Comment # 2 on bug 107635 from Daniel Drake

This issue was detected on 4.18.3 when using a somewhat reduced developer
config. When using our usual full distro kernel config (from Ubuntu), the issue
convincingly goes away.

Both Jian-Hong and I looked at the differences in the config and couldn't spot
anything obvious that would explain different behaviour.

There's probably a bug here somewhere, but as it's working on our shipped
config I'll close this issue, as we need to focus our time on other issues on
this platform.