Re: [Qemu-devel] [PATCH v3] qdev: Avoid type assertion in qdev_build_hotpluggable_device_list()

[Jun Li <junmuzi@gmail.com>]

Ping, why does this patch has not been merged until now? Could anyone give
some explanations? Thx.

Regards,
Jun Li

On Wed, 11/05 15:03, Jun Li wrote:
> Currently when *obj is not a TYPE_DEVICE, qemu will abort. This patch just
> fixed it. When *obj is not a TYPE_DEVICE, just do not add it to hotpluggable
> device list.
> 
> This patch also fixed the following issue:
> 1, boot qemu using cli:
> $ /opt/qemu-git-arm/bin/qemu-system-x86_64 -monitor stdio -enable-kvm \
> -device virtio-scsi-pci,id=scsi0
> 
> 2, device_del scsi0 via hmp using tab key(first input device_del, then press
> "Tab" key).
> (qemu) device_del
> 
> After step2, qemu will abort.
> (qemu) device_del hw/core/qdev.c:930:qdev_build_hotpluggable_device_list:
> Object 0x5555563a2460 is not an instance of type device
> 
> Signed-off-by: Jun Li <junmuzi@gmail.com>
> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
> v3:
>   According to Andreas's suggestion, do some changes. As followings:
>   1, change the Subject to more meaningful.
>   2, use two "return 0" to return early avoid reindentation. And I have found in qcow2_grow_l1_table has also used two "return 0". So accept Andreas's suggestion. Thanks.
> 
> v2:
>   This version just do a little changes for the commit message.
> As following show:
> In v1,
> 1, boot qemu using cli:
> virtio-scsi-pci,id=scsi0 -enable-kvm
> 
> In v2,
> 1, boot qemu using cli:
> $ /opt/qemu-git-arm/bin/qemu-system-x86_64 -monitor stdio -enable-kvm \
> -device virtio-scsi-pci,id=scsi0
> ---
>  hw/core/qdev.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/core/qdev.c b/hw/core/qdev.c
> index b3d5196..7db3e13 100644
> --- a/hw/core/qdev.c
> +++ b/hw/core/qdev.c
> @@ -927,7 +927,12 @@ void qdev_alias_all_properties(DeviceState *target, Object *source)
>  int qdev_build_hotpluggable_device_list(Object *obj, void *opaque)
>  {
>      GSList **list = opaque;
> -    DeviceState *dev = DEVICE(obj);
> +    DeviceState *dev = (DeviceState *)object_dynamic_cast(OBJECT(obj),
> +                                                          "device");
> +
> +    if (dev == NULL) {
> +        return 0;
> +    }
>  
>      if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) {
>          *list = g_slist_append(*list, dev);
> -- 
> 1.9.3
>