我有一个问题是干净地关闭使用libusb的Linux应用程序(内核不回收接口)：

int rc;

rc = libusb_reset_device(handle_);
if (rc < 0) {
    cerr << "Error resetting the device: " << libusb_error_name(rc);
}

for (int ifnum = 0; ifnum < 2; ifnum++) {
    rc = libusb_release_interface(handle_,ifnum);
    if (rc < 0) {
        cerr << "Error releasing interface: " << libusb_error_name(rc);
    }
    if (libusb_kernel_driver_active(handle_,ifnum)) {
        cerr << "Reattaching CDC ACM kernel driver.";
        rc = libusb_attach_kernel_driver(handle_,ifnum);
        if (rc < 0) {
            cerr << "Error reattaching CDC ACM kernel driver: " << libusb_error_name(rc);
        }
    }
}

libusb_close(handle_);
libusb_exit(NULL);

问题是重新附加内核驱动程序不起作用.实际上libusb_kernel_driver_active不会返回1,但即使我将其注释掉并且始终调用libusb_attach_kernel_driver,我也永远不会收回我的/ dev / ttyACM0设备.在这种情况下,我得到LIBUSB_ERROR_NOT_FOUND.