> Is that position stable across kernel versions? We do have stable naming
> for PCI devices and for platform devices that are the parent of a virtio
> device, but I would expect the virtio device to be numbered in probe
> order instead.

For me, it would be good enough to know who (= which device) created
this adapter when I look at the name at runtime. I wouldn't require this
to be stable across kernel versions. In general, this is just an info
string with no guarantees. But maybe you have reasons to insist on it
being stable nonetheless.