static int cp2112_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
	struct cp2112_device *dev = gpiochip_get_data(chip);
	struct hid_device *hdev = dev->hdev;
	u8 *buf = dev->in_out_buffer;
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&dev->lock, flags);

	ret = hid_hw_raw_request(hdev, CP2112_GPIO_CONFIG, buf,
				 CP2112_GPIO_CONFIG_LENGTH, HID_FEATURE_REPORT,
				 HID_REQ_GET_REPORT);
	if (ret != CP2112_GPIO_CONFIG_LENGTH) {
		hid_err(hdev, "error requesting GPIO config: %d\n", ret);
		goto exit;
	}

	buf[1] &= ~(1 << offset);
	buf[2] = gpio_push_pull;

	ret = hid_hw_raw_request(hdev, CP2112_GPIO_CONFIG, buf,
				 CP2112_GPIO_CONFIG_LENGTH, HID_FEATURE_REPORT,
				 HID_REQ_SET_REPORT);
	if (ret < 0) {
		hid_err(hdev, "error setting GPIO config: %d\n", ret);
		goto exit;
	}

	ret = 0;

exit:
	spin_unlock_irqrestore(&dev->lock, flags);
	return ret <= 0 ? ret : -EIO;
}
The program does not release or incorrectly releases a resource before it is made available for re-use.