Custom ip: can't see IRQ number in system.h

I met the same problem.

And I try the way @m3atwad said: 'changing the interface name to something else on this second peripheral'. but it did not work.

The attachment is my component's _hw.tcl~ , and here is part of system.h code generated by using the related sopcinfo

# define alt_module_class_ezusb2nios_0 ezusb2nios

# define ezusb2nios_0_base 0x0

# define ezusb2nios_0_irq -1

# define ezusb2nios_0_irq_interrupt_controller_id -1

# define ezusb2nios_0_name "/dev/ezusb2nios_0"

# define ezusb2nios_0_span 1024

# define ezusb2nios_0_type "ezusb2nios"

You can see, the IRQ and IRQ_INTERRUPT_CONTROLLER_ID is still -1.

I don't know why