static int __init wax_init_chip()

in wax.c [67:122]

• 40 lines of code
• 6 McCabe index (conditional complexity)

static int __init wax_init_chip(struct parisc_device *dev)
{
	struct gsc_asic *wax;
	struct parisc_device *parent;
	struct gsc_irq gsc_irq;
	int ret;

	wax = kzalloc(sizeof(*wax), GFP_KERNEL);
	if (!wax)
		return -ENOMEM;

	wax->name = "wax";
	wax->hpa = dev->hpa.start;

	wax->version = 0;   /* gsc_readb(wax->hpa+WAX_VER); */
	printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa);

	/* Stop wax hissing for a bit */
	wax_init_irq(wax);

	/* the IRQ wax should use */
	dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(wax);
		return -EBUSY;
	}

	wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax);
	if (ret < 0) {
		kfree(wax);
		return ret;
	}

	/* enable IRQ's for devices below WAX */
	gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);

	/* Done init'ing, register this driver */
	ret = gsc_common_setup(dev, wax);
	if (ret) {
		kfree(wax);
		return ret;
	}

	gsc_fixup_irqs(dev, wax, wax_choose_irq);
	/* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
	parent = parisc_parent(dev);
	if (parent->id.hw_type != HPHW_IOA) {
		gsc_fixup_irqs(parent, wax, wax_choose_irq);
	}

	return ret;
}