From 5a125fc7d65d00fb449ece70d7a2bbf6e2fe748a Mon Sep 17 00:00:00 2001
From: Andrew Chan <email@suspi.net>
Date: Mon, 2 Mar 2020 09:04:49 -0800
Subject: [PATCH] Adding error checking to only use the cached fp if they're
 valid (#1182)

old-commit-hash: 5e9daf2471d467ac0dfbc4dd3553c1f5916794ee
---
 selfdrive/car/car_helpers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/selfdrive/car/car_helpers.py b/selfdrive/car/car_helpers.py
index ff00e9b90..e99d61e4c 100644
--- a/selfdrive/car/car_helpers.py
+++ b/selfdrive/car/car_helpers.py
@@ -76,7 +76,7 @@ def fingerprint(logcan, sendcan, has_relay):
       if cached_params.carName == "mock":
         cached_params = None
 
-    if cached_params is not None:
+    if cached_params is not None and len(cached_params.carFw) > 0 and cached_params.carVin is not VIN_UNKNOWN:
       cloudlog.warning("Using cached CarParams")
       vin = cached_params.carVin
       car_fw = list(cached_params.carFw)