From 1770b09a236eae0e9720fbe77c376ff1df3fd18f Mon Sep 17 00:00:00 2001
From: Iwan Timmer <irtimmer@gmail.com>
Date: Wed, 21 Jun 2017 17:30:50 +0200
Subject: [PATCH] Check for non-available axis

---
 src/input/evdev.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/input/evdev.c b/src/input/evdev.c
index c7ac114..b1a25fc 100644
--- a/src/input/evdev.c
+++ b/src/input/evdev.c
@@ -117,6 +117,11 @@ static void evdev_remove(int devindex) {
 }
 
 static short evdev_convert_value(struct input_event *ev, struct input_device *dev, struct input_abs_parms *parms, bool reverse) {
+  if (parms->max == 0 && parms->min == 0) {
+    fprintf(stderr, "Unmapped axis: %d\n", ev->code);
+    return 0;
+  }
+
   if (abs(ev->value - parms->avg) < parms->flat)
     return 0;
   else if (ev->value > parms->max)
@@ -130,6 +135,11 @@ static short evdev_convert_value(struct input_event *ev, struct input_device *de
 }
 
 static char evdev_convert_value_byte(struct input_event *ev, struct input_device *dev, struct input_abs_parms *parms) {
+  if (parms->max == 0 && parms->min == 0) {
+    fprintf(stderr, "Unmapped axis: %d\n", ev->code);
+    return 0;
+  }
+
   if (abs(ev->value-parms->min)<parms->flat)
     return 0;
   else if (ev->value>parms->max)