Comment 1 for bug 1865962

There are some public bug reports on bugzilla, but none of them look similar to ours.

https://bugzilla.kernel.org/show_bug.cgi?id=205749
It claims the fix lands on v5.4.16 and v5.5, and this patch already has been included in our focal kernel. It doesn't work for us.

https://bugzilla.kernel.org/show_bug.cgi?id=206329
This one is still open, and doesn't get fixed at v5.6-rc3, so not the same as ours.

https://bugzilla.kernel.org/show_bug.cgi?id=206719
The error message pretty similar to ours and fails at v5.4.22, but no one follow up

https://bugzilla.kernel.org/show_bug.cgi?id=206661
Another regression after v5.6-rc1, no fix until v5.6-rc4, affects our linux-5.6 oem kernel.

https://bugzilla.kernel.org/show_bug.cgi?id=206607
Similar errors, no follow up

https://bugzilla.kernel.org/show_bug.cgi?id=206395
Similar errors, but doesn't verify it with latest v5.6 mainline kernel.

This is our test results
5.3.0 - Good
5.3.18 - Good
5.4-rc1 - NG
5.4-rc4 - NG
5.4-rc8 - NG
5.4.0 - NG
5.4.16 - NG
5.4.24 - NG
5.5.0 - NG
5.5.8 - NG
5.6-rc1 - Good