fix staticcheck failures of pkg/util/ipconfig pkg/util/iptables pkg/util/ipvs/testing

hack/.staticcheck_failures

@@ -20,9 +20,6 @@ pkg/registry/core/service/ipallocator
 pkg/registry/core/service/portallocator
 pkg/registry/core/service/storage
 pkg/util/coverage
-pkg/util/ipconfig
-pkg/util/iptables
-pkg/util/ipvs/testing
 pkg/util/netsh
 pkg/volume
 pkg/volume/awsebs

pkg/util/ipconfig/ipconfig.go

@@ -19,7 +19,6 @@ package ipconfig
 import (
 	"runtime"
 	"strings"
-	"sync"
 
 	"k8s.io/klog"
 
@@ -42,7 +41,6 @@ const (
 
 // runner implements Interface in terms of exec("ipconfig").
 type runner struct {
-	mu   sync.Mutex
 	exec utilexec.Interface
 }
 

pkg/util/iptables/iptables.go

@@ -432,7 +432,7 @@ func iptablesCommand(protocol Protocol) string {
 }
 
 func (runner *runner) run(op operation, args []string) ([]byte, error) {
-	return runner.runContext(nil, op, args)
+	return runner.runContext(context.TODO(), op, args)
 }
 
 func (runner *runner) runContext(ctx context.Context, op operation, args []string) ([]byte, error) {

pkg/util/ipvs/testing/fake_test.go

@@ -58,6 +58,9 @@ func TestVirtualServer(t *testing.T) {
 	}
 	// Check the updated virtual server
 	got12, err := fake.GetVirtualServer(vs1)
+	if err != nil {
+		t.Errorf("Fail to get virtual server, error: %v", err)
+	}
 	if !got12.Equal(vs12) {
 		t.Errorf("Expect virtual server: %v, got: %v", vs12, got12)
 	}