Make sure to turn off LED soon.

ChangeLog

@@ -10,6 +10,7 @@
 	* src/usb-ccid.c (usb_event_handle): Use 2 for call of
 	chopstx_conf_idle on suspend.  Call random_fini on suspend
 	to stop ADC module.  Call random_init on wakeup.
+	Sleep a bit to switch main thread.
 
 2017-11-16  NIIBE Yutaka  <gniibe@fsij.org>
 

src/usb-ccid.c

@@ -1653,6 +1653,7 @@ usb_event_handle (struct usb_dev *dev)
 
     case USB_EVENT_DEVICE_SUSPEND:
       led_blink (LED_OFF);
+      chopstx_usec_wait (10);	/* Make sure LED off */
       random_fini ();
       chopstx_conf_idle (2);
       bDeviceState |= USB_DEVICE_STATE_SUSPEND;