Ethernet driver

[Pablo Pessolani]

Hi:

    I am writing a device driver for a network interface. I use lance driver as the starting model.

There is something that I don't understand.

When INET requests LANCE, it uses sendrec() and LANCE receives with receive(). 

If a harware interrupt occurs because a frame arrived, the IRQ is converted into a notify() to LANCE.

        Although LANCE main loop disables IRQ after receive(), INET could request LANCE 

after receive() but before sys_irqdisable(). Then, once the notify message is addressed

, do_int() replies though a reply() which uses send() to INET. But INET is waiting the reply of is request, 

        not the message informing it about the arriving of a frame.

Can anyone explain what is bad in my reasoning?

Thanks in advance.

PAP