[PATCH] hw/ppc/mac_newworld: Check for the availability of pci-ohci before using it

[Thomas Huth]

pci-ohci might habe been disabled in the QEMU binary (e.g. when "configure"
has been run with "--without-default-devices"). Thus we should check
for its availability before blindly using it.

Signed-off-by: Thomas Huth <th...@redhat.com>
---
 hw/ppc/mac_newworld.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 535710314a..c7cca430e1 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -349,7 +349,8 @@ static void ppc_core99_init(MachineState *machine)
                                     sysbus_mmio_get_region(s, 3));
     }
 
-    machine->usb |= defaults_enabled() && !machine->usb_disabled;
+    machine->usb |= defaults_enabled() && !machine->usb_disabled &&
+                    module_object_class_by_name("pci-ohci") != 0;
     has_pmu = (core99_machine->via_config != CORE99_VIA_CONFIG_CUDA);
     has_adb = (core99_machine->via_config == CORE99_VIA_CONFIG_CUDA ||
                core99_machine->via_config == CORE99_VIA_CONFIG_PMU_ADB);
-- 
2.31.1