Fix the driver name empty case

As drivername maybe "" in hostconfig, so we should not
directly print dirvername with var drivername,
instead, we use the real driver name property to print it.

Fixes: #20900
Signed-off-by: Kai Qiang Wu(Kennan) <wkqwu@cn.ibm.com>
Upstream-commit: 6c78edaf7f22bfe3bd731855f767b9fa3c7d8549
Component: engine

components/engine/volume/store/store.go

@@ -194,12 +194,14 @@ func (s *VolumeStore) create(name, driverName string, opts map[string]string) (v
 		}
 	}
 
-	logrus.Debugf("Registering new volume reference: driver %q, name %q", driverName, name)
 	vd, err := volumedrivers.GetDriver(driverName)
+
 	if err != nil {
 		return nil, &OpErr{Op: "create", Name: name, Err: err}
 	}
 
+	logrus.Debugf("Registering new volume reference: driver %q, name %q", vd.Name(), name)
+
 	if v, _ := vd.Get(name); v != nil {
 		return v, nil
 	}