From ca4b48aac25efcb54c3d69779aba01731734d823 Mon Sep 17 00:00:00 2001
From: hichard <hichard_ren@yeah.net>
Date: Wed, 7 Nov 2018 22:48:50 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DSTM32F4-Hal=20bsp=20USB?=
 =?UTF-8?q?=E4=B8=BB=E6=9C=BA=E9=A9=B1=E5=8A=A8=E7=9A=84=E4=B8=80=E4=B8=AA?=
 =?UTF-8?q?bug?=
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---
 bsp/stm32f4xx-HAL/drivers/drv_usbh.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bsp/stm32f4xx-HAL/drivers/drv_usbh.c b/bsp/stm32f4xx-HAL/drivers/drv_usbh.c
index 6065e06f8..e002c2f7e 100644
--- a/bsp/stm32f4xx-HAL/drivers/drv_usbh.c
+++ b/bsp/stm32f4xx-HAL/drivers/drv_usbh.c
@@ -179,6 +179,9 @@ static int drv_pipe_xfer(upipe_t pipe, rt_uint8_t token, void *buffer, int nbyte
             {
                 pipe->callback(pipe);
             }
+            if (pipe->ep.bEndpointAddress & 0x80) {
+                return HAL_HCD_HC_GetXferCount(&_stm_hhcd_fs, pipe->pipe_index);
+            } 
             return nbytes;
         }
         return -1;
-- 
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