static irqreturn_t ca91cx42_irqhandler()

in bridges/vme_ca91cx42.c [150:192]

• 33 lines of code
• 9 McCabe index (conditional complexity)

static irqreturn_t ca91cx42_irqhandler(int irq, void *ptr)
{
	u32 stat, enable, serviced = 0;
	struct vme_bridge *ca91cx42_bridge;
	struct ca91cx42_driver *bridge;

	ca91cx42_bridge = ptr;

	bridge = ca91cx42_bridge->driver_priv;

	enable = ioread32(bridge->base + LINT_EN);
	stat = ioread32(bridge->base + LINT_STAT);

	/* Only look at unmasked interrupts */
	stat &= enable;

	if (unlikely(!stat))
		return IRQ_NONE;

	if (stat & CA91CX42_LINT_DMA)
		serviced |= ca91cx42_DMA_irqhandler(bridge);
	if (stat & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
			CA91CX42_LINT_LM3))
		serviced |= ca91cx42_LM_irqhandler(bridge, stat);
	if (stat & CA91CX42_LINT_MBOX)
		serviced |= ca91cx42_MB_irqhandler(bridge, stat);
	if (stat & CA91CX42_LINT_SW_IACK)
		serviced |= ca91cx42_IACK_irqhandler(bridge);
	if (stat & CA91CX42_LINT_VERR)
		serviced |= ca91cx42_VERR_irqhandler(ca91cx42_bridge);
	if (stat & CA91CX42_LINT_LERR)
		serviced |= ca91cx42_LERR_irqhandler(ca91cx42_bridge);
	if (stat & (CA91CX42_LINT_VIRQ1 | CA91CX42_LINT_VIRQ2 |
			CA91CX42_LINT_VIRQ3 | CA91CX42_LINT_VIRQ4 |
			CA91CX42_LINT_VIRQ5 | CA91CX42_LINT_VIRQ6 |
			CA91CX42_LINT_VIRQ7))
		serviced |= ca91cx42_VIRQ_irqhandler(ca91cx42_bridge, stat);

	/* Clear serviced interrupts */
	iowrite32(serviced, bridge->base + LINT_STAT);

	return IRQ_HANDLED;
}