static irqreturn_t tsi148_irqhandler()

in bridges/vme_tsi148.c [244:302]

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

static irqreturn_t tsi148_irqhandler(int irq, void *ptr)
{
	u32 stat, enable, serviced = 0;
	struct vme_bridge *tsi148_bridge;
	struct tsi148_driver *bridge;

	tsi148_bridge = ptr;

	bridge = tsi148_bridge->driver_priv;

	/* Determine which interrupts are unmasked and set */
	enable = ioread32be(bridge->base + TSI148_LCSR_INTEO);
	stat = ioread32be(bridge->base + TSI148_LCSR_INTS);

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

	if (unlikely(!stat))
		return IRQ_NONE;

	/* Call subhandlers as appropriate */
	/* DMA irqs */
	if (stat & (TSI148_LCSR_INTS_DMA1S | TSI148_LCSR_INTS_DMA0S))
		serviced |= tsi148_DMA_irqhandler(bridge, stat);

	/* Location monitor irqs */
	if (stat & (TSI148_LCSR_INTS_LM3S | TSI148_LCSR_INTS_LM2S |
			TSI148_LCSR_INTS_LM1S | TSI148_LCSR_INTS_LM0S))
		serviced |= tsi148_LM_irqhandler(bridge, stat);

	/* Mail box irqs */
	if (stat & (TSI148_LCSR_INTS_MB3S | TSI148_LCSR_INTS_MB2S |
			TSI148_LCSR_INTS_MB1S | TSI148_LCSR_INTS_MB0S))
		serviced |= tsi148_MB_irqhandler(tsi148_bridge, stat);

	/* PCI bus error */
	if (stat & TSI148_LCSR_INTS_PERRS)
		serviced |= tsi148_PERR_irqhandler(tsi148_bridge);

	/* VME bus error */
	if (stat & TSI148_LCSR_INTS_VERRS)
		serviced |= tsi148_VERR_irqhandler(tsi148_bridge);

	/* IACK irq */
	if (stat & TSI148_LCSR_INTS_IACKS)
		serviced |= tsi148_IACK_irqhandler(bridge);

	/* VME bus irqs */
	if (stat & (TSI148_LCSR_INTS_IRQ7S | TSI148_LCSR_INTS_IRQ6S |
			TSI148_LCSR_INTS_IRQ5S | TSI148_LCSR_INTS_IRQ4S |
			TSI148_LCSR_INTS_IRQ3S | TSI148_LCSR_INTS_IRQ2S |
			TSI148_LCSR_INTS_IRQ1S))
		serviced |= tsi148_VIRQ_irqhandler(tsi148_bridge, stat);

	/* Clear serviced interrupts */
	iowrite32be(serviced, bridge->base + TSI148_LCSR_INTC);

	return IRQ_HANDLED;
}