static ssize_t show_tabletProduct(struct device *dev, char *buf)
static ssize_t show_tabletProduct(struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t show_tabletProduct(struct device *dev, char *buf){	struct aiptek *aiptek = dev_get_drvdata(dev);	int retval;	if (aiptek == NULL)		return 0;	retval = snprintf(buf, PAGE_SIZE, "%s\n", aiptek->usbdev->product);	return retval;}