static int pcmcia_device_probe()

in ds.c [251:315]

• 56 lines of code
• 12 McCabe index (conditional complexity)

static int pcmcia_device_probe(struct device *dev)
{
	struct pcmcia_device *p_dev;
	struct pcmcia_driver *p_drv;
	struct pcmcia_socket *s;
	cistpl_config_t cis_config;
	int ret = 0;

	dev = get_device(dev);
	if (!dev)
		return -ENODEV;

	p_dev = to_pcmcia_dev(dev);
	p_drv = to_pcmcia_drv(dev->driver);
	s = p_dev->socket;

	dev_dbg(dev, "trying to bind to %s\n", p_drv->name);

	if ((!p_drv->probe) || (!p_dev->function_config) ||
	    (!try_module_get(p_drv->owner))) {
		ret = -EINVAL;
		goto put_dev;
	}

	/* set up some more device information */
	ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
				&cis_config);
	if (!ret) {
		p_dev->config_base = cis_config.base;
		p_dev->config_regs = cis_config.rmask[0];
		dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
			p_dev->config_regs);
	} else {
		dev_info(dev,
			 "pcmcia: could not parse base and rmask0 of CIS\n");
		p_dev->config_base = 0;
		p_dev->config_regs = 0;
	}

	ret = p_drv->probe(p_dev);
	if (ret) {
		dev_dbg(dev, "binding to %s failed with %d\n",
			   p_drv->name, ret);
		goto put_module;
	}
	dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
		p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
	dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
		p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
		p_dev->resource[3], p_dev->resource[4]);

	mutex_lock(&s->ops_mutex);
	if ((s->pcmcia_pfc) &&
	    (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
		pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
	mutex_unlock(&s->ops_mutex);

put_module:
	if (ret)
		module_put(p_drv->owner);
put_dev:
	if (ret)
		put_device(dev);
	return ret;
}