static ssize_t counter_comp_u8_show()

in counter-sysfs.c [89:118]

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

static ssize_t counter_comp_u8_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;
	u8 data = 0;

	switch (a->scope) {
	case COUNTER_SCOPE_DEVICE:
		err = a->comp.device_u8_read(counter, &data);
		break;
	case COUNTER_SCOPE_SIGNAL:
		err = a->comp.signal_u8_read(counter, a->parent, &data);
		break;
	case COUNTER_SCOPE_COUNT:
		err = a->comp.count_u8_read(counter, a->parent, &data);
		break;
	default:
		return -EINVAL;
	}
	if (err < 0)
		return err;

	if (a->comp.type == COUNTER_COMP_BOOL)
		/* data should already be boolean but ensure just to be safe */
		data = !!data;

	return sysfs_emit(buf, "%u\n", (unsigned int)data);
}