Re: [PATCH v4 25/32] qdev: Make qdev_class_add_property() more flexible

[Eduardo Habkost]

On Mon, Dec 14, 2020 at 04:00:59PM +0100, Igor Mammedov wrote:
> On Fri, 11 Dec 2020 17:05:22 -0500
> Eduardo Habkost <ehabkost@redhat.com> wrote:
> 
> > Support Property.set_default and PropertyInfo.description even if
> > PropertyInfo.create is set.
> > 
> > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> > ---
> > Changes v1 -> v2:
> > * Patch redone after changes in the previous patches in the
> >   series
> > ---
> > Cc: Paolo Bonzini <pbonzini@redhat.com>
> > Cc: "Daniel P. Berrangé" <berrange@redhat.com>
> > Cc: Eduardo Habkost <ehabkost@redhat.com>
> > Cc: qemu-devel@nongnu.org
> > ---
> >  hw/core/qdev-properties.c | 17 +++++++++--------
> >  1 file changed, 9 insertions(+), 8 deletions(-)
> > 
> > diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
> > index 3bb05e7d0d..fcda0c8f4b 100644
> > --- a/hw/core/qdev-properties.c
> > +++ b/hw/core/qdev-properties.c
> > @@ -863,24 +863,25 @@ static void qdev_class_add_property(DeviceClass 
> > *klass, const char *name,
> >                                      Property *prop)
> >  {
> >      ObjectClass *oc = OBJECT_CLASS(klass);
> > +    ObjectProperty *op;
> >  
> >      if (prop->info->create) {
> > -        prop->info->create(oc, name, prop);
> > +        op = prop->info->create(oc, name, prop);
> >      } else {
> > -        ObjectProperty *op;
> > -
> >          op = object_class_property_add(oc,
> >                                         name, prop->info->name,
> >                                         field_prop_getter(prop->info),
> >                                         field_prop_setter(prop->info),
> >                                         prop->info->release,
> >                                         prop);
> > -        if (prop->set_default) {
> > -            prop->info->set_default_value(op, prop);
> > -        }
> >      }
> > -    object_class_property_set_description(oc, name,
> > -                                          prop->info->description);
> > +    if (prop->set_default) {
> > +        prop->info->set_default_value(op, prop);
> > +    }
> 
> > +    if (prop->info->description) {
> before that, null description wasn't allow, why relax rule now?

NULL description was already allowed before, because
object_class_property_set_description(..., NULL) works.

This means the conditional I've added above is completely
unnecessary.  I will fix this in the next version.  Thanks!

> 
> > +        object_class_property_set_description(oc, name,
> > +                                              prop->info->description);
> > +    }
> >  }
> >  
> >  /**
> 

-- 
Eduardo