static int scom_probe()

in fsi-scom.c [540:585]

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

static int scom_probe(struct device *dev)
{
	struct fsi_device *fsi_dev = to_fsi_dev(dev);
	struct scom_device *scom;
	int rc, didx;

	scom = kzalloc(sizeof(*scom), GFP_KERNEL);
	if (!scom)
		return -ENOMEM;
	dev_set_drvdata(dev, scom);
	mutex_init(&scom->lock);

	/* Grab a reference to the device (parent of our cdev), we'll drop it later */
	if (!get_device(dev)) {
		kfree(scom);
		return -ENODEV;
	}
	scom->fsi_dev = fsi_dev;

	/* Create chardev for userspace access */
	scom->dev.type = &fsi_cdev_type;
	scom->dev.parent = dev;
	scom->dev.release = scom_free;
	device_initialize(&scom->dev);

	/* Allocate a minor in the FSI space */
	rc = fsi_get_new_minor(fsi_dev, fsi_dev_scom, &scom->dev.devt, &didx);
	if (rc)
		goto err;

	dev_set_name(&scom->dev, "scom%d", didx);
	cdev_init(&scom->cdev, &scom_fops);
	rc = cdev_device_add(&scom->cdev, &scom->dev);
	if (rc) {
		dev_err(dev, "Error %d creating char device %s\n",
			rc, dev_name(&scom->dev));
		goto err_free_minor;
	}

	return 0;
 err_free_minor:
	fsi_free_minor(scom->dev.devt);
 err:
	put_device(&scom->dev);
	return rc;
}