Re: [Qemu-devel] [PATCH for-2.4 1/2] core: reset handler for bus-less devices

[Christian Borntraeger <borntraeger@de.ibm.com>]

Am 09.07.2015 um 18:51 schrieb Cornelia Huck:
> Devices that don't live on a bus aren't caught by the normal device
> reset logic. Let's register a reset handler for those devices during
> device realization that calls the reset handler for the associated
> device class.
> 
> Suggested-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
reboot (from within guest) and external reset (system_reset in monitor)
now work fine with the s390 watchdog.

Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>

> ---
>  hw/core/qdev.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/hw/core/qdev.c b/hw/core/qdev.c
> index b2f404a..5c7c27b 100644
> --- a/hw/core/qdev.c
> +++ b/hw/core/qdev.c
> @@ -1018,6 +1018,13 @@ static bool device_get_realized(Object *obj, Error **errp)
>      return dev->realized;
>  }
> 
> +static void do_device_reset(void *opaque)
> +{
> +    DeviceState *dev = opaque;
> +
> +    device_reset(dev);
> +}
> +
>  static void device_set_realized(Object *obj, bool value, Error **errp)
>  {
>      DeviceState *dev = DEVICE(obj);
> @@ -1061,6 +1068,11 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
>              goto post_realize_fail;
>          }
> 
> +        if (!dev->parent_bus) {
> +            /* Make sure that reset is called for bus-less devices. */
> +            qemu_register_reset(do_device_reset, dev);
> +        }
> +
>          if (qdev_get_vmsd(dev)) {
>              vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
>                                             dev->instance_id_alias,
> @@ -1094,6 +1106,9 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
>          }
>          dev->pending_deleted_event = true;
>          DEVICE_LISTENER_CALL(unrealize, Reverse, dev);
> +        if (!dev->parent_bus) {
> +            qemu_unregister_reset(do_device_reset, dev);
> +        }
>      }
> 
>      if (local_err != NULL) {
>