Created attachment 417002 [details]
adding device

Description of problem:

Invalid device is added to the xml for the guest when using virt-manager to add a PCI device to a guest.

Trying to add 04:10.0 on my system results in 04:16.0, so it seems and an unnecessary dev->hex conversion is done.  The device appears to be added correctly, but when starting the guest, I get the following error:

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 799, in run_domain
    vm.startup()
  File "/usr/share/virt-manager/virtManager/domain.py", line 1256, in startup
    self._backend.create()
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 317, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: this function is not supported by the hypervisor: Failed to read product/vendor ID for 0000:04:16.0

If I used 'virsh edit rawhide-test' to edit the slot back to 0x10, the guest boots just fine.

Version-Release number of selected component (if applicable):

virt-manager-0.8.3-3.fc13.noarch
libvirt-0.7.7-3.fc13.x86_64

How reproducible:

Every time.

Steps to Reproduce:

See attached screenshots.