[dpdk-stable] [PATCH] net/mlx5: fix modify field action order for IPv6

[Slava Ovsiienko]

> -----Original Message-----
> From: Alexander Kozyrev <akozyrev at nvidia.com>
> Sent: Wednesday, April 7, 2021 4:15
> To: dev at dpdk.org
> Cc: stable at dpdk.org; Raslan Darawsheh <rasland at nvidia.com>; Slava
> Ovsiienko <viacheslavo at nvidia.com>
> Subject: [PATCH] net/mlx5: fix modify field action order for IPv6
> 
> Mellanox hardware can only modify any packet field in 32-bit chunks, which
> means 4 such chunks are needed to modify an IPv6 address.
> The modification order of these chunks starts from the most significant bits
> for the IPv6 address. That leads to confusing results when trying to modify
> either source or destination address via the MODIFY_FIELD action. Fix the
> order of 32-bit chunks for IPv6 addresses modification by starting from the
> least significant bits.
> 
> Fixes: 641dbe4fb053 ("net/mlx5: support modify field flow action")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>