isa: Use realizefn for ISADevice

Drop ISADeviceClass::init and the resulting no-op initfn and let
children implement their own realizefn. Adapt error handling.
Split off an instance_init where sensible.

Signed-off-by: Andreas Färber <afaerber@suse.de>

1 files changed, 13 insertions, 6 deletions

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 4844a6b370..e9c91e44a1 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -522,23 +522,29 @@ static const MemoryRegionOps port92_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-static int port92_initfn(ISADevice *dev)
+static void port92_initfn(Object *obj)
 {
-    Port92State *s = PORT92(dev);
+    Port92State *s = PORT92(obj);
 
     memory_region_init_io(&s->io, &port92_ops, s, "port92", 1);
-    isa_register_ioport(dev, &s->io, 0x92);
 
     s->outport = 0;
-    return 0;
+}
+
+static void port92_realizefn(DeviceState *dev, Error **errp)
+{
+    ISADevice *isadev = ISA_DEVICE(dev);
+    Port92State *s = PORT92(dev);
+
+    isa_register_ioport(isadev, &s->io, 0x92);
 }
 
 static void port92_class_initfn(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
-    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
-    ic->init = port92_initfn;
+
     dc->no_user = 1;
+    dc->realize = port92_realizefn;
     dc->reset = port92_reset;
     dc->vmsd = &vmstate_port92_isa;
 }
@@ -547,6 +553,7 @@ static const TypeInfo port92_info = {
     .name          = TYPE_PORT92,
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(Port92State),
+    .instance_init = port92_initfn,
     .class_init    = port92_class_initfn,
 };