Hi, Ferruh

-----Original Message-----
From: Ferruh Yigit <redacted>
Sent: Tuesday, December 7, 2021 15:45
To: Slava Ovsiienko <redacted>; dev@dpdk.org
Cc: Matan Azrad <redacted>; Raslan Darawsheh
[off-list ref]; stable@dpdk.org
Subject: Re: [PATCH] net/mlx5: fix metadata endianness in modify field action

On 11/29/2021 12:32 PM, Viacheslav Ovsiienko wrote:

quoted

As modify field action immediate source parameter the metadata should
follow the CPU endianness (according to SET_META action structure
format), and mlx5 PMD wrongly handled the immediate parameter

metadata

quoted

buffer as big-endian, resulting in wrong metadata set action with
incorrect endianness.

Fixes: 40c8fb1fd3b3 ("net/mlx5: update modify field action")
Cc: stable@dpdk.org

Signed-off-by: Viacheslav Ovsiienko <redacted>
---
  drivers/net/mlx5/mlx5_flow_dv.c | 23 +++++++++++------------
  1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c

b/drivers/net/mlx5/mlx5_flow_dv.c index 4834c752d9..1c6cae8779 100644

--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c

@@ -1465,7 +1465,7 @@ static void
  mlx5_flow_field_id_to_modify_info
  		(const struct rte_flow_action_modify_data *data,
  		 struct field_modify_info *info, uint32_t *mask,
-		 uint32_t width, uint32_t *shift, struct rte_eth_dev *dev,
+		 uint32_t width, struct rte_eth_dev *dev,

Hi Viacheslav,

Is removing (unused) 'shift' variable related to the problem mentioned in the
commit log?

Related indirectly to metadata, but not directly to the issue. 
"shift" is unused leftover after changing immediate value format.
And this patch just provides collateral cleanup. Do you think we should
separate into dedicated cleanup patch? Or mention this cleanup in commit
message?

With best regards,
Slava

Only below "meta = rte_cpu_to_be_32(meta);" change block seems fixing the
issue and rest is cleanup, if that is the case can you please split the patch?