Devlink backport: fix race and lock issue

[William Tu]

Summary:
machine get stuck if try to switch to switchdev mode while toggling ns over BF kernel.
This is due to missing lock refactor series devlink and driver from kernel 6.0

How to test:
1. Configure SRIOV
2. Enable switchdev mode
3. Devlink reload
4. Add/Del network namespace

Note: Need to run the test multiple times to reproduce the issue.

How to fix:
Need to backport a series of devlink patches into BlueField 5.15 kernel, from 6.0 upstream kernel.
Patches needed for 5.4/5.15 kernel:

First series: 367dfa121205^..f0680ef0f949

second series: 5502e8712c9b^..c90005b5f75c

Also needed: 644a66c60f02

[William Tu (wtu)]

add merge request
https://code.launchpad.net/~wtu/ubuntu/+source/linux-bluefield/+git/linux-bluefield/+merge/450806

[Bartlomiej Zolnierkiewicz (bzolnier)]

This bug is awaiting verification that the linux-bluefield/5.15.0-1025.27 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy' to 'verification-done-jammy'. If the problem still exists, change the tag 'verification-needed-jammy' to 'verification-failed-jammy'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-bluefield/5.15.0-1027.29 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-done-jammy-linux-bluefield'. If the problem still exists, change the tag 'verification-needed-jammy-linux-bluefield' to 'verification-failed-jammy-linux-bluefield'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Bartlomiej Zolnierkiewicz (bzolnier)]

Mark the verification as already done using the new tag.