From 232d367461432df21d9601a66aa8bf44580f16e9 Mon Sep 17 00:00:00 2001
From: andig <andi@evcc.io>
Date: Mon, 10 Aug 2026 17:25:08 +0200
Subject: [PATCH] chore: don't guard connection settings with the registry
 mutex (#32695)

---
 util/modbus/modbus.go | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/util/modbus/modbus.go b/util/modbus/modbus.go
index c332d41f6..7e66db687 100644
--- a/util/modbus/modbus.go
+++ b/util/modbus/modbus.go
@@ -104,7 +104,7 @@ type meterConnection struct {
 	proto Protocol
 	refs  int // count of references; first connection has ref count 0
 
-	// largest value requested by any of the sharing logical connections
+	mu           sync.Mutex
 	delay        time.Duration
 	connectDelay time.Duration
 	timeout      time.Duration
@@ -114,23 +114,23 @@ type meterConnection struct {
 
 // setDelay applies the delay if larger than the current value
 func (c *meterConnection) setDelay(delay time.Duration) {
-	mu.Lock()
-	defer mu.Unlock()
+	c.mu.Lock()
+	defer c.mu.Unlock()
 
 	c.delay = max(c.delay, delay)
 }
 
 func (c *meterConnection) getDelay() time.Duration {
-	mu.Lock()
-	defer mu.Unlock()
+	c.mu.Lock()
+	defer c.mu.Unlock()
 
 	return c.delay
 }
 
 // setConnectDelay applies the connect delay if larger than the current value
 func (c *meterConnection) setConnectDelay(delay time.Duration) {
-	mu.Lock()
-	defer mu.Unlock()
+	c.mu.Lock()
+	defer c.mu.Unlock()
 
 	if delay > c.connectDelay {
 		c.connectDelay = delay
@@ -140,8 +140,8 @@ func (c *meterConnection) setConnectDelay(delay time.Duration) {
 
 // setTimeout applies the timeout if larger than the current value
 func (c *meterConnection) setTimeout(timeout time.Duration) {
-	mu.Lock()
-	defer mu.Unlock()
+	c.mu.Lock()
+	defer c.mu.Unlock()
 
 	if timeout > c.timeout {
 		c.timeout = timeout