k8s-rdma-sriov-dev-plugin: Daemonset logs says `Link not found`

I have followed the README to create configmap and daemonset, but it seems like the device plugin does not work correctly:

# kubectl logs xxxxx -n kube-system
2018/10/17 08:13:49 Reading /k8s-rdma-sriov-dev-plugin/config.json
2018/10/17 08:13:49 loaded config:  {"mode":"sriov","pfNetdevices":["enp97s0f0","enp97s0f1","enp97s0f2","enp97s0f3"]}
2018/10/17 08:13:49 sriov device mode
Configuring SRIOV on ndev= enp97s0f0 9
max_vfs =  32
cur_vfs =  0
vf = &{10 virtfn10 false false}
Fail to config vfs for ndev = enp97s0f0
Fail to configure sriov; error =  Link not found
Configuring SRIOV on ndev= enp97s0f1 9
max_vfs =  32
cur_vfs =  0
vf = &{10 virtfn10 false false}
Fail to config vfs for ndev = enp97s0f1
Fail to configure sriov; error =  Link not found
Configuring SRIOV on ndev= enp97s0f2 9
max_vfs =  32
cur_vfs =  0
vf = &{10 virtfn10 false false}
Fail to config vfs for ndev = enp97s0f2
Fail to configure sriov; error =  Link not found
Configuring SRIOV on ndev= enp97s0f3 9
max_vfs =  32
cur_vfs =  0
vf = &{10 virtfn10 false false}
Fail to config vfs for ndev = enp97s0f3
Fail to configure sriov; error =  Link not found

Server Version: version.Info{Major:"1", Minor:"10+", GitVersion:"v1.10.7-3+18f677ae060806", GitCommit:"18f677ae0608064799c7e7f2bc2732d37f22efe3", GitTreeState:"clean", BuildDate:"2018-10-16T12:37:20Z", GoVersion:"go1.11.1", Compiler:"gc", Platform:"linux/amd64"}