ACK: [SRU][J:linux-bluefield][PATCH v1 0/1] mlxbf_gige: disable RX_DMA during NAPI poll

[Tim Gardner]

On 1/19/24 10:19 AM, David Thompson wrote:
> BugLink: https://bugs.launchpad.net/bugs/2049930
> 
> SRU Justification:
> 
> [Impact]
> 
> A regression has been introduced in the latest 22.04 kernel by including
> the following two commits:
>     revert "UBUNTU: SAUCE: Fix OOB handling RX packets in heavy traffic"
>     addition of upstream "mlxbf_gige: fix receive packet race condition"
> The regression will manifest as connectivity problems on "oob_net0" interface
> 
> [Fix]
> 
> Modify the GIGE driver to include the RX_DMA disable logic in its NAPI poll routine
> This logic was part of "UBUNTU: SAUCE: Fix OOB handling RX packets in heavy traffic"
> but not part of upstream "mlxbf_gige: fix receive packet race condition"
> 
> [Test Case]
> 
> Boot BF3 platform and ensure oob_net0 interface is up and has IP address
> Bring up many IP interfaces, including oob_net0, and make sure OOB interface
> is continually accessible (e.g. via ping)
> 
> [Regression Potential]
> 
> Low risk change, adding back in prior logic.
> 
> David Thompson (1):
>    UBUNTU: SAUCE: mlxbf_gige: add RX_DMA disable to NAPI poll routine
> 
>   drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
-- 
-----------
Tim Gardner
Canonical, Inc