if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
if (ret < 0) {
if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
if (ret < 0) {