virtio: allow finalize_features to fail

This will make it easy for transports to validate features and return
failure.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 1fa5faa26440..7979f850e7ac 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -47,6 +47,7 @@
  *      vdev: the virtio_device
  *      This gives the final feature bits for the device: it can change
  *      the dev->feature bits if it wants.
+ *      Returns 0 on success or error status
  * @bus_name: return the bus name associated with the device
  *      vdev: the virtio_device
  *      This returns a pointer to the bus name a la pci_name from which
@@ -68,7 +69,7 @@ struct virtio_config_ops {
                         const char *names[]);
         void (*del_vqs)(struct virtio_device *);
         u64 (*get_features)(struct virtio_device *vdev);
-        void (*finalize_features)(struct virtio_device *vdev);
+        int (*finalize_features)(struct virtio_device *vdev);
         const char *(*bus_name)(struct virtio_device *vdev);
         int (*set_vq_affinity)(struct virtqueue *vq, int cpu);
 };