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

[David Thompson]

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(+)

-- 
2.30.1