Re: [Qemu-devel] [PATCH] hw/s390x: Mark the "sclpquiesce" device with user_creatable = false

[Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>]

On Thu,  5 Oct 2017 10:45:05 +0200
Thomas Huth <thuth@redhat.com> wrote:

> The "sclpquiesce" device is just an internal device that should not be
> created by the user directly. Though it currently does not seem to
> cause any obvious trouble when the user instantiates an additional
> device, let's better mark it with user_creatable = false to avoid
> unexpected behavior, e.g. because the quiesce notifier gets
> registered multiple times.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>


Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>

> ---
>  hw/s390x/sclpquiesce.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/s390x/sclpquiesce.c b/hw/s390x/sclpquiesce.c
> index 762cb18..0241643 100644
> --- a/hw/s390x/sclpquiesce.c
> +++ b/hw/s390x/sclpquiesce.c
> @@ -118,8 +118,13 @@ static void quiesce_class_init(ObjectClass
> *klass, void *data) dc->reset = quiesce_reset;
>      dc->vmsd = &vmstate_sclpquiesce;
>      set_bit(DEVICE_CATEGORY_MISC, dc->categories);
> -    k->init = quiesce_init;
> +    /*
> +     * Reason: This is just an internal device - the notifier should
> +     * not be registered multiple times in quiesce_init()
> +     */
> +    dc->user_creatable = false;
> 
> +    k->init = quiesce_init;
>      k->get_send_mask = send_mask;
>      k->get_receive_mask = receive_mask;
>      k->can_handle_event = can_handle_event;