SD卡中断问题

retval = request_irq(IRQ_MSC, jz_mmc_irq, 0, "MMC/SD", host);
    if (retval) {
        printk(KERN_ERR "MMC/SD: can't request MMC/SD IRQ\n");
        return retval;
    }

    jz_mmc_slot_is_empty(0);
    /* Request card detect interrupt */

    retval = request_irq(MSC_HOTPLUG_IRQ, jz_mmc_detect_irq, 0,    //SA_INTERRUPT,
                 "MMC card detect", host);