static ssize_t counter_comp_u64_show()

in counter-sysfs.c [280:305]

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

static ssize_t counter_comp_u64_show(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	const struct counter_attribute *const a = to_counter_attribute(attr);
	struct counter_device *const counter = dev_get_drvdata(dev);
	int err;
	u64 data = 0;

	switch (a->scope) {
	case COUNTER_SCOPE_DEVICE:
		err = a->comp.device_u64_read(counter, &data);
		break;
	case COUNTER_SCOPE_SIGNAL:
		err = a->comp.signal_u64_read(counter, a->parent, &data);
		break;
	case COUNTER_SCOPE_COUNT:
		err = a->comp.count_u64_read(counter, a->parent, &data);
		break;
	default:
		return -EINVAL;
	}
	if (err < 0)
		return err;

	return sysfs_emit(buf, "%llu\n", (unsigned long long)data);
}