diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index c349644..84f72b0 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -131,12 +131,12 @@
     }
 }
 
-static int pci_piix_ide_initfn(PCIIDEState *d)
+static int pci_piix_ide_initfn(PCIDevice *dev)
 {
+    PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
     uint8_t *pci_conf = d->dev.config;
 
     pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode
-    pci_config_set_class(pci_conf, PCI_CLASS_STORAGE_IDE);
 
     qemu_register_reset(piix3_reset, d);
 
@@ -149,24 +149,6 @@
     return 0;
 }
 
-static int pci_piix3_ide_initfn(PCIDevice *dev)
-{
-    PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
-
-    pci_config_set_vendor_id(d->dev.config, PCI_VENDOR_ID_INTEL);
-    pci_config_set_device_id(d->dev.config, PCI_DEVICE_ID_INTEL_82371SB_1);
-    return pci_piix_ide_initfn(d);
-}
-
-static int pci_piix4_ide_initfn(PCIDevice *dev)
-{
-    PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
-
-    pci_config_set_vendor_id(d->dev.config, PCI_VENDOR_ID_INTEL);
-    pci_config_set_device_id(d->dev.config, PCI_DEVICE_ID_INTEL_82371AB);
-    return pci_piix_ide_initfn(d);
-}
-
 /* hd_table must contain 4 block drivers */
 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
 PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
@@ -195,13 +177,19 @@
         .qdev.size    = sizeof(PCIIDEState),
         .qdev.no_user = 1,
         .no_hotplug   = 1,
-        .init         = pci_piix3_ide_initfn,
+        .init         = pci_piix_ide_initfn,
+        .vendor_id    = PCI_VENDOR_ID_INTEL,
+        .device_id    = PCI_DEVICE_ID_INTEL_82371SB_1,
+        .class_id     = PCI_CLASS_STORAGE_IDE,
     },{
         .qdev.name    = "piix4-ide",
         .qdev.size    = sizeof(PCIIDEState),
         .qdev.no_user = 1,
         .no_hotplug   = 1,
-        .init         = pci_piix4_ide_initfn,
+        .init         = pci_piix_ide_initfn,
+        .vendor_id    = PCI_VENDOR_ID_INTEL,
+        .device_id    = PCI_DEVICE_ID_INTEL_82371AB,
+        .class_id     = PCI_CLASS_STORAGE_IDE,
     },{
         /* end of list */
     }