netdev - Re: [PATCH v3 3/4] vsock: add pkt cancel capability

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Date:   Fri, 9 Dec 2016 10:16:09 +0000
From:   Stefan Hajnoczi <stefanha@...il.com>
To:     Peng Tao <bergwolf@...il.com>
Cc:     Stefan Hajnoczi <stefanha@...hat.com>, netdev@...r.kernel.org,
        Jorgen Hansen <jhansen@...are.com>,
        David Miller <davem@...emloft.net>, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v3 3/4] vsock: add pkt cancel capability

On Fri, Dec 09, 2016 at 01:12:35AM +0800, Peng Tao wrote:
> Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>
> Signed-off-by: Peng Tao <bergwolf@...il.com>
> ---
>  net/vmw_vsock/virtio_transport.c | 42 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 42 insertions(+)
> 
> diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
> index 936d7ee..95c1162 100644
> --- a/net/vmw_vsock/virtio_transport.c
> +++ b/net/vmw_vsock/virtio_transport.c
> @@ -170,6 +170,47 @@ virtio_transport_send_pkt(struct virtio_vsock_pkt *pkt)
>  	return len;
>  }
>  
> +static int
> +virtio_transport_cancel_pkt(struct vsock_sock *vsk)
> +{
> +	struct virtio_vsock *vsock;
> +	struct virtio_vsock_pkt *pkt, *n;
> +	int cnt = 0;
> +	LIST_HEAD(freeme);
> +
> +	vsock = virtio_vsock_get();
> +	if (!vsock) {
> +		return -ENODEV;
> +	}
> +
> +	spin_lock_bh(&vsock->send_pkt_list_lock);
> +	list_for_each_entry_safe(pkt, n, &vsock->send_pkt_list, list) {
> +		if (pkt->cancel_token != (void *)vsk)

The cast is unnecessary here.

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