Align with the i2c-hid driver by returning 0 instead of -EINVAL when
an empty response is received, ensuring that userspace programs utilizing
the hidraw node receive consistent return values.
Signed-off-by: Charles Wang <charles.goodix@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
dev_err(ts->dev, "hrd.size too short: %d", len);
return -EINVAL;
}
- *resp_len = len;
+ *resp_len = len - GOODIX_HID_PKG_LEN_SIZE;
return 0;
}
if (error)
return error;
- len = min(len, response_data_len - GOODIX_HID_PKG_LEN_SIZE);
+ /* Empty reprot response */
+ if (!response_data_len)
+ return 0;
+ len = min(len, response_data_len);
/* Step3: read response data(skip 2bytes of hid pkg length) */
error = goodix_spi_read(ts, ts->hid_report_addr +
GOODIX_HID_ACK_HEADER_SIZE +