virtio: cull virtio_bus_set_vdev_features

The only user of this function was virtio-ccw, and it should use
virtio_set_features() like everybody else: We need to make sure
that bad features are masked out properly, which this function did
not do.
Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/s390x/virtio-ccw.c

@@ -400,8 +400,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
                                        ccw.cda + sizeof(features.features));
             features.features = ldl_le_phys(&address_space_memory, ccw.cda);
             if (features.index < ARRAY_SIZE(dev->host_features)) {
-                virtio_bus_set_vdev_features(&dev->bus, features.features);
-                vdev->guest_features = features.features;
+                virtio_set_features(vdev, features.features);
             } else {
                 /*
                  * If the guest supports more feature bits, assert that it

hw/virtio/virtio-bus.c

@@ -109,20 +109,6 @@ uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
     return k->get_features(vdev, requested_features);
 }
 
-/* Set the features of the plugged device. */
-void virtio_bus_set_vdev_features(VirtioBusState *bus,
-                                      uint32_t requested_features)
-{
-    VirtIODevice *vdev = virtio_bus_get_device(bus);
-    VirtioDeviceClass *k;
-
-    assert(vdev != NULL);
-    k = VIRTIO_DEVICE_GET_CLASS(vdev);
-    if (k->set_features != NULL) {
-        k->set_features(vdev, requested_features);
-    }
-}
-
 /* Get bad features of the plugged device. */
 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
 {

include/hw/virtio/virtio-bus.h

@@ -84,9 +84,6 @@ size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
 /* Get the features of the plugged device. */
 uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
                                     uint32_t requested_features);
-/* Set the features of the plugged device. */
-void virtio_bus_set_vdev_features(VirtioBusState *bus,
-                                  uint32_t requested_features);
 /* Get bad features of the plugged device. */
 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
 /* Get config of the plugged device. */