static int uctrl_probe()

in char/uctrl.c [347:400]

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

static int uctrl_probe(struct platform_device *op)
{
	struct uctrl_driver *p;
	int err = -ENOMEM;

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p) {
		printk(KERN_ERR "uctrl: Unable to allocate device struct.\n");
		goto out;
	}

	p->regs = of_ioremap(&op->resource[0], 0,
			     resource_size(&op->resource[0]),
			     "uctrl");
	if (!p->regs) {
		printk(KERN_ERR "uctrl: Unable to map registers.\n");
		goto out_free;
	}

	p->irq = op->archdata.irqs[0];
	err = request_irq(p->irq, uctrl_interrupt, 0, "uctrl", p);
	if (err) {
		printk(KERN_ERR "uctrl: Unable to register irq.\n");
		goto out_iounmap;
	}

	err = misc_register(&uctrl_dev);
	if (err) {
		printk(KERN_ERR "uctrl: Unable to register misc device.\n");
		goto out_free_irq;
	}

	sbus_writel(UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK, &p->regs->uctrl_intr);
	printk(KERN_INFO "%pOF: uctrl regs[0x%p] (irq %d)\n",
	       op->dev.of_node, p->regs, p->irq);
	uctrl_get_event_status(p);
	uctrl_get_external_status(p);

	dev_set_drvdata(&op->dev, p);
	global_driver = p;

out:
	return err;

out_free_irq:
	free_irq(p->irq, p);

out_iounmap:
	of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));

out_free:
	kfree(p);
	goto out;
}