[PATCH v1] vhost: fix build

[zhoumin]

Ping.


On Mon, Aug 22, 2022 at 15:42, Min Zhou wrote:
> This patch fixes the following build failure seen on CentOS 8
> with gcc 12.1 because of uninitialized struct variable:
>
>    [..]
> ../lib/vhost/virtio_net.c:1159:18: warning: 'buf_vec[0].buf_addr' may be used uninitialized [-Wmaybe-uninitialized]
> 1159 |         buf_addr = buf_vec[vec_idx].buf_addr;
>       |         ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
>    [..]
>
> Fixes: 873e8dad6f49 ("vhost: support packed ring in async datapath")
>
> Signed-off-by: Min Zhou <zhoumin at loongson.cn>
> ---
>   lib/vhost/virtio_net.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
> index 35fa4670fd..4878bb2d8a 100644
> --- a/lib/vhost/virtio_net.c
> +++ b/lib/vhost/virtio_net.c
> @@ -1837,6 +1837,7 @@ virtio_dev_rx_async_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
>   {
>   	struct buf_vector buf_vec[BUF_VECTOR_MAX];
>   
> +	memset(buf_vec, 0, sizeof(buf_vec));
>   	if (unlikely(vhost_enqueue_async_packed(dev, vq, pkt, buf_vec,
>   					nr_descs, nr_buffers) < 0)) {
>   		VHOST_LOG_DATA(dev->ifname, DEBUG, "failed to get enough desc from vring\n");

-- 
Thanks,
Min Zhou