Date:   Wed, 8 Mar 2023 15:15:04 +0000
From:   Bobby Eshleman <bobbyeshleman@gmail.com>
To:     Arseniy Krasnov <avkrasnov@sberdevices.ru>
Cc:     Stefan Hajnoczi <stefanha@redhat.com>,
        Stefano Garzarella <sgarzare@redhat.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Bobby Eshleman <bobby.eshleman@bytedance.com>,
        kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel@sberdevices.ru, oxffffaa@gmail.com
Subject: Re: [PATCH RESEND net v4 2/4] virtio/vsock: remove redundant
 'skb_pull()' call
Message-ID: <ZAimeNvNmdFz2/ns@bullseye>
References: <1bfcb7fd-bce3-30cf-8a58-8baa57b7345c@sberdevices.ru>
 <75e3f51b-2848-d3ce-a995-4ac8320663f6@sberdevices.ru>
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In-Reply-To: <75e3f51b-2848-d3ce-a995-4ac8320663f6@sberdevices.ru>
Precedence: bulk

On Tue, Mar 14, 2023 at 02:06:53PM +0300, Arseniy Krasnov wrote:
> Since we now no longer use 'skb->len' to update credit, there is no sense
> to update skbuff state, because it is used only once after dequeue to
> copy data and then will be released.
> 
> Fixes: 71dc9ec9ac7d ("virtio/vsock: replace virtio_vsock_pkt with sk_buff")
> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
>  net/vmw_vsock/virtio_transport_common.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
> index 618680fd9906..9a411475e201 100644
> --- a/net/vmw_vsock/virtio_transport_common.c
> +++ b/net/vmw_vsock/virtio_transport_common.c
> @@ -465,7 +465,6 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk,
>  					dequeued_len = err;
>  				} else {
>  					user_buf_len -= bytes_to_copy;
> -					skb_pull(skb, bytes_to_copy);
>  				}
>  
>  				spin_lock_bh(&vvs->rx_lock);
> -- 
> 2.25.1

Acked-by: Bobby Eshleman <bobby.eshleman@bytedance.com>