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

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Date:   Tue, 20 Oct 2020 10:03:00 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     wenxu@...oud.cn, netdev@...r.kernel.org, eli@...lanox.com
Subject: Re: [PATCH net] vdpa/mlx5: Fix miss to set VIRTIO_NET_S_LINK_UP for
 virtio_net_config


On 2020/10/19 下午5:07, 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")
> 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;
>   }
>   


Other than the small issue pointed out by Jakub.

Acked-by: Jason Wang <jasowang@...hat.com>