[Qemu-stable] [PATCH v4 5/7] qmp: Fix device-list-properties not to crash for abstract device

[Markus Armbruster]

Broken in commit f4eb32b "qmp: show QOM properties in
device-list-properties", v2.1.

Cc: address@hidden
Signed-off-by: Markus Armbruster <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
 qmp.c                          |  6 ++++++
 tests/device-introspect-test.c | 15 ++++-----------
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/qmp.c b/qmp.c
index 057a7cb..1413de4 100644
--- a/qmp.c
+++ b/qmp.c
@@ -515,6 +515,12 @@ DevicePropertyInfoList *qmp_device_list_properties(const 
char *typename,
         return NULL;
     }
 
+    if (object_class_is_abstract(klass)) {
+        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name",
+                   "non-abstract device type");
+        return NULL;
+    }
+
     obj = object_new(typename);
 
     QTAILQ_FOREACH(prop, &obj->properties, node) {
diff --git a/tests/device-introspect-test.c b/tests/device-introspect-test.c
index 832b60a..a8950a1 100644
--- a/tests/device-introspect-test.c
+++ b/tests/device-introspect-test.c
@@ -45,17 +45,10 @@ static void test_one_device(const char *type)
     QDict *resp;
     char *help, *qom_tree;
 
-    /*
-     * Skip this part for the abstract device test case, because
-     * device-list-properties crashes for such devices.
-     * FIXME fix it not to crash
-     */
-    if (strcmp(type, "device")) {
-        resp = qmp("{'execute': 'device-list-properties',"
-                   " 'arguments': {'typename': %s}}",
-                   type);
-        QDECREF(resp);
-    }
+    resp = qmp("{'execute': 'device-list-properties',"
+               " 'arguments': {'typename': %s}}",
+               type);
+    QDECREF(resp);
 
     help = hmp("device_add \"%s,help\"", type);
     g_free(help);
-- 
2.4.3