[RFC PATCH 04/11] hw/ide/via: Set the ISA-bus QOM link

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Set the ISA Bus link property on the VIA IDE object from the
two unique users, the Fuloong and Pegasos machines.

Add a check in via_ide_realize() to be sure this property is set.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/ide/via.c        | 5 +++++
 hw/mips/fuloong2e.c | 4 ++++
 hw/ppc/pegasos2.c   | 4 ++++
 3 files changed, 13 insertions(+)

diff --git a/hw/ide/via.c b/hw/ide/via.c
index 65fdca6dcf4..654e15edfed 100644
--- a/hw/ide/via.c
+++ b/hw/ide/via.c
@@ -165,6 +165,11 @@ static void via_ide_realize(PCIDevice *dev, Error **errp)
     uint8_t *pci_conf = dev->config;
     int i;
 
+    if (!d->isa_bus) {
+        error_setg(errp, "via-ide: 'isa-bus' link not set");
+        return;
+    }
+
     pci_config_set_prog_interface(pci_conf, 0x8a); /* legacy mode */
     pci_set_long(pci_conf + PCI_CAPABILITY_LIST, 0x000000c0);
     dev->wmask[PCI_INTERRUPT_LINE] = 0;
diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index 40e9a645e1b..7e644a701bc 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -201,12 +201,16 @@ static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
                                        I2CBus **i2c_bus)
 {
     PCIDevice *dev;
+    BusState *isa_bus;
 
     dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true,
                                           TYPE_VT82C686B_ISA);
+    isa_bus = qdev_get_child_bus(DEVICE(dev), "isa.0");
     qdev_connect_gpio_out(DEVICE(dev), 0, intc);
 
     dev = pci_new(PCI_DEVFN(slot, 1), "via-ide");
+    object_property_set_link(OBJECT(dev), "isa-bus",
+                             OBJECT(isa_bus), &error_abort);
     pci_realize_and_unref(dev, pci_bus, &error_abort);
     pci_ide_create_devs(dev);
 
diff --git a/hw/ppc/pegasos2.c b/hw/ppc/pegasos2.c
index 8486a2eb8c6..ed6ddc3569b 100644
--- a/hw/ppc/pegasos2.c
+++ b/hw/ppc/pegasos2.c
@@ -57,6 +57,7 @@ static void pegasos2_init(MachineState *machine)
     PCIBus *pci_bus;
     PCIDevice *dev;
     I2CBus *i2c_bus;
+    BusState *isa_bus;
     const char *fwname = machine->firmware ?: PROM_FILENAME;
     char *filename;
     int sz;
@@ -104,11 +105,14 @@ static void pegasos2_init(MachineState *machine)
     /* VT8231 function 0: PCI-to-ISA Bridge */
     dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(12, 0), true,
                                           TYPE_VT8231_ISA);
+    isa_bus = qdev_get_child_bus(DEVICE(dev), "isa.0");
     qdev_connect_gpio_out(DEVICE(dev), 0,
                           qdev_get_gpio_in_named(mv, "gpp", 31));
 
     /* VT8231 function 1: IDE Controller */
     dev = pci_new(PCI_DEVFN(12, 1), "via-ide");
+    object_property_set_link(OBJECT(dev), "isa-bus",
+                             OBJECT(isa_bus), &error_abort);
     pci_realize_and_unref(dev, pci_bus, &error_abort);
     pci_ide_create_devs(dev);
 
-- 
2.26.3