From 59657355d22cd6f661fda307675c6f712b5542ec Mon Sep 17 00:00:00 2001
From: Fred Sundvik <fsundvik@gmail.com>
Date: Sun, 13 Mar 2016 21:38:51 +0200
Subject: [PATCH] Master mode remains active

It remains active even if the USB link is suspended or otherwise
temporarilly goes down.
---
 serial_link/system/system.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/serial_link/system/system.c b/serial_link/system/system.c
index 5406db3f4..f74d8c9e9 100644
--- a/serial_link/system/system.c
+++ b/serial_link/system/system.c
@@ -88,11 +88,13 @@ static THD_FUNCTION(serialThread, arg) {
         EVENT_MASK(2),
         CHN_INPUT_AVAILABLE);
     bool need_wait = false;
+    bool is_master = false;
     while(true) {
         if (need_wait) {
             chEvtWaitAnyTimeout(ALL_EVENTS, MS2ST(1000));
         }
-        bool is_master = usbGetDriverStateI(&USBD1) == USB_ACTIVE;
+        // Always stay as master, even if the USB goes into sleep mode
+        is_master |= usbGetDriverStateI(&USBD1) == USB_ACTIVE;
         router_set_master(is_master);
 
         need_wait = true;