net/mlx5: fix eCPRI item value with mask

  When creating a flow with eCPRI item, the mask and the value are both
needed in order to build the matching criteria.

In the current implementation, the unused value bits clear operation
was missed when filling the mask and value fields. For the value, the
bits not required were not masked with the mask provided. Indeed,
this action is not mandatory. But when creating a flow in the root
table, the kernel driver got involved and a check would prevent this
flow from being created. The same flow could be created successfully
with the userspace rdma-core on the non-root tables.

An AND operation needs to be added to clear the unused bits in the
value when building the matching criteria. Then the same flow can be
created successfully no matter with kernel driver or with rdma-core.

Fixes: daa38a8924a0 ("net/mlx5: add flow translation of eCPRI header")
Cc: stable@dpdk.org

Signed-off-by: Bing Zhao <bingz@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
  

Hi,

> -----Original Message-----
> From: Bing Zhao <bingz@nvidia.com>
> Sent: Thursday, November 19, 2020 4:42 AM
> To: Slava Ovsiienko <viacheslavo@nvidia.com>; Matan Azrad
> <matan@nvidia.com>
> Cc: dev@dpdk.org; Ori Kam <orika@nvidia.com>; Raslan Darawsheh
> <rasland@nvidia.com>; stable@dpdk.org
> Subject: [PATCH] net/mlx5: fix eCPRI item value with mask
> 
> When creating a flow with eCPRI item, the mask and the value are both
> needed in order to build the matching criteria.
> 
> In the current implementation, the unused value bits clear operation
> was missed when filling the mask and value fields. For the value, the
> bits not required were not masked with the mask provided. Indeed,
> this action is not mandatory. But when creating a flow in the root
> table, the kernel driver got involved and a check would prevent this
> flow from being created. The same flow could be created successfully
> with the userspace rdma-core on the non-root tables.
> 
> An AND operation needs to be added to clear the unused bits in the
> value when building the matching criteria. Then the same flow can be
> created successfully no matter with kernel driver or with rdma-core.
> 
> Fixes: daa38a8924a0 ("net/mlx5: add flow translation of eCPRI header")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Bing Zhao <bingz@nvidia.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
> ---

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh