The pointed Property structure is accessed read-only.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/core/qdev-properties.c    | 2 +-
 include/hw/qdev-properties.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 357b8761b5..858c33830c 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -50,7 +50,7 @@ void qdev_prop_allow_set_link_before_realize(const Object *obj,
     }
 }
 
-void *object_field_prop_ptr(Object *obj, Property *prop)
+void *object_field_prop_ptr(Object *obj, const Property *prop)
 {
     void *ptr = obj;
     ptr += prop->offset;
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index e1df08876c..b5a0ab34f3 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -206,7 +206,7 @@ void qdev_prop_set_macaddr(DeviceState *dev, const char *name,
                            const uint8_t *value);
 void qdev_prop_set_enum(DeviceState *dev, const char *name, int value);
 
-void *object_field_prop_ptr(Object *obj, Property *prop);
+void *object_field_prop_ptr(Object *obj, const Property *prop);
 
 void qdev_prop_register_global(GlobalProperty *prop);
 const GlobalProperty *qdev_find_global_prop(Object *obj,
-- 
2.38.1