[libvirt] [PATCH 2/6] qemu: Make switch statements more strict

[Andrea Bolognani]

When switching over the values in the virDomainControllerModelPCI
enumeration, make sure the proper cast is in place so that the
compiler can warn us when the coverage is not exaustive.

For the same reason, fold some unstructured checks (performed by
comparing directly against some values in the enumeration) inside
an existing switch statement.
---
 src/qemu/qemu_command.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 552fdcf..f0b938f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -2664,19 +2664,13 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
         break;
 
     case VIR_DOMAIN_CONTROLLER_TYPE_PCI:
-        if (def->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT ||
-            def->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("wrong function called for pci-root/pcie-root"));
-            return NULL;
-        }
         if (def->idx == 0) {
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                            _("index for pci controllers of model '%s' must be > 0"),
                            virDomainControllerModelPCITypeToString(def->model));
             goto error;
         }
-        switch (def->model) {
+        switch ((virDomainControllerModelPCI) def->model) {
         case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
             if (def->opts.pciopts.modelName
                 == VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_NONE ||
@@ -2917,6 +2911,12 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
                virBufferAsprintf(&buf, ",numa_node=%d",
                                  def->opts.pciopts.numaNode);
             break;
+        case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
+        case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT:
+        case VIR_DOMAIN_CONTROLLER_MODEL_PCI_LAST:
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("wrong function called"));
+            goto error;
         }
         break;
 
@@ -6501,7 +6501,7 @@ qemuBuildGlobalControllerCommandLine(virCommandPtr cmd,
             bool cap = false;
             bool machine = false;
 
-            switch (cont->model) {
+            switch ((virDomainControllerModelPCI) cont->model) {
             case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
                 hoststr = "i440FX-pcihost";
                 cap = virQEMUCapsGet(qemuCaps, QEMU_CAPS_I440FX_PCI_HOLE64_SIZE);
-- 
2.7.4