[libvirt] [PATCH] qemu: Ignore missing query-migrate-parameters

[Jiri Denemark]

Trivially no migration parameters are supported when
query-migrate-parameters QMP command is missing. There's no need to
report an error in such case especially when doing so breaks
compatibility with old QEMU.

https://bugzilla.redhat.com/show_bug.cgi?id=1441934

Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
 src/qemu/qemu_monitor_json.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 98e3c53f5..083729003 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -2660,6 +2660,11 @@ qemuMonitorJSONGetMigrationParams(qemuMonitorPtr mon,
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
         goto cleanup;
 
+    if (qemuMonitorJSONHasError(reply, "CommandNotFound")) {
+        ret = 0;
+        goto cleanup;
+    }
+
     if (qemuMonitorJSONCheckError(cmd, reply) < 0)
         goto cleanup;
 
-- 
2.12.2