From 2253dd3c48e21abb82fe161d6f58237490111206 Mon Sep 17 00:00:00 2001
From: George Hotz <george@comma.ai>
Date: Fri, 13 Apr 2018 20:11:01 +0000
Subject: [PATCH] fix volt ign detect

---
 board/main.c             | 2 +-
 board/safety/safety_gm.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/board/main.c b/board/main.c
index 671641afe47a8e..a15861a17e5c82 100644
--- a/board/main.c
+++ b/board/main.c
@@ -110,7 +110,7 @@ int get_health_pkt(void *dat) {
     health->started = (GPIOA->IDR & (1 << 1)) == 0;
   } else {
     //Current safety hooks want to determine ignition (ex: GM)
-    health-> started = safety_ignition;
+    health->started = safety_ignition;
   }
 #else
   health->current = 0;
diff --git a/board/safety/safety_gm.h b/board/safety/safety_gm.h
index 40fc14d54c8536..03c36d6255dcbf 100644
--- a/board/safety/safety_gm.h
+++ b/board/safety/safety_gm.h
@@ -19,6 +19,7 @@ int gm_ascm_detected = 0;
 int gm_ignition_started = 0;
 
 static void gm_rx_hook(CAN_FIFOMailBox_TypeDef *to_push) {
+  int bus_number = (to_push->RDTR >> 4) & 0xFF;
   uint32_t addr;
   if (to_push->RIR & 4) {
     // Extended
@@ -30,7 +31,7 @@ static void gm_rx_hook(CAN_FIFOMailBox_TypeDef *to_push) {
     addr = to_push->RIR >> 21;
   }
 
-  if (addr == 0x135) {
+  if (addr == 0x135 && bus_number == 0) {
     //Gear selector (used for determining ignition)
     int gear = to_push->RDLR & 0x7;
     gm_ignition_started = gear > 0; //Park = 0. If out of park, we're "on."
@@ -43,7 +44,6 @@ static void gm_rx_hook(CAN_FIFOMailBox_TypeDef *to_push) {
   }
 
   // check if stock ASCM ECU is still online
-  int bus_number = (to_push->RDTR >> 4) & 0xFF;
   if (bus_number == 0 && addr == 715) {
     gm_ascm_detected = 1;
     controls_allowed = 0;