linux-kernel - Re: [RFC PATCH net-next v1 1/4] vsock/virtio: use skb_frag

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Message-ID: <ecf4ec04-4ed6-483c-8ffe-1fc319ee6aa4@kernel.org>
Date:   Wed, 13 Dec 2023 22:27:40 -0800
From:   David Ahern <dsahern@...nel.org>
To:     Mina Almasry <almasrymina@...gle.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
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Subject: Re: [RFC PATCH net-next v1 1/4] vsock/virtio: use skb_frag_page()
 helper

On 12/13/23 7:05 PM, Mina Almasry wrote:
> diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
> index af5bab1acee1..bd0b413dfa3f 100644
> --- a/net/vmw_vsock/virtio_transport.c
> +++ b/net/vmw_vsock/virtio_transport.c
> @@ -153,7 +153,7 @@ virtio_transport_send_pkt_work(struct work_struct *work)
>  				 * 'virt_to_phys()' later to fill the buffer descriptor.
>  				 * We don't touch memory at "virtual" address of this page.
>  				 */
> -				va = page_to_virt(skb_frag->bv_page);
> +				va = page_to_virt(skb_frag_page(skb_frag));
>  				sg_init_one(sgs[out_sg],
>  					    va + skb_frag->bv_offset,

offset should not be open coded either.

>  					    skb_frag->bv_len);