edpt_close: Remove item from queue instead of modifying it.

src/device/dcd.h

@@ -66,7 +66,7 @@ typedef struct TU_ATTR_ALIGNED(4)
 
     // USBD_EVT_XFER_COMPLETE
     struct {
-      uint8_t  ep_addr; ///< 0xFF signifies that the transfer was aborted.
+      uint8_t  ep_addr;
       uint8_t  result;
       uint32_t len;
     }xfer_complete;

src/device/usbd.c

@@ -420,11 +420,6 @@ void tud_task (void)
         uint8_t const ep_addr = event.xfer_complete.ep_addr;
         uint8_t const epnum   = tu_edpt_number(ep_addr);
         uint8_t const ep_dir  = tu_edpt_dir(ep_addr);
-        
-        if(ep_addr == 0xFF) // aborted transfer
-        {
-          break;
-        }
 
         TU_LOG2("  Endpoint: 0x%02X, Bytes: %u\r\n", ep_addr, (unsigned int) event.xfer_complete.len);
 
@@ -1069,9 +1064,11 @@ static void usbd_abort_transfers(uint8_t rhport, uint8_t ep_addr)
       && (event.xfer_complete.ep_addr == ep_addr))
     {
       _usbd_dev.ep_status[epnum][ep_dir].busy = false;
-      event.xfer_complete.ep_addr = 0xFF; // Mark transfer as invalid
     }
-    TU_ASSERT(osal_queue_send(_usbd_q, &event, true), /**/);
+    else
+    {
+      TU_ASSERT(osal_queue_send(_usbd_q, &event, true), /**/);
+    }
     TU_ASSERT(osal_queue_receive(_usbd_q, &event), /**/);
   }
   
@@ -1087,7 +1084,6 @@ static void usbd_abort_transfers(uint8_t rhport, uint8_t ep_addr)
  */
 void usbd_edpt_close(uint8_t rhport, uint8_t ep_addr)
 {
-  
   TU_ASSERT(dcd_edpt_close, /**/);
   TU_LOG2("  CLOSING Endpoint: 0x%02X\r\n", ep_addr);