EXTIRQ_WAKEUP
if (ext_irq & EXTIRQ_WAKEUP)
writeb(EXTIRQ_WAKEUP, &pdev->interrupt_regs->extien);
ext_irq = readb(&pdev->interrupt_regs->extirq) & EXTIRQ_WAKEUP;
if (ext_irq & EXTIRQ_WAKEUP) {
writeb(EXTIRQ_WAKEUP, &pdev->interrupt_regs->extien);
writeb(EXTIRQ_WAKEUP, &pdev->interrupt_regs->extien);