On 2020/10/19 下午5:07, we...@ucloud.cn wrote:
From: wenxu <we...@ucloud.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 <we...@ucloud.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 <jasow...@redhat.com>


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