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Re: [PATCH] virtio: Drop broken and superfluous object_property_set_link


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH] virtio: Drop broken and superfluous object_property_set_link()
Date: Tue, 21 Jul 2020 14:21:01 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0

On 7/21/20 2:11 PM, Markus Armbruster wrote:

Is there a line missing here?

> virtio_crypto_pci_realize() and copies the value of vcrypto->vdev's

                              ^^^

> property "cryptodev" to vcrypto's property:
> 
>     object_property_set_link(OBJECT(vrng), "rng", OBJECT(vrng->vdev.conf.rng),
>                              NULL);
> 
> Since it does so only after realize, this always fails, but the error
> is ignored.
> 
> It's actually superfluous: vcrypto's property is an alias of
> vcrypto->vdev's property, created by virtio_instance_init_common().
> 
> Drop the call.
> 
> Same for virtio_ccw_crypto_realize(), virtio_rng_pci_realize(),
> virtio_ccw_rng_realize().
> 
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
>  hw/s390x/virtio-ccw-crypto.c  | 3 ---
>  hw/s390x/virtio-ccw-rng.c     | 3 ---
>  hw/virtio/virtio-crypto-pci.c | 2 --
>  hw/virtio/virtio-rng-pci.c    | 3 ---
>  4 files changed, 11 deletions(-)
> 
> diff --git a/hw/s390x/virtio-ccw-crypto.c b/hw/s390x/virtio-ccw-crypto.c
> index 570c0333fc..358c74fb4b 100644
> --- a/hw/s390x/virtio-ccw-crypto.c
> +++ b/hw/s390x/virtio-ccw-crypto.c
> @@ -23,9 +23,6 @@ static void virtio_ccw_crypto_realize(VirtioCcwDevice 
> *ccw_dev, Error **errp)
>      if (!qdev_realize(vdev, BUS(&ccw_dev->bus), errp)) {
>          return;
>      }
> -
> -    object_property_set_link(OBJECT(vdev), "cryptodev",
> -                             OBJECT(dev->vdev.conf.cryptodev), NULL);
>  }
>  
>  static void virtio_ccw_crypto_instance_init(Object *obj)
> diff --git a/hw/s390x/virtio-ccw-rng.c b/hw/s390x/virtio-ccw-rng.c
> index 4bb8c16d79..2e3a9da5e8 100644
> --- a/hw/s390x/virtio-ccw-rng.c
> +++ b/hw/s390x/virtio-ccw-rng.c
> @@ -24,9 +24,6 @@ static void virtio_ccw_rng_realize(VirtioCcwDevice 
> *ccw_dev, Error **errp)
>      if (!qdev_realize(vdev, BUS(&ccw_dev->bus), errp)) {
>          return;
>      }
> -
> -    object_property_set_link(OBJECT(dev), "rng", OBJECT(dev->vdev.conf.rng),
> -                             NULL);
>  }
>  
>  static void virtio_ccw_rng_instance_init(Object *obj)
> diff --git a/hw/virtio/virtio-crypto-pci.c b/hw/virtio/virtio-crypto-pci.c
> index f1cc979d33..198f86e08c 100644
> --- a/hw/virtio/virtio-crypto-pci.c
> +++ b/hw/virtio/virtio-crypto-pci.c
> @@ -57,8 +57,6 @@ static void virtio_crypto_pci_realize(VirtIOPCIProxy 
> *vpci_dev, Error **errp)
>      if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
>          return;
>      }
> -    object_property_set_link(OBJECT(vcrypto), "cryptodev",
> -                             OBJECT(vcrypto->vdev.conf.cryptodev), NULL);
>  }
>  
>  static void virtio_crypto_pci_class_init(ObjectClass *klass, void *data)
> diff --git a/hw/virtio/virtio-rng-pci.c b/hw/virtio/virtio-rng-pci.c
> index 2f0b529b62..8afbb4c209 100644
> --- a/hw/virtio/virtio-rng-pci.c
> +++ b/hw/virtio/virtio-rng-pci.c
> @@ -38,9 +38,6 @@ static void virtio_rng_pci_realize(VirtIOPCIProxy 
> *vpci_dev, Error **errp)
>      if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
>          return;
>      }
> -
> -    object_property_set_link(OBJECT(vrng), "rng", 
> OBJECT(vrng->vdev.conf.rng),
> -                             NULL);
>  }
>  
>  static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
> 




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