From 0b9a36d142f2ce67c6f05848b949a2d7b34edaf8 Mon Sep 17 00:00:00 2001
From: Sergey Nikitenko <s.nikitenko@me.com>
Date: Fri, 12 Mar 2021 21:44:53 +0300
Subject: [PATCH] stm32l4 fix tim channel range checking

---
 arch/arm/src/stm32l4/stm32l4_tim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/src/stm32l4/stm32l4_tim.c b/arch/arm/src/stm32l4/stm32l4_tim.c
index d3bb3a55bd..0349482a48 100644
--- a/arch/arm/src/stm32l4/stm32l4_tim.c
+++ b/arch/arm/src/stm32l4/stm32l4_tim.c
@@ -1127,7 +1127,7 @@ static int stm32l4_tim_setchannel(FAR struct stm32l4_tim_dev_s *dev,
 
   /* Further we use range as 0..3; if channel=0 it will also overflow here */
 
-  if (--channel > 4)
+  if (--channel > 3)
     {
       return -EINVAL;
     }