static void intc_mask_ack()

in intc/chip.c [81:115]

• 30 lines of code
• 5 McCabe index (conditional complexity)

static void intc_mask_ack(struct irq_data *data)
{
	unsigned int irq = data->irq;
	struct intc_desc_int *d = get_intc_desc(irq);
	unsigned long handle = intc_get_ack_handle(irq);
	void __iomem *addr;

	intc_disable(data);

	/* read register and write zero only to the associated bit */
	if (handle) {
		unsigned int value;

		addr = (void __iomem *)INTC_REG(d, _INTC_ADDR_D(handle), 0);
		value = intc_set_field_from_handle(0, 1, handle);

		switch (_INTC_FN(handle)) {
		case REG_FN_MODIFY_BASE + 0:	/* 8bit */
			__raw_readb(addr);
			__raw_writeb(0xff ^ value, addr);
			break;
		case REG_FN_MODIFY_BASE + 1:	/* 16bit */
			__raw_readw(addr);
			__raw_writew(0xffff ^ value, addr);
			break;
		case REG_FN_MODIFY_BASE + 3:	/* 32bit */
			__raw_readl(addr);
			__raw_writel(0xffffffff ^ value, addr);
			break;
		default:
			BUG();
			break;
		}
	}
}