diff --git a/components/drivers/usb/usbdevice/class/mstorage.c b/components/drivers/usb/usbdevice/class/mstorage.c
index 1bde46fff..17ea6c237 100644
--- a/components/drivers/usb/usbdevice/class/mstorage.c
+++ b/components/drivers/usb/usbdevice/class/mstorage.c
@@ -706,7 +706,7 @@ static void _cb_len_calc(ufunction_t func, struct scsi_cmd* cmd,
     }
     else
     {
-        rt_kprintf("cmd_len error %d\n", cmd->cmd_len);      
+//        rt_kprintf("cmd_len error %d\n", cmd->cmd_len);      
     }
 }
 
@@ -722,7 +722,7 @@ static rt_bool_t _cbw_verify(ufunction_t func, struct scsi_cmd* cmd,
     data = (struct mstorage*)func->user_data;   
     if(cmd->cmd_len != cbw->cb_len)
     {
-        rt_kprintf("cb_len error\n");
+  //      rt_kprintf("cb_len error\n");
         cmd->cmd_len = cbw->cb_len;
     }
 
@@ -753,7 +753,7 @@ static rt_bool_t _cbw_verify(ufunction_t func, struct scsi_cmd* cmd,
     
     if(cbw->xfer_len < data->cb_data_size)
     {
-        rt_kprintf("xfer_len < data_size\n");
+ //       rt_kprintf("xfer_len < data_size\n");
         data->cb_data_size = cbw->xfer_len;
         data->csw_response.status = 1;
     }
@@ -769,7 +769,7 @@ static rt_size_t _cbw_handler(ufunction_t func, struct scsi_cmd* cmd,
     RT_ASSERT(func != RT_NULL);
     RT_ASSERT(cbw != RT_NULL);
     RT_ASSERT(cmd->handler != RT_NULL);
-
    
+        
     data = (struct mstorage*)func->user_data;
     data->processing = cmd;
     return cmd->handler(func, cbw);
@@ -896,32 +896,32 @@ static rt_err_t _interface_handler(ufunction_t func, ureq_t setup)
 
     RT_DEBUG_LOG(RT_DEBUG_USB, ("mstorage_interface_handler\n"));
 
-    switch(setup->request)
+    switch(setup->bRequest)
     {
     case USBREQ_GET_MAX_LUN:        
         
         RT_DEBUG_LOG(RT_DEBUG_USB, ("USBREQ_GET_MAX_LUN\n"));
         
-        if(setup->value || setup->length != 1)
+        if(setup->wValue || setup->wLength != 1)
         {        
             rt_usbd_ep0_set_stall(func->device);
         }
         else
         {
-            rt_usbd_ep0_write(func->device, &lun, 1);
+            rt_usbd_ep0_write(func->device, &lun, setup->wLength);
         }
         break;
     case USBREQ_MASS_STORAGE_RESET:
 
         RT_DEBUG_LOG(RT_DEBUG_USB, ("USBREQ_MASS_STORAGE_RESET\n"));
         
-        if(setup->value || setup->length != 0)
+        if(setup->wValue || setup->wLength != 0)
         {
             rt_usbd_ep0_set_stall(func->device);
         }
         else
-        {            
-            rt_usbd_ep0_write(func->device, RT_NULL, 0);
+        {   
+            dcd_ep0_send_status(func->device->dcd);     
         }
         break;
     default:
diff --git a/components/drivers/usb/usbdevice/core/core.c b/components/drivers/usb/usbdevice/core/core.c
index 3c0d8f1e2..15ab31e9f 100644
--- a/components/drivers/usb/usbdevice/core/core.c
+++ b/components/drivers/usb/usbdevice/core/core.c
@@ -840,6 +840,10 @@ static rt_err_t _data_notify(udevice_t device, struct ep_msg* ep_msg)
         {
             EP_HANDLER(ep, func, ep->request.size);
         }
+        else
+        {
+            dcd_ep_read_prepare(device->dcd, EP_ADDRESS(ep), ep->request.buffer, ep->request.remain_size > EP_MAXPACKET(ep) ? EP_MAXPACKET(ep) : ep->request.remain_size);
+        }
     }
 
     return RT_EOK;
@@ -973,7 +977,7 @@ static rt_size_t rt_usbd_ep_read_prepare(udevice_t device, uep_t ep, void *buffe
     RT_ASSERT(buffer != RT_NULL);
     RT_ASSERT(ep->ep_desc != RT_NULL);
 
-    return dcd_ep_read_prepare(device->dcd, EP_ADDRESS(ep), buffer, size);
+    return dcd_ep_read_prepare(device->dcd, EP_ADDRESS(ep), buffer, size > EP_MAXPACKET(ep) ? EP_MAXPACKET(ep) : size);
 }
 
 /**