** Also affects: linux-bluefield (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux-bluefield (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2049930
Title:
mlxbf_gige: disable RX_DMA during NAPI poll
Status in linux-bluefield package in Ubuntu:
Invalid
Status in linux-bluefield source package in Jammy:
New
Bug description:
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.
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