Re: [Qemu-devel] [PATCH] hw: arm: musicpal: drop TYPE_WM8750 in object_property_set_link()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi Li,

On 22/11/18 11:00, Li Qiang wrote:
> The third argument of object_property_set_link() is the name of
> property, not related with the QOM type name, using the constant
> string instead.

You are correct.

> 
> Signed-off-by: Li Qiang <liq3ea@gmail.com>
> ---
>  hw/arm/musicpal.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/arm/musicpal.c b/hw/arm/musicpal.c
> index 9648b3af44..726ae29394 100644
> --- a/hw/arm/musicpal.c
> +++ b/hw/arm/musicpal.c
> @@ -1696,7 +1696,7 @@ static void musicpal_init(MachineState *machine)
>      dev = qdev_create(NULL, TYPE_MV88W8618_AUDIO);
>      s = SYS_BUS_DEVICE(dev);
>      object_property_set_link(OBJECT(dev), OBJECT(wm8750_dev),
> -                             TYPE_WM8750, NULL);
> +                             "wm8750", NULL);

Since this property is not related to migration, maybe we can resolve
this the other way, using TYPE_WM8750 in mv88w8618_audio_init():

-- >8 --
@@ -255,3 +255,3 @@ static void mv88w8618_audio_init(Object *obj)

-    object_property_add_link(OBJECT(dev), "wm8750", TYPE_WM8750,
+    object_property_add_link(OBJECT(dev), TYPE_WM8750, TYPE_WM8750,
                              (Object **) &s->wm,
---

So using the same definition would protect someone to accidentaly rename
the property name.

What do you think?

Regards,

Phil.

>      qdev_init_nofail(dev);
>      sysbus_mmio_map(s, 0, MP_AUDIO_BASE);
>      sysbus_connect_irq(s, 0, pic[MP_AUDIO_IRQ]);
>