From 5ab5c9b76784697092fe3ac340d4024ff59ab8d7 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 22 Sep 2017 08:56:09 -0700
Subject: [PATCH] Avoid duplicate joystick axis events

---
 src/joystick/SDL_joystick.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/joystick/SDL_joystick.c b/src/joystick/SDL_joystick.c
index bfce1faf2..0724db258 100644
--- a/src/joystick/SDL_joystick.c
+++ b/src/joystick/SDL_joystick.c
@@ -672,6 +672,9 @@ SDL_PrivateJoystickAxis(SDL_Joystick * joystick, Uint8 axis, Sint16 value)
         joystick->axes[axis].zero = value;
         joystick->axes[axis].has_initial_value = SDL_TRUE;
     }
+    if (value == joystick->axes[axis].value) {
+        return 0;
+    }
     if (!joystick->axes[axis].sent_initial_value) {
         /* Make sure we don't send motion until there's real activity on this axis */
         const int MAX_ALLOWED_JITTER = SDL_JOYSTICK_AXIS_MAX / 80;  /* ShanWan PS3 controller needed 96 */