From feedda1d84e11f3b80ae076400531ab8a9eadacb Mon Sep 17 00:00:00 2001
From: Demon000 <demonsingur@gmail.com>
Date: Fri, 6 Sep 2019 13:47:29 +0200
Subject: [PATCH] davinci: light: Avoid uint32_t underflow

Change-Id: If4f9360cc301ee8ba9f432dbbe3379c2c634c574
---
 light/Light.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/light/Light.cpp b/light/Light.cpp
index 44507f4..f16c82a 100644
--- a/light/Light.cpp
+++ b/light/Light.cpp
@@ -74,6 +74,10 @@ static uint32_t getBrightness(const LightState& state) {
 }
 
 static inline uint32_t scaleBrightness(uint32_t brightness, uint32_t maxBrightness) {
+    if (brightness == 0) {
+        return 0;
+    }
+
     return (brightness - 1) * (maxBrightness - 1) / (0xFF - 1) + 1;
 }