[Qemu-devel] [PATCH] qom: fix cast results caching

[Sergey Fedorov]

A single cast cache is used for both an object casting and a class
casting.  In case of interface presence a class cast result may be not
the same pointer as opposite to an object casting. So do not cache cast
results for an object casting in a presence of interfaces.

Signed-off-by: Sergey Fedorov <address@hidden>
---
 qom/object.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qom/object.c b/qom/object.c
index fc19cf6..f7384de 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -473,7 +473,7 @@ Object *object_dynamic_cast_assert(Object *obj, const char 
*typename,
 
     assert(obj == inst);
 
-    if (obj && obj == inst) {
+    if (obj && obj == inst && !obj->class->interfaces) {
         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
             obj->class->cast_cache[i - 1] = obj->class->cast_cache[i];
         }
-- 
1.7.9.5