netdev - Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for virtio_net

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Date:   Mon, 19 Oct 2020 15:02:54 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     wenxu@...oud.cn
Cc:     eli@...lanox.com, netdev@...r.kernel.org, jasowang@...hat.com,
        parav@...lanox.com, virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for
 virtio_net_config

On Mon, 19 Oct 2020 22:17:07 +0800 wenxu@...oud.cn wrote:
> From: wenxu <wenxu@...oud.cn>
> 
> Qemu get virtio_net_config from the vdpa driver. So The vdpa driver
> should set the VIRTIO_NET_S_LINK_UP flag to virtio_net_config like
> vdpa_sim. Or the link of virtio net NIC in the virtual machine will
> never up.
> 
> Fixes:1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")

        ^ missing space

Please keep CCing netdev on future submissions, but the vdpa patches
actually go through Michael's tree, so make sure to CC
virtualization@...ts.linux-foundation.org

> Signed-off-by: wenxu <wenxu@...oud.cn>
> ---
>  drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index 74264e59..af6c74c 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -1537,6 +1537,8 @@ static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
>  	ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features;
>  	ndev->config.mtu = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
>  					     ndev->mtu);
> +	ndev->config.status = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
> +					       VIRTIO_NET_S_LINK_UP);
>  	return err;
>  }
>