in carriers/tpci200.c [109:115]
static void tpci200_disable_irq(struct tpci200_board *tpci200, int islot) { tpci200_clear_mask(tpci200, &tpci200->info->interface_regs->control[islot], TPCI200_INT0_EN | TPCI200_INT1_EN); }