From 2e6063495f32536a84f2ce9981451e268b5fb892 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Tue, 28 Dec 2021 19:08:34 +1100
Subject: [PATCH] AP_BattMonitor: fixed a segv with BATT_MONITOR=14

this causes a hang on boot on some boards
---
 libraries/AP_BattMonitor/AP_BattMonitor_SMBus_SUI.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_SUI.cpp b/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_SUI.cpp
index e975523bcf..d58e229856 100644
--- a/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_SUI.cpp
+++ b/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_SUI.cpp
@@ -23,12 +23,14 @@ AP_BattMonitor_SMBus_SUI::AP_BattMonitor_SMBus_SUI(AP_BattMonitor &mon,
       cell_count(_cell_count)
 {
     _pec_supported = false;
-    _dev->set_retries(2);
 }
 
 void AP_BattMonitor_SMBus_SUI::init(void)
 {
     AP_BattMonitor_SMBus::init();
+    if (_dev) {
+        _dev->set_retries(2);
+    }
     if (_dev && timer_handle) {
         // run twice as fast for two phases
         _dev->adjust_periodic_callback(timer_handle, 50000);