3 files changed, 6 insertions, 4 deletions
diff --git a/tinyusb/host/ehci/ehci.c b/tinyusb/host/ehci/ehci.c
index c016a3a3c..c1ea9a7ed 100644
--- a/tinyusb/host/ehci/ehci.c
+++ b/tinyusb/host/ehci/ehci.c
@@ -529,7 +529,7 @@ void qhd_xfer_complete_isr(ehci_qhd_t * p_qhd, tusb_xfer_type_t xfer_type)
     if (is_ioc) // end of request
     {
       usbh_xfer_isr( qhd_create_pipe_handle(p_qhd, xfer_type),
-                     p_qhd->class_code, TUSB_EVENT_XFER_COMPLETE); // call USBH callback
+                     p_qhd->class_code, TUSB_EVENT_XFER_COMPLETE, actual_bytes_xferred); // call USBH callback
     }
   }
 }
@@ -602,13 +602,15 @@ void qhd_xfer_error_isr(ehci_qhd_t * p_qhd, tusb_xfer_type_t xfer_type)
     error_event = ( !(p_qhd->qtd_overlay.buffer_err || p_qhd->qtd_overlay.babble_err ||
         p_qhd->qtd_overlay.xact_err) ) ? TUSB_EVENT_XFER_STALLED : TUSB_EVENT_XFER_ERROR;
 
+    uint16_t actual_bytes_xferred = p_qhd->p_qtd_list_head->expected_bytes - p_qhd->p_qtd_list_head->total_bytes;
+
     hal_debugger_breakpoint();
 
     p_qhd->p_qtd_list_head->used = 0; // free QTD
     qtd_remove_1st_from_qhd(p_qhd);
 
     usbh_xfer_isr( qhd_create_pipe_handle(p_qhd, xfer_type),
-                   p_qhd->class_code, error_event); // call USBH callback
+                   p_qhd->class_code, error_event, actual_bytes_xferred); // call USBH callback
   }
 }
 
diff --git a/tinyusb/host/usbh.c b/tinyusb/host/usbh.c
index f5689b07c..794fd3be7 100644
--- a/tinyusb/host/usbh.c
+++ b/tinyusb/host/usbh.c
@@ -236,7 +236,7 @@ tusb_interface_status_t usbh_pipe_status_get(pipe_handle_t pipe_hdl)
 // USBH-HCD ISR/Callback API
 //--------------------------------------------------------------------+
 // interrupt caused by a TD (with IOC=1) in pipe of class class_code
-void usbh_xfer_isr(pipe_handle_t pipe_hdl, uint8_t class_code, tusb_event_t event)
+void usbh_xfer_isr(pipe_handle_t pipe_hdl, uint8_t class_code, tusb_event_t event, uint32_t xferred_bytes)
 {
   uint8_t class_index = std_class_code_to_index(class_code);
   if (TUSB_XFER_CONTROL == pipe_hdl.xfer_type)
diff --git a/tinyusb/host/usbh_hcd.h b/tinyusb/host/usbh_hcd.h
index c8b0a9f4a..cda043541 100644
--- a/tinyusb/host/usbh_hcd.h
+++ b/tinyusb/host/usbh_hcd.h
@@ -113,7 +113,7 @@ extern usbh_device_info_t usbh_devices[TUSB_CFG_HOST_DEVICE_MAX+1]; // including
 //--------------------------------------------------------------------+
 // callback from HCD ISR
 //--------------------------------------------------------------------+
-void usbh_xfer_isr(pipe_handle_t pipe_hdl, uint8_t class_code, tusb_event_t event);
+void usbh_xfer_isr(pipe_handle_t pipe_hdl, uint8_t class_code, tusb_event_t event, uint32_t xferred_bytes);
 void usbh_device_plugged_isr(uint8_t hostid);
 void usbh_device_unplugged_isr(uint8_t hostid);