Re: [Qemu-ppc] [Qemu-devel] [PATCH v2 15/21] pci-bridge/dec: Convert sysbus init function to realize function

[Philippe Mathieu-Daudé]

Hi Mao,

On 23/11/18 16:30, Mao Zhongyi wrote:
> Use DeviceClass rather than SysBusDeviceClass in
> pci_dec_21154_device_class_init().
> 
> Cc: address@hidden
> Cc: address@hidden
> Cc: address@hidden
> Cc: address@hidden
> 
> Signed-off-by: Mao Zhongyi <address@hidden>
> Signed-off-by: Zhang Shengju <address@hidden>
> Reviewed-by: David Gibson <address@hidden>
> Acked-by: David Gibson <address@hidden>
> ---
>  hw/pci-bridge/dec.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/hw/pci-bridge/dec.c b/hw/pci-bridge/dec.c
> index 84492d5e5f..5b21c20e50 100644
> --- a/hw/pci-bridge/dec.c
> +++ b/hw/pci-bridge/dec.c
> @@ -98,7 +98,7 @@ PCIBus *pci_dec_21154_init(PCIBus *parent_bus, int devfn)
>      return pci_bridge_get_sec_bus(br);
>  }
>  
> -static int pci_dec_21154_device_init(SysBusDevice *dev)
> +static void pci_dec_21154_device_realize(DeviceState *dev, Error **errp)
>  {
>      PCIHostState *phb;

Why don't you use:

       SysBusDevice *sbd = SYS_BUS_DEVICE(dev);

like in all the other patches from this series...?

>  
> @@ -108,9 +108,8 @@ static int pci_dec_21154_device_init(SysBusDevice *dev)
>                            dev, "pci-conf-idx", 0x1000);
>      memory_region_init_io(&phb->data_mem, OBJECT(dev), &pci_host_data_le_ops,
>                            dev, "pci-data-idx", 0x1000);
> -    sysbus_init_mmio(dev, &phb->conf_mem);
> -    sysbus_init_mmio(dev, &phb->data_mem);
> -    return 0;
> +    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &phb->conf_mem);
> +    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &phb->data_mem);

... this would save extra type checking here, as explain by Peter:
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg03644.html

>  }
>  
>  static void dec_21154_pci_host_realize(PCIDevice *d, Error **errp)
> @@ -150,9 +149,9 @@ static const TypeInfo dec_21154_pci_host_info = {
>  
>  static void pci_dec_21154_device_class_init(ObjectClass *klass, void *data)
>  {
> -    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
> +    DeviceClass *dc = DEVICE_CLASS(klass);
>  
> -    sdc->init = pci_dec_21154_device_init;
> +    dc->realize = pci_dec_21154_device_realize;
>  }
>  
>  static const TypeInfo pci_dec_21154_device_info = {
>