Re: [Qemu-devel] [PATCH] qdev: relax bus type check in qdev_device_add() (v2)

[Konrad Frederic <fred.konrad@greensocs.com>]

On 29/11/2012 16:12, Anthony Liguori wrote:
> We are currently checking for an exact type match.  Use QOM dynamic_cast to
> check for a compatible type instead.
>
> Cc: Konrad Frederic<fred.konrad@greensocs.com>
> Cc: Peter Maydell<peter.maydell@linaro.org>
> Signed-off-by: Anthony Liguori<aliguori@us.ibm.com>
> ---
> v1 ->  v2:
>   - also add cast to qbus_find_recursive (Peter)
>   - simplify by doing object_dynamic_cast instead of messing with classes
> ---
>   hw/qdev-monitor.c | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c
> index 479eecd..a1b4d6a 100644
> --- a/hw/qdev-monitor.c
> +++ b/hw/qdev-monitor.c
> @@ -289,8 +289,7 @@ static BusState *qbus_find_recursive(BusState *bus, const char *name,
>       if (name&&  (strcmp(bus->name, name) != 0)) {
>           match = 0;
>       }
> -    if (bus_typename&&
> -        (strcmp(object_get_typename(OBJECT(bus)), bus_typename) != 0)) {
> +    if (bus_typename&&  !object_dynamic_cast(OBJECT(bus), bus_typename)) {
>           match = 0;
>       }
>       if (match) {
> @@ -435,7 +434,7 @@ DeviceState *qdev_device_add(QemuOpts *opts)
>           if (!bus) {
>               return NULL;
>           }
> -        if (strcmp(object_get_typename(OBJECT(bus)), k->bus_type) != 0) {
> +        if (!object_dynamic_cast(OBJECT(bus), k->bus_type)) {
>               qerror_report(QERR_BAD_BUS_FOR_DEVICE,
>                             driver, object_get_typename(OBJECT(bus)));
>               return NULL;
That seems to work.

Thanks,

Fred.