Hi Dmitry, Komali reports that she still sees the originally reported issue with your latest patch. This issue started with kernel.org commit 1455cf8dbfd06aa7651dcfccbadb7a093944ca65 (Wed Jul 19 17:24:30 2017 -0700).
cxgb4vf is getting loaded in the Hypervisor when a cxgb4 Virtual Function is assigned to a Virtual Machine, and the VM is brought up. We may need to do some debuging ... How would you like to proceed? Casey

