riptide_wave - Posted May 21st
[...]sadly I am unable to get the wle200nx to work with passthrough, but it looks like it may be possible for the wle600vx with some kernel changes on the host. I will be sure to share my findings as I go, and thanks again!
EDIT: Got PCI-E Passthrough working on the wle600vx with a small kernel change on the VM host! Patch can be found at http://servernetworktech.com/uploads/files/fix_no_bus_reset_qca988X.patch (used on Ubuntu 4.4.8 kernel) which will prevent the card from resetting the APU2 when used with passthrough.
riptide_wave, would you mind elaborating on where you got stuck with the WLE200NX? Your post on the proxmox forums  suggests that it would be an issue with the card.
I found one other relevant thread on this on the qemu mailinglist , where a similar error indeed points to a problem with that card. Is that what drove your conclusion?