Merge pull request #383 from kasjer/kasjer/fox-busy-flag-race-condition

Fix endpoint busy flag race condition

src/device/usbd.c

@@ -995,8 +995,8 @@ bool usbd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
 
   TU_LOG2("  Queue EP %02X with %u bytes ... ", ep_addr, total_bytes);
 
-  TU_VERIFY( dcd_edpt_xfer(rhport, ep_addr, buffer, total_bytes) );
   _usbd_dev.ep_status[epnum][dir].busy = true;
+  TU_VERIFY_HDLR( dcd_edpt_xfer(rhport, ep_addr, buffer, total_bytes), _usbd_dev.ep_status[epnum][dir].busy = false);
 
   TU_LOG2("OK\r\n");