[Qemu-devel] [PATCH 1/6] usb: add usb_bus_release function

[arei.gonglei]

From: Gonglei <address@hidden>

add global variables releasing logic when the usb buses
were removed or hot-unpluged.

Signed-off-by: Gonglei <address@hidden>
---
 hw/usb/bus.c     | 8 ++++++++
 include/hw/usb.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 927a47b..e65f272 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -87,6 +87,14 @@ void usb_bus_new(USBBus *bus, size_t bus_size,
     QTAILQ_INSERT_TAIL(&busses, bus, next);
 }
 
+void usb_bus_release(USBBus *bus)
+{
+    assert(next_usb_bus > 0);
+
+    next_usb_bus--;
+    QTAILQ_REMOVE(&busses, bus, next);
+}
+
 USBBus *usb_bus_find(int busnr)
 {
     USBBus *bus;
diff --git a/include/hw/usb.h b/include/hw/usb.h
index 1919bdc..f0f9e73 100644
--- a/include/hw/usb.h
+++ b/include/hw/usb.h
@@ -523,6 +523,7 @@ struct USBBusOps {
 
 void usb_bus_new(USBBus *bus, size_t bus_size,
                  USBBusOps *ops, DeviceState *host);
+void usb_bus_release(USBBus *bus);
 USBBus *usb_bus_find(int busnr);
 void usb_legacy_register(const char *typename, const char *usbdevice_name,
                          USBDevice *(*usbdevice_init)(USBBus *bus,
-- 
1.7.12.4