diff --git a/hgdriver/hgdev/usb_manager.cpp b/hgdriver/hgdev/usb_manager.cpp
index 0bee57e..97b0a92 100644
--- a/hgdriver/hgdev/usb_manager.cpp
+++ b/hgdriver/hgdev/usb_manager.cpp
@@ -844,21 +844,21 @@ int usb_io::control_io(uint8_t type, uint8_t req, uint16_t val, uint16_t ind, vo
     }
     else
     {
-        if (on_io_error((scanner_err)usb_manager::usb_error_2_hg_err(ret), &endpoints_.control.in))
-        {
-            ret = libusb_control_transfer(handle_, type, req, val, ind, (unsigned char*)buf, *len, to_);
-            if (ret > 0)
-            {
-                *len = ret;
+        //if (on_io_error((scanner_err)usb_manager::usb_error_2_hg_err(ret), &endpoints_.control.in))
+        //{
+        //    ret = libusb_control_transfer(handle_, type, req, val, ind, (unsigned char*)buf, *len, to_);
+        //    if (ret > 0)
+        //    {
+        //        *len = ret;
 
-                last_err_ = SCANNER_ERR_OK;
+        //        last_err_ = SCANNER_ERR_OK;
 
-                return last_err_;
-            }
-            else
-                *len = 0;
-        }
-        else
+        //        return last_err_;
+        //    }
+        //    else
+        //        *len = 0;
+        //}
+        //else
             *len = 0;
         VLOG_MINI_5(LOG_LEVEL_DEBUG_INFO, "libusb_control_transfer(%x, %x, %d, %d) = %s\n", type, req, val, ind, libusb_error_name(ret));
         last_err_ = usb_manager::usb_error_2_hg_err(ret);