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 ");

return 0;

}

void cleanup_module()

{

// Освобождаем порты ввода-вывода

release_region(PORT_START, PORT_QTY);

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

// Освобождаем память

release_mem_region(MEM_START, MEM_QTY);

printk("My module: release memory ");

// Освобождаем прерывание

free_irq(IRQ_NUM,NULL);

printk("My module: release irq ");

// Отменяем регистрацию устройства

if (unregister_chrdev(Major, DEV_NAME) < 0){

   printk("My module: cannot to unregister device ");

}

printk("My module: device unregistered ");

return;

}

static int device_open(struct inode *inode, struct file *fp)

{

struct device_state *dev_state;