Use cached HID descriptor.

src/class/hid/hid_device.c

@@ -205,32 +205,15 @@ bool hidd_control_request(uint8_t rhport, tusb_control_request_t const * p_reque
 
     if (p_request->bRequest == TUSB_REQ_GET_DESCRIPTOR && desc_type == HID_DESC_TYPE_HID)
     {
-      // FIXME: Should check which is the active configuration, but no callback in usbd currently exists to do that
       TU_VERIFY(p_hid->hid_descriptor != NULL);
-      tusb_desc_configuration_t const* desc_cfg =
-          (tusb_desc_configuration_t const*) tud_descriptor_configuration_cb(0);
-      uint8_t const * p_desc   = ((uint8_t const*) desc_cfg) + sizeof(tusb_desc_configuration_t);
-      uint8_t const * desc_end = ((uint8_t const*) desc_cfg) + desc_cfg->wTotalLength;
-
-      while( p_desc < desc_end )
-      {
-        tusb_hid_descriptor_hid_t *p_desc_hid =(tusb_hid_descriptor_hid_t*)p_desc;
-        if(p_desc_hid->bDescriptorType == HID_DESC_TYPE_HID) {
-          tud_control_xfer(rhport, p_request, (void*) p_desc_hid, p_desc_hid->bLength);
-          break;
-        }
-        p_desc += p_desc_hid->bLength; // next desc
-      }
-      if(p_desc >= desc_end)
-      {
-        return false;
-      }
+      TU_VERIFY(tud_control_xfer(rhport, p_request, (void*) p_hid->hid_descriptor, p_hid->hid_descriptor->bLength));
     }
     else if (p_request->bRequest == TUSB_REQ_GET_DESCRIPTOR && desc_type == HID_DESC_TYPE_REPORT)
     {
       uint8_t const * desc_report = tud_hid_descriptor_report_cb();
       tud_control_xfer(rhport, p_request, (void*) desc_report, p_hid->report_desc_len);
-    }else
+    }
+    else
     {
       return false; // stall unsupported request
     }