diff --git a/hw/spapr.c b/hw/spapr.c
index 1265cee6d9f88834090e7aa6b41a7adbad62b12c..8cf93fe51e894e6f75ea82a5b9cc27c06bceda61 100644
--- a/hw/spapr.c
+++ b/hw/spapr.c
@@ -298,7 +298,6 @@ static void ppc_spapr_init(ram_addr_t ram_size,
     long kernel_size, initrd_size, fw_size;
     long pteg_shift = 17;
     char *filename;
-    int irq = 16;
 
     spapr = g_malloc(sizeof(*spapr));
     cpu_ppc_hypercall = emulate_spapr_hypercall;
@@ -360,15 +359,14 @@ static void ppc_spapr_init(ram_addr_t ram_size,
     /* Set up VIO bus */
     spapr->vio_bus = spapr_vio_bus_init();
 
-    for (i = 0; i < MAX_SERIAL_PORTS; i++, irq++) {
+    for (i = 0; i < MAX_SERIAL_PORTS; i++) {
         if (serial_hds[i]) {
             spapr_vty_create(spapr->vio_bus, SPAPR_VTY_BASE_ADDRESS + i,
-                             serial_hds[i], xics_find_qirq(spapr->icp, irq),
-                             irq);
+                             serial_hds[i]);
         }
     }
 
-    for (i = 0; i < nb_nics; i++, irq++) {
+    for (i = 0; i < nb_nics; i++) {
         NICInfo *nd = &nd_table[i];
 
         if (!nd->model) {
@@ -376,8 +374,7 @@ static void ppc_spapr_init(ram_addr_t ram_size,
         }
 
         if (strcmp(nd->model, "ibmveth") == 0) {
-            spapr_vlan_create(spapr->vio_bus, 0x1000 + i, nd,
-                              xics_find_qirq(spapr->icp, irq), irq);
+            spapr_vlan_create(spapr->vio_bus, 0x1000 + i, nd);
         } else {
             fprintf(stderr, "pSeries (sPAPR) platform does not support "
                     "NIC model '%s' (only ibmveth is supported)\n",
@@ -387,9 +384,7 @@ static void ppc_spapr_init(ram_addr_t ram_size,
     }
 
     for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
-        spapr_vscsi_create(spapr->vio_bus, 0x2000 + i,
-                           xics_find_qirq(spapr->icp, irq), irq);
-        irq++;
+        spapr_vscsi_create(spapr->vio_bus, 0x2000 + i);
     }
 
     if (kernel_filename) {
diff --git a/hw/spapr.h b/hw/spapr.h
index 263691b6fbb3d16b7d7b09b644b49abfd74a4cf9..009c459a146190a83f1e055b66c78774f413b5b5 100644
--- a/hw/spapr.h
+++ b/hw/spapr.h
@@ -1,6 +1,8 @@
 #if !defined(__HW_SPAPR_H__)
 #define __HW_SPAPR_H__
 
+#include "hw/xics.h"
+
 struct VIOsPAPRBus;
 struct icp_state;
 
@@ -278,6 +280,12 @@ void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn);
 target_ulong spapr_hypercall(CPUState *env, target_ulong opcode,
                              target_ulong *args);
 
+static inline qemu_irq spapr_find_qirq(sPAPREnvironment *spapr,
+                                        int irq_num)
+{
+    return xics_find_qirq(spapr->icp, irq_num);
+}
+
 static inline uint32_t rtas_ld(target_ulong phys, int n)
 {
     return ldl_be_phys(phys + 4*n);
diff --git a/hw/spapr_llan.c b/hw/spapr_llan.c
index c18efc7ee66ecb6f20fecd07d774597bc0aa66dd..2597748882c9d607ac94add3bb534408ea6ccc93 100644
--- a/hw/spapr_llan.c
+++ b/hw/spapr_llan.c
@@ -195,11 +195,9 @@ static int spapr_vlan_init(VIOsPAPRDevice *sdev)
     return 0;
 }
 
-void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd,
-                       qemu_irq qirq, uint32_t vio_irq_num)
+void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd)
 {
     DeviceState *dev;
-    VIOsPAPRDevice *sdev;
 
     dev = qdev_create(&bus->bus, "spapr-vlan");
     qdev_prop_set_uint32(dev, "reg", reg);
@@ -207,9 +205,6 @@ void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd,
     qdev_set_nic_properties(dev, nd);
 
     qdev_init_nofail(dev);
-    sdev = (VIOsPAPRDevice *)dev;
-    sdev->qirq = qirq;
-    sdev->vio_irq_num = vio_irq_num;
 }
 
 static int spapr_vlan_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c
index ce6558bb7ed258cac6d322365e494596b53551d4..ba2e1c178bceee74b35a9b145449c2e14fbb084c 100644
--- a/hw/spapr_vio.c
+++ b/hw/spapr_vio.c
@@ -32,6 +32,7 @@
 
