[Spice-devel] [spice-gtk v2] usb-device-manager: Set UsbDk backend on libusb 1.0.22

[Victor Toso]

From: 王凡 <wangfan1987.good at 163.com>

In libusb 1.0.21, UsbDk is enabled at compile time with --enable-usbdk
option. In libusb 1.0.22, the backend is selected at runtime.

This patch avoids a crash when spice client is compiled against libusb
1.0.22 and UsbDk is not installed.

* Enabling dynamic backend selection in Windows
https://github.com/libusb/libusb/commit/54884e84d024e761450287ab56aca

https://gitlab.freedesktop.org/spice/spice-gtk/issues/74
Signed-off-by: Victor Toso <victortoso at redhat.com>
---
 src/usb-device-manager.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/usb-device-manager.c b/src/usb-device-manager.c
index 55bf67e..50fb491 100644
--- a/src/usb-device-manager.c
+++ b/src/usb-device-manager.c
@@ -303,6 +303,12 @@ static gboolean spice_usb_device_manager_initable_init(GInitable  *initable,
         return FALSE;
     }
 
+#ifdef G_OS_WIN32
+#if LIBUSB_API_VERSION >= 0x01000106
+    libusb_set_option(priv->context, LIBUSB_OPTION_USE_USBDK);
+#endif
+#endif
+
     /* Start listening for usb devices plug / unplug */
 #ifdef USE_GUDEV
     priv->udev = g_udev_client_new(subsystems);
-- 
2.17.1