Chen Qun <kuhn.chen...@huawei.com> 于2020年8月25日周二 下午7:32写道：
>
> Clang static code analyzer show warning:
> hw/net/virtio-net.c:2077:5: warning: Value stored to 'tcp_flag' is never read
> tcp_flag &= VIRTIO_NET_TCP_FLAG;
> ^ ~~~~~~~~~~~~~~~~~~~
>
> The 'VIRTIO_NET_TCP_FLAG' is '0x3F'. The last ‘tcp_flag’ assignment statement
> is
> the same as that of the first two statements.
>
> Reported-by: Euler Robot <euler.ro...@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chen...@huawei.com>
> Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Reviewed-by: Li Qiang <liq...@gmail.com>
> ---
> Cc: "Michael S. Tsirkin" <m...@redhat.com>
> Cc: Jason Wang <jasow...@redhat.com>
> ---
> hw/net/virtio-net.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
> index a1fe9e9285..cb0d27084c 100644
> --- a/hw/net/virtio-net.c
> +++ b/hw/net/virtio-net.c
> @@ -2075,7 +2075,6 @@ static int
> virtio_net_rsc_tcp_ctrl_check(VirtioNetRscChain *chain,
> tcp_flag = htons(tcp->th_offset_flags);
> tcp_hdr = (tcp_flag & VIRTIO_NET_TCP_HDR_LENGTH) >> 10;
> tcp_flag &= VIRTIO_NET_TCP_FLAG;
> - tcp_flag = htons(tcp->th_offset_flags) & 0x3F;
> if (tcp_flag & TH_SYN) {
> chain->stat.tcp_syn++;
> return RSC_BYPASS;
> --
> 2.23.0
>
>
