Re: [PATCH 2/2] qom/object_interfaces: Remove local_err in user_creatable_add_type

[Zhao Liu]

On Thu, Feb 29, 2024 at 11:37:39AM +0800, Zhenzhong Duan wrote:
> Date: Thu, 29 Feb 2024 11:37:39 +0800
> From: Zhenzhong Duan <zhenzhong.duan@intel.com>
> Subject: [PATCH 2/2] qom/object_interfaces: Remove local_err in
>  user_creatable_add_type
> X-Mailer: git-send-email 2.34.1
> 
> In user_creatable_add_type, there is mixed usage of ERRP_GUARD and
> local_err. This makes error_abort not taking effect in those callee
> functions with local_err passed.
> 
> Now that we already has ERRP_GUARD, remove local_err and use *errp
> instead.
> 
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
> ---
>  qom/object_interfaces.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
> index 255a7bf659..165cd433e7 100644
> --- a/qom/object_interfaces.c
> +++ b/qom/object_interfaces.c
> @@ -81,7 +81,6 @@ Object *user_creatable_add_type(const char *type, const 
> char *id,
>      ERRP_GUARD();
>      Object *obj;
>      ObjectClass *klass;
> -    Error *local_err = NULL;
>  
>      if (id != NULL && !id_wellformed(id)) {
>          error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "id", "an 
> identifier");
> @@ -109,20 +108,20 @@ Object *user_creatable_add_type(const char *type, const 
> char *id,
>  
>      assert(qdict);
>      obj = object_new(type);
> -    object_set_properties_from_qdict(obj, qdict, v, &local_err);
> -    if (local_err) {
> +    object_set_properties_from_qdict(obj, qdict, v, errp);

It's better to make object_set_properties_from_qdict someting (e.g.,
boolean). Maybe an extra cleanup?

> +    if (*errp) {
>          goto out;
>      }
>  
>      if (id != NULL) {
>          object_property_try_add_child(object_get_objects_root(),
> -                                      id, obj, &local_err);
> -        if (local_err) {
> +                                      id, obj, errp);
> +        if (*errp) {
>              goto out;
>          }
>      }

Here we could check whether the returned ObjectProperty* is NULL instaed
of dereferencing errp.

Thanks,
Zhao