ide_init_ioport() takes an ISADevice* parameter which eventually gets passed
to isa_address_space_io(). Unfortunately, there is no ISADevice in hw/ide/
piix, so NULL gets passed instead. This causes isa_address_space_io() to
resort to using the isabus global - which we want to get rid of.

To resolve this, observe that hw/isa/piix* models pass PCI's IO address
space to ISA which can be used instead. The next patch therefore introduces
pci_ide_init_ioport() which takes a PCIDevice* parameter instead and is
available in hw/ide/piix.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
---
 hw/ide/ioport.c           | 2 +-
 hw/ide/isa.c              | 2 +-
 hw/ide/piix.c             | 4 ++--
 include/hw/ide/internal.h | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/ide/ioport.c b/hw/ide/ioport.c
index b613ff3bba..ed1f34f573 100644
--- a/hw/ide/ioport.c
+++ b/hw/ide/ioport.c
@@ -50,7 +50,7 @@ static const MemoryRegionPortio ide_portio2_list[] = {
     PORTIO_END_OF_LIST(),
 };
 
-void ide_init_ioport(IDEBus *bus, ISADevice *dev, int iobase, int iobase2)
+void isa_ide_init_ioport(IDEBus *bus, ISADevice *dev, int iobase, int iobase2)
 {
     /* ??? Assume only ISA and PCI configurations, and that the PCI-ISA
        bridge has been setup properly to always register with ISA.  */
diff --git a/hw/ide/isa.c b/hw/ide/isa.c
index 8bedbd13f1..79ed33aefa 100644
--- a/hw/ide/isa.c
+++ b/hw/ide/isa.c
@@ -74,7 +74,7 @@ static void isa_ide_realizefn(DeviceState *dev, Error **errp)
     ISAIDEState *s = ISA_IDE(dev);
 
     ide_bus_init(&s->bus, sizeof(s->bus), dev, 0, 2);
-    ide_init_ioport(&s->bus, isadev, s->iobase, s->iobase2);
+    isa_ide_init_ioport(&s->bus, isadev, s->iobase, s->iobase2);
     s->irq = isa_get_irq(isadev, s->isairq);
     ide_init2(&s->bus, s->irq);
     vmstate_register(VMSTATE_IF(dev), 0, &vmstate_ide_isa, s);
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index fbf2756b47..312611c61f 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -161,8 +161,8 @@ static int pci_piix_init_ports(PCIIDEState *d)
 
     for (i = 0; i < 2; i++) {
         ide_bus_init(&d->bus[i], sizeof(d->bus[i]), dev, i, 2);
-        ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
-                        port_info[i].iobase2);
+        isa_ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
+                            port_info[i].iobase2);
         ide_init2(&d->bus[i], qdev_get_gpio_in(dev, i));
 
         bmdma_init(&d->bus[i], &d->bmdma[i], d);
diff --git a/include/hw/ide/internal.h b/include/hw/ide/internal.h
index 348e7f2510..86ecc04ce4 100644
--- a/include/hw/ide/internal.h
+++ b/include/hw/ide/internal.h
@@ -624,7 +624,7 @@ int ide_init_drive(IDEState *s, BlockBackend *blk, IDEDriveKind kind,
                    int chs_trans, Error **errp);
 void ide_init2(IDEBus *bus, qemu_irq irq);
 void ide_exit(IDEState *s);
-void ide_init_ioport(IDEBus *bus, ISADevice *isa, int iobase, int iobase2);
+void isa_ide_init_ioport(IDEBus *bus, ISADevice *isa, int iobase, int iobase2);
 void ide_register_restart_cb(IDEBus *bus);
 
 void ide_exec_cmd(IDEBus *bus, uint32_t val);
-- 
2.36.1