[PATCH] tools: fix the wrong check when use virsh setvcpus --maximum

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https://bugzilla.redhat.com/show_bug.cgi?id=1204033

We will ignore --maximum option when only use setvcpus with
this option, like this (this error is another issue):

 # virsh setvcpus test3 --maximum 10
 error: Failed to create controller cpu for group: No such file or directory

this is because we do not set it in flags before we check if there is
a flags set.

Refactor these code and fix the logic.

Signed-off-by: Luyao Huang <lhuang@xxxxxxxxxx>
---
 tools/virsh-domain.c | 33 ++++++++++++---------------------
 1 file changed, 12 insertions(+), 21 deletions(-)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 1d8225c..6ab7b05 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -6742,9 +6742,8 @@ cmdSetvcpus(vshControl *ctl, const vshCmd *cmd)
         flags |= VIR_DOMAIN_AFFECT_LIVE;
     if (guest)
         flags |= VIR_DOMAIN_VCPU_GUEST;
-    /* none of the options were specified */
-    if (!current && flags == 0)
-        flags = -1;
+    if (maximum)
+        flags |= VIR_DOMAIN_VCPU_MAXIMUM;
 
     if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
         return false;
@@ -6754,27 +6753,19 @@ cmdSetvcpus(vshControl *ctl, const vshCmd *cmd)
         goto cleanup;
     }
 
-    if (flags == -1) {
+    /* none of the options were specified */
+    if (!current && flags == 0) {
         if (virDomainSetVcpus(dom, count) != 0)
             goto cleanup;
     } else {
-        /* If the --maximum flag was given, we need to ensure only the
-           --config flag is in effect as well */
-        if (maximum) {
-            vshDebug(ctl, VSH_ERR_DEBUG, "--maximum flag was given\n");
-
-            flags |= VIR_DOMAIN_VCPU_MAXIMUM;
-
-            /* If neither the --config nor --live flags were given, OR
-               if just the --live flag was given, we need to error out
-               warning the user that the --maximum flag can only be used
-               with the --config flag */
-            if (live || !config) {
-
-                /* Warn the user about the invalid flag combination */
-                vshError(ctl, _("--maximum must be used with --config only"));
-                goto cleanup;
-            }
+        /* If neither the --config nor --live flags were given, OR
+           if just the --live flag was given, we need to error out
+           warning the user that the --maximum flag can only be used
+           with the --config flag */
+        if (maximum && (live || !config)) {
+            /* Warn the user about the invalid flag combination */
+            vshError(ctl, _("--maximum must be used with --config only"));
+            goto cleanup;
         }
 
         /* Apply the virtual cpu changes */
-- 
1.8.3.1

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