for (i = 0; devlist[i]; i++) {
if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
sr_err("Failed to get device descriptor: %d.", err);
for (i = 0; devlist[i]; i++) {
if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
sr_err("Failed to get device descriptor: %d.", err);