 #include "hw/spapr.h"
 #include "hw/spapr_vio.h"
+#include "hw/xics.h"
 
 #ifdef CONFIG_FDT
 #include <libfdt.h>
@@ -595,6 +596,7 @@ static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo)
 {
     VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo;
     VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
+    VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
     char *id;
 
     if (asprintf(&id, "%s@%x", info->dt_name, dev->reg) < 0) {
@@ -602,6 +604,8 @@ static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo)
     }
 
     dev->qdev.id = id;
+    dev->vio_irq_num = bus->irq++;
+    dev->qirq = spapr_find_qirq(spapr, dev->vio_irq_num);
 
     rtce_init(dev);
 
@@ -656,6 +660,7 @@ VIOsPAPRBus *spapr_vio_bus_init(void)
 
     qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio");
     bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
+    bus->irq = 16;
 
     /* hcall-vio */
     spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
diff --git a/hw/spapr_vio.h b/hw/spapr_vio.h
index 603a8c43a38bce0c0fb60d950c110116d1114859..faa5d94d7ae9b58d9b6eb632bf42f3abe90453a8 100644
--- a/hw/spapr_vio.h
+++ b/hw/spapr_vio.h
@@ -62,6 +62,7 @@ typedef struct VIOsPAPRDevice {
 
 typedef struct VIOsPAPRBus {
     BusState bus;
+    int irq;
 } VIOsPAPRBus;
 
 typedef struct {
@@ -98,15 +99,9 @@ uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr);
 int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq);
 
 void vty_putchars(VIOsPAPRDevice *sdev, uint8_t *buf, int len);
-void spapr_vty_create(VIOsPAPRBus *bus,
-                      uint32_t reg, CharDriverState *chardev,
-                      qemu_irq qirq, uint32_t vio_irq_num);
-
-void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd,
-                       qemu_irq qirq, uint32_t vio_irq_num);
-
-void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
-                        qemu_irq qirq, uint32_t vio_irq_num);
+void spapr_vty_create(VIOsPAPRBus *bus, uint32_t reg, CharDriverState *chardev);
+void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd);
+void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg);
 
 int spapr_tce_set_bypass(uint32_t unit, uint32_t enable);
 void spapr_vio_quiesce(void);
diff --git a/hw/spapr_vscsi.c b/hw/spapr_vscsi.c
index fc9ac6ab50c8500ff8766d3d6896ce97cb6d3d0e..d2d041522f58927a312d7325d1ea74ddf7e46ffd 100644
--- a/hw/spapr_vscsi.c
+++ b/hw/spapr_vscsi.c
@@ -893,20 +893,14 @@ static int spapr_vscsi_init(VIOsPAPRDevice *dev)
     return 0;
 }
 
-void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
-                        qemu_irq qirq, uint32_t vio_irq_num)
+void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg)
 {
     DeviceState *dev;
-    VIOsPAPRDevice *sdev;
 
     dev = qdev_create(&bus->bus, "spapr-vscsi");
     qdev_prop_set_uint32(dev, "reg", reg);
 
     qdev_init_nofail(dev);
-
-    sdev = (VIOsPAPRDevice *)dev;
-    sdev->qirq = qirq;
-    sdev->vio_irq_num = vio_irq_num;
 }
 
 static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
diff --git a/hw/spapr_vty.c b/hw/spapr_vty.c
index f5046d918303592c5fb46f1d127ee86a871a4be8..607b81b5339d42a55a1c5bab4a1a74d4f30d6dd5 100644
--- a/hw/spapr_vty.c
+++ b/hw/spapr_vty.c
@@ -115,20 +115,14 @@ static target_ulong h_get_term_char(CPUState *env, sPAPREnvironment *spapr,
     return H_SUCCESS;
 }
 
-void spapr_vty_create(VIOsPAPRBus *bus,
-                      uint32_t reg, CharDriverState *chardev,
-                      qemu_irq qirq, uint32_t vio_irq_num)
+void spapr_vty_create(VIOsPAPRBus *bus, uint32_t reg, CharDriverState *chardev)
 {
     DeviceState *dev;
-    VIOsPAPRDevice *sdev;
 
     dev = qdev_create(&bus->bus, "spapr-vty");
     qdev_prop_set_uint32(dev, "reg", reg);
     qdev_prop_set_chr(dev, "chardev", chardev);
     qdev_init_nofail(dev);
-    sdev = (VIOsPAPRDevice *)dev;
-    sdev->qirq = qirq;
-    sdev->vio_irq_num = vio_irq_num;
 }
 
 static void vty_hcalls(VIOsPAPRBus *bus)