MTFSR
[MTFSR] = tape_std_mtfsr,
case MTFSR:
if (mt_op == MTBSR || mt_op == MTFSR || mt_op == MTFSF ||
rc = tape_mtop(device, MTFSR, 1);
if ((rc = tape_mtop(device, MTFSR, 1)) < 0)
case MTFSR:
} else if (cmd_in == MTFSR) {