static ssize_t counter_comp_u64_store()

in counter-sysfs.c [307:337]

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

static ssize_t counter_comp_u64_store(struct device *dev,
				      struct device_attribute *attr,
				      const char *buf, size_t len)
{
	const struct counter_attribute *const a = to_counter_attribute(attr);
	struct counter_device *const counter = dev_get_drvdata(dev);
	int err;
	u64 data = 0;

	err = kstrtou64(buf, 0, &data);
	if (err < 0)
		return err;

	switch (a->scope) {
	case COUNTER_SCOPE_DEVICE:
		err = a->comp.device_u64_write(counter, data);
		break;
	case COUNTER_SCOPE_SIGNAL:
		err = a->comp.signal_u64_write(counter, a->parent, data);
		break;
	case COUNTER_SCOPE_COUNT:
		err = a->comp.count_u64_write(counter, a->parent, data);
		break;
	default:
		return -EINVAL;
	}
	if (err < 0)
		return err;

	return len;
}