virtio: make set_features() void

Signed-off-by: Zhi Yong Wu <zwu.kernel@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>

drivers/virtio.cc

@@ -53,7 +53,7 @@ virtio_driver::~virtio_driver()
     free_queues();
 }
 
-bool virtio_driver::setup_features()
+void virtio_driver::setup_features()
 {
     u32 dev_features = get_device_features();
     u32 drv_features = this->get_driver_features();
@@ -73,9 +73,6 @@ bool virtio_driver::setup_features()
             set_event_idx_cap(true);
 
     set_guest_features(subset);
-
-    return subset != 0;
-
 }
 
 void virtio_driver::dump_config()

drivers/virtio.hh

@@ -165,7 +165,7 @@ public:
 protected:
     // Actual drivers should implement this on top of the basic ring features
     virtual u32 get_driver_features() { return 1 << VIRTIO_RING_F_INDIRECT_DESC | 1 << VIRTIO_RING_F_EVENT_IDX; }
-    bool setup_features();
+    void setup_features();
 protected:
     pci::device& _dev;
     interrupt_manager _msi;