
> <viacheslavo@mellanox.com>; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/mlx5: fix an ineffective calculation in hairpin
> splitter
> 
> The flow_hairpin_split function defines a pointer called addr that
> points to the list of items.
> When the function wants to progress in the list, it adds the size of an
> item to the pointer.
> 
> At the end of the function, it precedes the pointer one more time even
> though it is not used afterwards. In fact, this line is unaffected and
> the operation of the function would have been no different without it.
> 
> Remove the line where the pointer is preceded unnecessarily.
> 
> Fixes: d85c7b5ea59f ("net/mlx5: split hairpin flows")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Michael Baum <michaelba@mellanox.com>
> Acked-by: Matan Azrad <matan@mellanox.com>
> ---
>  drivers/net/mlx5/mlx5_flow.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
> index aba8f41..cf7052b 100644
> --- a/drivers/net/mlx5/mlx5_flow.c
> +++ b/drivers/net/mlx5/mlx5_flow.c
> @@ -3518,7 +3518,6 @@ struct mlx5_flow_tunnel_info {
>  	tag_item->data = UINT32_MAX;
>  	tag_item->id = UINT16_MAX;
>  	item->mask = tag_item;
> -	addr += sizeof(struct mlx5_rte_flow_item_tag);
>  	item->last = NULL;
>  	item++;
>  	item->type = RTE_FLOW_ITEM_TYPE_END;
> --
> 1.8.3.1


Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh