[for-3.1,1/2] acpi: Improve acpi_send_event() type safety

acpi_send_event() requires an object that implements
TYPE_ACPI_DEVICE_IF.  Indicate that in the function prototype.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 include/hw/acpi/acpi_dev_interface.h | 2 +-
 hw/acpi/acpi_interface.c             | 5 ++---
 hw/acpi/cpu.c                        | 4 ++--
 hw/acpi/cpu_hotplug.c                | 2 +-
 hw/acpi/memory_hotplug.c             | 4 ++--
 hw/acpi/nvdimm.c                     | 2 +-
 hw/acpi/pcihp.c                      | 4 ++--
 hw/acpi/vmgenid.c                    | 2 +-
 8 files changed, 12 insertions(+), 13 deletions(-)

On Mon, 23 Jul 2018 16:31:44 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:

> acpi_send_event() requires an object that implements
> TYPE_ACPI_DEVICE_IF.  Indicate that in the function prototype.
> 
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
It's not like acpi_send_event would ever need access to more
than AcpiDeviceIf, so it's fine to make it more strict.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

PS:
checkpatch is not happy with this patch

> ---
>  include/hw/acpi/acpi_dev_interface.h | 2 +-
>  hw/acpi/acpi_interface.c             | 5 ++---
>  hw/acpi/cpu.c                        | 4 ++--
>  hw/acpi/cpu_hotplug.c                | 2 +-
>  hw/acpi/memory_hotplug.c             | 4 ++--
>  hw/acpi/nvdimm.c                     | 2 +-
>  hw/acpi/pcihp.c                      | 4 ++--
>  hw/acpi/vmgenid.c                    | 2 +-
>  8 files changed, 12 insertions(+), 13 deletions(-)
> 
> diff --git a/include/hw/acpi/acpi_dev_interface.h b/include/hw/acpi/acpi_dev_interface.h
> index dabf4c4fc9..bab71f9d60 100644
> --- a/include/hw/acpi/acpi_dev_interface.h
> +++ b/include/hw/acpi/acpi_dev_interface.h
> @@ -31,7 +31,7 @@ typedef struct AcpiDeviceIf {
>      Object Parent;
>  } AcpiDeviceIf;
>  
> -void acpi_send_event(DeviceState *dev, AcpiEventStatusBits event);
> +void acpi_send_event(AcpiDeviceIf *dev, AcpiEventStatusBits event);
>  
>  /**
>   * AcpiDeviceIfClass:
> diff --git a/hw/acpi/acpi_interface.c b/hw/acpi/acpi_interface.c
> index 6583917b8e..f9b538293e 100644
> --- a/hw/acpi/acpi_interface.c
> +++ b/hw/acpi/acpi_interface.c
> @@ -2,12 +2,11 @@
>  #include "hw/acpi/acpi_dev_interface.h"
>  #include "qemu/module.h"
>  
> -void acpi_send_event(DeviceState *dev, AcpiEventStatusBits event)
> +void acpi_send_event(AcpiDeviceIf *dev, AcpiEventStatusBits event)
>  {
>      AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(dev);
>      if (adevc->send_event) {
> -        AcpiDeviceIf *adev = ACPI_DEVICE_IF(dev);
> -        adevc->send_event(adev, event);
> +        adevc->send_event(dev, event);
>      }
>  }
>  
> diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
> index 5ae595ecbe..2eb9b5a032 100644
> --- a/hw/acpi/cpu.c
> +++ b/hw/acpi/cpu.c
> @@ -233,7 +233,7 @@ void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
>      cdev->cpu = CPU(dev);
>      if (dev->hotplugged) {
>          cdev->is_inserting = true;
> -        acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
> +        acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
>      }
>  }
>  
> @@ -249,7 +249,7 @@ void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
>      }
>  
>      cdev->is_removing = true;
> -    acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
> +    acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
>  }
>  
>  void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st,
> diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c
> index 5243918125..5a1599796b 100644
> --- a/hw/acpi/cpu_hotplug.c
> +++ b/hw/acpi/cpu_hotplug.c
> @@ -79,7 +79,7 @@ void legacy_acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
>      if (*errp != NULL) {
>          return;
>      }
> -    acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
> +    acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
>  }
>  
>  void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner,
> diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
> index 0ff1712c4c..24b2aa0301 100644
> --- a/hw/acpi/memory_hotplug.c
> +++ b/hw/acpi/memory_hotplug.c
> @@ -280,7 +280,7 @@ void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st,
>      mdev->is_enabled = true;
>      if (dev->hotplugged) {
>          mdev->is_inserting = true;
> -        acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
> +        acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
>      }
>  }
>  
> @@ -296,7 +296,7 @@ void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev,
>      }
>  
>      mdev->is_removing = true;
> -    acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
> +    acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS);
>  }
>  
>  void acpi_memory_unplug_cb(MemHotplugState *mem_st,
> diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
> index 27eeb6609f..bdc373696d 100644
> --- a/hw/acpi/nvdimm.c
> +++ b/hw/acpi/nvdimm.c
> @@ -921,7 +921,7 @@ static const MemoryRegionOps nvdimm_dsm_ops = {
>  void nvdimm_acpi_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev)
>  {
>      if (dev->hotplugged) {
> -        acpi_send_event(DEVICE(hotplug_dev), ACPI_NVDIMM_HOTPLUG_STATUS);
> +        acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_NVDIMM_HOTPLUG_STATUS);
>      }
>  }
>  
> diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
> index 80d42e12ff..b3bb11dac5 100644
> --- a/hw/acpi/pcihp.c
> +++ b/hw/acpi/pcihp.c
> @@ -237,7 +237,7 @@ void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
>      }
>  
>      s->acpi_pcihp_pci_status[bsel].up |= (1U << slot);
> -    acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
> +    acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
>  }
>  
>  void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
> @@ -253,7 +253,7 @@ void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
>      }
>  
>      s->acpi_pcihp_pci_status[bsel].down |= (1U << slot);
> -    acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
> +    acpi_send_event(ACPI_DEVICE_IF(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
>  }
>  
>  static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size)
> diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c
> index d78b579a20..74caedde79 100644
> --- a/hw/acpi/vmgenid.c
> +++ b/hw/acpi/vmgenid.c
> @@ -158,7 +158,7 @@ static void vmgenid_update_guest(VmGenIdState *vms)
>              cpu_physical_memory_write(vmgenid_addr, guid_le.data,
>                                        sizeof(guid_le.data));
>              /* Send _GPE.E05 event */
> -            acpi_send_event(DEVICE(obj), ACPI_VMGENID_CHANGE_STATUS);
> +            acpi_send_event(ACPI_DEVICE_IF(obj), ACPI_VMGENID_CHANGE_STATUS);
>          }
>      }
>  }