From e99ad93d028cf7a63fb9ffd7a620dc00b0d54fce Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 7 May 2012 13:53:20 +0200
Subject: [PATCH] qemu: Refactor qemuDomainSetVcpusFlags

This patch changes a switch statement into ifs when handling live vs.
configuration modifications getting rid of redundant code in case when
both live and persistent configuration gets changed.
---
 src/qemu/qemu_driver.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index c9e047e062..538dc25958 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3463,8 +3463,12 @@ qemuDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
         goto endjob;
     }
 
-    switch (flags) {
-    case VIR_DOMAIN_AFFECT_CONFIG:
+    if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+        if (qemudDomainHotplugVcpus(driver, vm, nvcpus) < 0)
+            goto endjob;
+    }
+
+    if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
         if (maximum) {
             persistentDef->maxvcpus = nvcpus;
             if (nvcpus < persistentDef->vcpus)
@@ -3472,24 +3476,12 @@ qemuDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
         } else {
             persistentDef->vcpus = nvcpus;
         }
-        ret = 0;
-        break;
 
-    case VIR_DOMAIN_AFFECT_LIVE:
-        ret = qemudDomainHotplugVcpus(driver, vm, nvcpus);
-        break;
-
-    case VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG:
-        ret = qemudDomainHotplugVcpus(driver, vm, nvcpus);
-        if (ret == 0) {
-            persistentDef->vcpus = nvcpus;
-        }
-        break;
+        if (virDomainSaveConfig(driver->configDir, persistentDef) < 0)
+            goto endjob;
     }
 
-    /* Save the persistent config to disk */
-    if (flags & VIR_DOMAIN_AFFECT_CONFIG)
-        ret = virDomainSaveConfig(driver->configDir, persistentDef);
+    ret = 0;
 
 endjob:
     if (qemuDomainObjEndJob(driver, vm) == 0)