ibrsp(gscpi->descriptor, buf);
if (ibsta & ERR) {
sr_err("Error while serial polling: iberr = %s.",
gpib_error_string(iberr));
ibrsp(gscpi->descriptor, buf);
if (ibsta & ERR) {
sr_err("Error while serial polling: iberr = %s.",
gpib_error_string(iberr));