devc->state = GET_PACKET;
} else if (devc->state == GET_PACKET) {
/* Read a packet from the device. */
- ret = serial_read(serial, devc->buf + devc->buflen,
+ ret = serial_read_nonblocking(serial, devc->buf + devc->buflen,
4 - devc->buflen);
if (ret < 0) {
sr_err("Error reading packet: %d.", ret);