hostdev: Report the domain name for used hostdevs during nodedev-detach

The nodedev-detach can report the name of the domain using the device
just the way nodedev-reattach does it.
Signed-off-by: NShivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

src/util/virhostdev.c

@@ -1521,11 +1521,18 @@ int
 virHostdevPCINodeDeviceDetach(virHostdevManagerPtr hostdev_mgr,
                               virPCIDevicePtr pci)
 {
+    virPCIDeviceAddressPtr devAddr = NULL;
     int ret = -1;
 
     virObjectLock(hostdev_mgr->activePCIHostdevs);
     virObjectLock(hostdev_mgr->inactivePCIHostdevs);
 
+    if (!(devAddr = virPCIDeviceGetAddress(pci)))
+        goto out;
+
+    if (virHostdevIsPCINodeDeviceUsed(devAddr, hostdev_mgr))
+        goto out;
+
     if (virPCIDeviceDetach(pci, hostdev_mgr->activePCIHostdevs,
                            hostdev_mgr->inactivePCIHostdevs) < 0) {
         goto out;
@@ -1535,6 +1542,7 @@ virHostdevPCINodeDeviceDetach(virHostdevManagerPtr hostdev_mgr,
  out:
     virObjectUnlock(hostdev_mgr->inactivePCIHostdevs);
     virObjectUnlock(hostdev_mgr->activePCIHostdevs);
+    VIR_FREE(devAddr);
     return ret;
 }