Major = register_chrdev(0, DEV_NAME, &FO);

if (Major < 0) {

// Устройство не зарегистрировано

printk("My module: registration failed ");

return Major;

}

printk("My module: device registered, major number = %d ",Major);

// Резервирование портов ввода-вывода

printk("My module: allocating io ports ");

if (check_region(PORT_START, PORT_QTY))

{

printk("My module: allocation io ports failed ");

return -EBUSY;

}

request_region(PORT_START, PORT_QTY, DEV_NAME);

printk ("My module: io ports allocated ");

// Резервирование памяти

if (check_mem_region(MEM_START, MEM_QTY))

{

printk("My module: memory allocation failed ");

release_region(PORT_START, PORT_QTY);

return -EBUSY;

}

request_mem_region(MEM_START, MEM_QTY, DEV_NAME);

printk ("My module: memory allocated ");

// Резервирование прерывания

if (request_irq(IRQ_NUM, irq_handler, 0, DEV_NAME, NULL))

{

printk("My module: IRQ allocation failed ");

release_mem_region(MEM_START, MEM_QTY);

release_region(PORT_START, PORT_QTY);

return -EBUSY;

}

printk ("My module: IRQ allocated ");