netdev - Re: [PATCH v13 17/42] virtio_ring: packed: introduce vring_free

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Date:   Wed, 27 Jul 2022 12:24:21 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        virtualization@...ts.linux-foundation.org
Cc:     Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Vadim Pasternak <vadimp@...dia.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Eric Farman <farman@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Vincent Whitchurch <vincent.whitchurch@...s.com>,
        linux-um@...ts.infradead.org, netdev@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org, bpf@...r.kernel.org,
        kangjie.xu@...ux.alibaba.com
Subject: Re: [PATCH v13 17/42] virtio_ring: packed: introduce
 vring_free_packed


在 2022/7/26 15:22, Xuan Zhuo 写道:
> Free the structure struct vring_vritqueue_packed.
>
> Subsequent patches require it.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>


Acked-by: Jason Wang <jasowang@...hat.com>


> ---
>   drivers/virtio/virtio_ring.c | 22 ++++++++++++++++++++++
>   1 file changed, 22 insertions(+)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 58355e1ac7d7..891900b31c3d 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -1835,6 +1835,28 @@ static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num)
>   	return desc_extra;
>   }
>   
> +static void vring_free_packed(struct vring_virtqueue_packed *vring_packed,
> +			      struct virtio_device *vdev)
> +{
> +	if (vring_packed->vring.desc)
> +		vring_free_queue(vdev, vring_packed->ring_size_in_bytes,
> +				 vring_packed->vring.desc,
> +				 vring_packed->ring_dma_addr);
> +
> +	if (vring_packed->vring.driver)
> +		vring_free_queue(vdev, vring_packed->event_size_in_bytes,
> +				 vring_packed->vring.driver,
> +				 vring_packed->driver_event_dma_addr);
> +
> +	if (vring_packed->vring.device)
> +		vring_free_queue(vdev, vring_packed->event_size_in_bytes,
> +				 vring_packed->vring.device,
> +				 vring_packed->device_event_dma_addr);
> +
> +	kfree(vring_packed->desc_state);
> +	kfree(vring_packed->desc_extra);
> +}
> +
>   static struct virtqueue *vring_create_virtqueue_packed(
>   	unsigned int index,
>   	unsigned int num,