[libvirt PATCH] qemu_monitor_json: fix JSON generator for VC chardev

[Pavel Hrdina <phrdina@xxxxxxxxxx>]

The correct backend type is 'vc', same as in qemuBuildChrChardevStr()
where we generate qemu command line.

Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
---
 src/qemu/qemu_monitor_json.c | 5 ++++-
 tests/qemumonitorjsontest.c  | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 97c5e5b36c..231f0ded32 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -7438,10 +7438,13 @@ qemuMonitorJSONAttachCharDevCommand(const char *chrID,
 
     switch ((virDomainChrType)chr->type) {
     case VIR_DOMAIN_CHR_TYPE_NULL:
-    case VIR_DOMAIN_CHR_TYPE_VC:
         backend_type = "null";
         break;
 
+    case VIR_DOMAIN_CHR_TYPE_VC:
+        backend_type = "vc";
+        break;
+
     case VIR_DOMAIN_CHR_TYPE_PTY:
         backend_type = "pty";
         break;
diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c
index 29c396891b..956423f10f 100644
--- a/tests/qemumonitorjsontest.c
+++ b/tests/qemumonitorjsontest.c
@@ -718,7 +718,7 @@ qemuMonitorJSONTestAttachChardev(virDomainXMLOptionPtr xmlopt,
 
     chr = (virDomainChrSourceDef) { .type = VIR_DOMAIN_CHR_TYPE_VC };
     CHECK("vc", false,
-          "{'id':'alias','backend':{'type':'null','data':{}}}");
+          "{'id':'alias','backend':{'type':'vc','data':{}}}");
 
     chr = (virDomainChrSourceDef) { .type = VIR_DOMAIN_CHR_TYPE_PTY };
     if (qemuMonitorJSONTestAttachOneChardev(xmlopt, schema, "pty", &chr,
-- 
2.29.2