diff --git a/hw/usb/hcd-ehci-pci.c b/hw/usb/hcd-ehci-pci.c
index f1b5f5d29cfad624b7fa21bf9d76ee24a3394b21..b352f733018d71b78383f87084145f05e4463d92 100644
--- a/hw/usb/hcd-ehci-pci.c
+++ b/hw/usb/hcd-ehci-pci.c
@@ -68,7 +68,7 @@ static int usb_ehci_pci_initfn(PCIDevice *dev)
     s->capsbase = 0x00;
     s->opregbase = 0x20;
 
-    usb_ehci_initfn(s, DEVICE(dev));
+    usb_ehci_realize(s, DEVICE(dev), NULL);
     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mem);
 
     return 0;
diff --git a/hw/usb/hcd-ehci-sysbus.c b/hw/usb/hcd-ehci-sysbus.c
index f9e4fd3474ef8286f65466c95f69b9d2d3810523..3179e6fe552a2db3f5fa8e46c1263b9420851a0e 100644
--- a/hw/usb/hcd-ehci-sysbus.c
+++ b/hw/usb/hcd-ehci-sysbus.c
@@ -32,8 +32,9 @@ static Property ehci_sysbus_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
-static int usb_ehci_sysbus_initfn(SysBusDevice *dev)
+static void usb_ehci_sysbus_realize(DeviceState *dev, Error **errp)
 {
+    SysBusDevice *d = SYS_BUS_DEVICE(dev);
     EHCISysBusState *i = SYS_BUS_EHCI(dev);
     SysBusEHCIClass *sec = SYS_BUS_EHCI_GET_CLASS(dev);
     EHCIState *s = &i->ehci;
@@ -42,18 +43,16 @@ static int usb_ehci_sysbus_initfn(SysBusDevice *dev)
     s->opregbase = sec->opregbase;
     s->as = &address_space_memory;
 
-    usb_ehci_initfn(s, DEVICE(dev));
-    sysbus_init_irq(dev, &s->irq);
-    sysbus_init_mmio(dev, &s->mem);
-    return 0;
+    usb_ehci_realize(s, dev, errp);
+    sysbus_init_irq(d, &s->irq);
+    sysbus_init_mmio(d, &s->mem);
 }
 
 static void ehci_sysbus_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 
-    k->init = usb_ehci_sysbus_initfn;
+    dc->realize = usb_ehci_sysbus_realize;
     dc->vmsd = &vmstate_ehci_sysbus;
     dc->props = ehci_sysbus_properties;
 }
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 1ad215931e2266065aaeb80707bdc6995eeec3e1..ea0379b0d2d57394ad5526cf897ef6943604033a 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -2508,7 +2508,7 @@ const VMStateDescription vmstate_ehci = {
     }
 };
 
-void usb_ehci_initfn(EHCIState *s, DeviceState *dev)
+void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp)
 {
     int i;
 
diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h
index 2fcb92f12bc61ecb18a6af556a3c91f39419caa7..15c76304d35796a7139f460cb54cc9ba4d81e980 100644
--- a/hw/usb/hcd-ehci.h
+++ b/hw/usb/hcd-ehci.h
@@ -322,7 +322,7 @@ struct EHCIState {
 
 extern const VMStateDescription vmstate_ehci;
 
-void usb_ehci_initfn(EHCIState *s, DeviceState *dev);
+void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp);
 
 #define TYPE_PCI_EHCI "pci-ehci-usb"
 #define PCI_EHCI(obj) OBJECT_CHECK(EHCIPCIState, (obj), TYPE_PCI_EHCI)