[Qemu-devel] [PATCH v3 1/5] sysbus: make SysBusDeviceClass::init optional

[Peter Maydell]

Make the SysBusDeviceClass::init optional, for devices which
genuinely don't need to do anything here. In particular, simple
devices which can do all their initialization in their
instance_init method don't need either a DeviceClass::realize
or SysBusDeviceClass::init method.

Signed-off-by: Peter Maydell <address@hidden>
Acked-by: Andreas Färber <address@hidden>
Reviewed-by: Peter Crosthwaite <address@hidden>
---
 hw/sysbus.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/sysbus.c b/hw/sysbus.c
index 702fc72..9a19468 100644
--- a/hw/sysbus.c
+++ b/hw/sysbus.c
@@ -137,6 +137,9 @@ static int sysbus_device_init(DeviceState *dev)
     SysBusDevice *sd = SYS_BUS_DEVICE(dev);
     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
 
+    if (!sbc->init) {
+        return 0;
+    }
     return sbc->init(sd);
 }
 
-- 
1.7.9.5