From 0774eaa7b29db81ab86820140f428cacf5cd41cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Sat, 21 Dec 2019 13:58:31 +0100
Subject: [PATCH] USB: minor, improve shutdown

---
 lib/usb_cdcacm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/usb_cdcacm.c b/lib/usb_cdcacm.c
index cb6290f..a794c94 100644
--- a/lib/usb_cdcacm.c
+++ b/lib/usb_cdcacm.c
@@ -250,6 +250,9 @@ static const char* usb_strings[] = {
 /** disconnect USB by pulling down D+ to for re-enumerate */
 static void usb_disconnect(void)
 {
+	if (usb_device) {
+		usbd_disconnect(usb_device, true);
+	}
 #if defined(MAPLE_MINI)
 	// disconnect USB D+ using dedicated DISC line/circuit on PB9
 	rcc_periph_clock_enable(RCC_GPIOB);