eng_interrupt
result = install_io_interrupt_handler(di->pcii.u.h0.interrupt_line, eng_interrupt, (void *)di, 0);
static int32 eng_interrupt(void *data);
remove_io_interrupt_handler(di->pcii.u.h0.interrupt_line, eng_interrupt, di);
result = install_io_interrupt_handler(di->pcii.u.h0.interrupt_line, eng_interrupt, (void *)di, 0);
static int32 eng_interrupt(void *data);
remove_io_interrupt_handler(di->pcii.u.h0.interrupt_line, eng_interrupt, di);