From 0a81a7a50bc4b73f4075a20fb8c5a74b4ddc82f4 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Wed, 25 Feb 2026 18:01:32 -0500
Subject: [PATCH] [mcp2515] Fix millis overflow in set_mode_ timeout (#14298)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 esphome/components/mcp2515/mcp2515.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/esphome/components/mcp2515/mcp2515.cpp b/esphome/components/mcp2515/mcp2515.cpp
index 1a17715315..77bfaf9224 100644
--- a/esphome/components/mcp2515/mcp2515.cpp
+++ b/esphome/components/mcp2515/mcp2515.cpp
@@ -133,8 +133,8 @@ uint8_t MCP2515::get_status_() {
 canbus::Error MCP2515::set_mode_(const CanctrlReqopMode mode) {
   modify_register_(MCP_CANCTRL, CANCTRL_REQOP, mode);
 
-  uint32_t end_time = millis() + 10;
-  while (millis() < end_time) {
+  uint32_t start_time = millis();
+  while (millis() - start_time < 10) {
     if ((read_register_(MCP_CANSTAT) & CANSTAT_OPMOD) == mode)
       return canbus::ERROR_OK;
   }