There was a race in VF unregister (in net-next only) which can be triggered if SR-IOV is disabled on host side, which causes PCI hotplug removal.
Stephen Hemminger (1): netvsc: fix rtnl deadlock on unregister of vf drivers/net/hyperv/netvsc_drv.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) -- 2.11.0