[PATCH 05/10] hppa: do not require CONFIG_USB

[Paolo Bonzini <pbonzini@redhat.com>]

With --without-default-devices it is possible to build a binary that
does not include any USB host controller and therefore that does not
include the code guarded by CONFIG_USB.  While the simpler creation
functions such as usb_create_simple can be inlined, this is not true
of usb_bus_find().  Remove it, replacing it with a search of the single
USB bus on the machine.

Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/hppa/machine.c | 7 ++++---
 hw/hppa/Kconfig   | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index 5fcaf5884be..11982d5776c 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -396,10 +396,11 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     }
 
     /* create USB OHCI controller for USB keyboard & mouse on Astro machines */
-    if (!lasi_dev && machine->enable_graphics) {
+    if (!lasi_dev && machine->enable_graphics && defaults_enabled()) {
         pci_create_simple(pci_bus, -1, "pci-ohci");
-        usb_create_simple(usb_bus_find(-1), "usb-kbd");
-        usb_create_simple(usb_bus_find(-1), "usb-mouse");
+        Object *usb_bus = object_resolve_type_unambiguous(TYPE_USB_BUS, &error_abort);
+        usb_create_simple(USB_BUS(usb_bus), "usb-kbd");
+        usb_create_simple(USB_BUS(usb_bus), "usb-mouse");
     }
 
     /* register power switch emulation */
diff --git a/hw/hppa/Kconfig b/hw/hppa/Kconfig
index dff5df7f725..ee7ffd2bfb5 100644
--- a/hw/hppa/Kconfig
+++ b/hw/hppa/Kconfig
@@ -2,6 +2,7 @@ config HPPA_B160L
     bool
     imply PCI_DEVICES
     imply E1000_PCI
+    imply USB_OHCI_PCI
     imply VIRTIO_VGA
     select ASTRO
     select DINO
@@ -17,4 +18,3 @@ config HPPA_B160L
     select LASIPS2
     select PARALLEL
     select ARTIST
-    select USB_OHCI_PCI
-- 
2.43.0