From 51c61c354cb14f6cb769fd0c39b617c0ac379b26 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 14 Mar 2026 17:13:52 -1000
Subject: [PATCH] [ethernet] Add LwIPLock to get_ip_addresses() on RP2040

localIP() reads netif->ip_addr which can be mutated by DHCP
callbacks from IRQ context. Lock for consistency since this is
called from API responses, not just hot-loop polling.
---
 esphome/components/ethernet/ethernet_component_rp2040.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/esphome/components/ethernet/ethernet_component_rp2040.cpp b/esphome/components/ethernet/ethernet_component_rp2040.cpp
index c4f7aceac8e..f47f57cb326 100644
--- a/esphome/components/ethernet/ethernet_component_rp2040.cpp
+++ b/esphome/components/ethernet/ethernet_component_rp2040.cpp
@@ -180,6 +180,7 @@ void EthernetComponent::dump_config() {
 network::IPAddresses EthernetComponent::get_ip_addresses() {
   network::IPAddresses addresses;
   if (this->eth_ != nullptr) {
+    LwIPLock lock;
     addresses[0] = network::IPAddress(this->eth_->localIP());
   }
   return addresses;