Some facts I found: - The issue can be reproduced easily on a local VM - 5.5.11 KOTD still shows the same Oops - 5.6-rc7 works fine So it looks like an issue specific to 5.5.y stable. And, the bisection pointed the patch patches.kernel.org/5.5.9-066-driver-core-Call-sync_state-even-if-supplier-ha.patch I'm building a test kernel with the revert in OBS home:tiwai:bsc1167245.