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, 12 insertions, 7 deletions

diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index 3a7285f..5dde0e7 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -163,16 +163,21 @@ static const MemoryRegionOps pcspk_io_ops = {
     },
 };
 
-static int pcspk_initfn(ISADevice *dev)
+static void pcspk_initfn(Object *obj)
 {
-    PCSpkState *s = PC_SPEAKER(dev);
+    PCSpkState *s = PC_SPEAKER(obj);
 
     memory_region_init_io(&s->ioport, &pcspk_io_ops, s, "elcr", 1);
-    isa_register_ioport(dev, &s->ioport, s->iobase);
+}
 
-    pcspk_state = s;
+static void pcspk_realizefn(DeviceState *dev, Error **errp)
+{
+    ISADevice *isadev = ISA_DEVICE(dev);
+    PCSpkState *s = PC_SPEAKER(dev);
 
-    return 0;
+    isa_register_ioport(isadev, &s->ioport, s->iobase);
+
+    pcspk_state = s;
 }
 
 static Property pcspk_properties[] = {
@@ -184,9 +189,8 @@ static Property pcspk_properties[] = {
 static void pcspk_class_initfn(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
-    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
 
-    ic->init = pcspk_initfn;
+    dc->realize = pcspk_realizefn;
     dc->no_user = 1;
     dc->props = pcspk_properties;
 }
@@ -195,6 +199,7 @@ static const TypeInfo pcspk_info = {
     .name           = TYPE_PC_SPEAKER,
     .parent         = TYPE_ISA_DEVICE,
     .instance_size  = sizeof(PCSpkState),
+    .instance_init  = pcspk_initfn,
     .class_init     = pcspk_class_initfn,
 };