From 6aec050fc482ce2b2af26302c1a8dbe7c34acd45 Mon Sep 17 00:00:00 2001
From: Christian Mehlis <mehlis@inf.fu-berlin.de>
Date: Mon, 16 Dec 2013 11:20:00 +0100
Subject: [PATCH] initialize id and only remove a valid timer

---
 boards/native/drivers/native-ltc4150.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/boards/native/drivers/native-ltc4150.c b/boards/native/drivers/native-ltc4150.c
index 871109e2d9..b1860b242b 100644
--- a/boards/native/drivers/native-ltc4150.c
+++ b/boards/native/drivers/native-ltc4150.c
@@ -55,7 +55,10 @@ void ltc4150_disable_int(void)
 {
     DEBUG("ltc4150_disable_int()\n");
     _native_ltc_int_enabled = 0;
-    hwtimer_remove(_native_ltc_hwtimer_id);
+    if (_native_ltc_hwtimer_id != -1) {
+        hwtimer_remove(_native_ltc_hwtimer_id);
+        _native_ltc_hwtimer_id = -1;
+    }
 }
 
 /**
@@ -84,6 +87,7 @@ void ltc4150_sync_blocking(void)
  */
 void ltc4150_arch_init(void)
 {
+    _native_ltc_hwtimer_id = -1;
     ltc4150_disable_int();
 
     puts("Native LTC4150 initialized.");