conf: eliminate virDomainPCIAddressReleaseSlot() in favor of ...Addr()

Surprisingly there was a virDomainPCIAddressReleaseAddr() function
already, but it was completely unused. Since we don't reserve entire
slots at once any more, there is no need to release entire slots
either, so we just replace the single call to
virDomainPCIAddressReleaseSlot() with a call to
virDomainPCIAddressReleaseAddr() and remove the now unused function.

The keen observer may be concerned that ...Addr() doesn't call
virDomainPCIAddressValidate(), as ...Slot() did. But really the
validation was pointless anyway - if the device hadn't been suitable
to be connected at that address, it would have failed validation
before every being reserved in the first place, so by definition it
will pass validation when it is being unplugged. (And anyway, even if
something "bad" happened and we managed to have a device incorrectly
at the given address, we would still want to be able to free it up for
use by a device that *did* validate properly).

src/conf/domain_addr.c

@@ -646,31 +646,6 @@ virDomainPCIAddressReleaseAddr(virDomainPCIAddressSetPtr addrs,
     return 0;
 }
 
-int
-virDomainPCIAddressReleaseSlot(virDomainPCIAddressSetPtr addrs,
-                               virPCIDeviceAddressPtr addr)
-{
-    /* permit any kind of connection type in validation, since we
-     * already had it, and are giving it back.
-     */
-    virDomainPCIConnectFlags flags = VIR_PCI_CONNECT_TYPES_MASK;
-    int ret = -1;
-    char *addrStr = NULL;
-
-    if (!(addrStr = virDomainPCIAddressAsString(addr)))
-        goto cleanup;
-
-    if (!virDomainPCIAddressValidate(addrs, addr, addrStr, flags, true))
-        goto cleanup;
-
-    addrs->buses[addr->bus].slot[addr->slot].functions = 0;
-    ret = 0;
- cleanup:
-    VIR_FREE(addrStr);
-    return ret;
-}
-
-
 virDomainPCIAddressSetPtr
 virDomainPCIAddressSetAlloc(unsigned int nbuses)
 {

src/conf/domain_addr.h

@@ -164,10 +164,6 @@ int virDomainPCIAddressReleaseAddr(virDomainPCIAddressSetPtr addrs,
                                    virPCIDeviceAddressPtr addr)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 
-int virDomainPCIAddressReleaseSlot(virDomainPCIAddressSetPtr addrs,
-                                   virPCIDeviceAddressPtr addr)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
-
 int virDomainPCIAddressReserveNextAddr(virDomainPCIAddressSetPtr addrs,
                                        virDomainDeviceInfoPtr dev,
                                        virDomainPCIConnectFlags flags,

src/libvirt_private.syms

@@ -99,7 +99,7 @@ virDomainPCIAddressAsString;
 virDomainPCIAddressBusSetModel;
 virDomainPCIAddressEnsureAddr;
 virDomainPCIAddressFlagsCompatible;
-virDomainPCIAddressReleaseSlot;
+virDomainPCIAddressReleaseAddr;
 virDomainPCIAddressReserveAddr;
 virDomainPCIAddressReserveNextAddr;
 virDomainPCIAddressSetAllMulti;

src/qemu/qemu_domain_address.c

@@ -2545,7 +2545,7 @@ qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
         devstr = info->alias;
 
     if (virDeviceInfoPCIAddressPresent(info) &&
-        virDomainPCIAddressReleaseSlot(priv->pciaddrs,
+        virDomainPCIAddressReleaseAddr(priv->pciaddrs,
                                        &info->addr.pci) < 0)
         VIR_WARN("Unable to release PCI address on %s",
                  NULLSTR(devstr));