[PATCH] net/i40e: fix X722 NIC receives jumbo frame packets

[Kevin Traynor]

On 05/12/2022 11:15, David Marchand wrote:
> Hi Kevin, Qi,
> 
> On Thu, Nov 10, 2022 at 10:48 AM Zhang, Qi Z <qi.z.zhang at intel.com> wrote:
>>>> Subject: [PATCH] net/i40e: fix X722 NIC receives jumbo frame packets
>>>>
>>>> For NIC I40E_10G-10G_BASE_T_X722, when the port is configured with
>>>> link speed, it cannot receive jumbo frame packets.
>>>>
>>>> Because it set maximum frame size failed when starts the port that the
>>>> port link status is still down.
>>>>
>>>> This patch fix the error that starts the port will force set maximum frame
>>> size.
>>>>
>>>> Fixes: 2184f7cdeeaa ("net/i40e: fix max frame size config at port
>>>> level")
>>>> Cc: stable at dpdk.org
>>>>
>>>> Signed-off-by: Jie Wang <jie1x.wang at intel.com>
> 
> It seems this fix has been missed in 21.11 (for the reason we
> discussed with Kevin offlist).
> 
> Our QE reported that reception of jumbo frames seems broken in the 21.11 branch.
> 
> I can reproduce with a X710 nic: v21.11.0 is fine, but v21.11.1 and
> v21.11.2 show the following error log.
> Dec 05 05:41:37 xxx ovs-vswitchd[53585]:
> ovs|00183|dpdk|ERR|i40e_set_mac_max_frame(): Set max frame size at
> port level not applicable on link down
> 
> The log goes away with backporting this current patch.
> Can this be added to 21.11 queue, and have Intel validate this issue?
> 

Thanks David. I am have applied and pushing through CI. Will push to 
21.11 branch when it completes.

> Thanks!
> 
>