match behavior

old-commit-hash: 5f24167c58caf98b641af2f63f839015e404c349

selfdrive/pandad/pandad.py

@@ -5,6 +5,7 @@ import usb1
 import time
 import signal
 import subprocess
+import sys
 from typing import NoReturn
 
 from panda import Panda, PandaDFU, PandaProtocolMismatch, FW_PATH
@@ -172,5 +173,7 @@ def main() -> NoReturn:
     os.chdir(os.path.join(BASEDIR, "selfdrive/pandad"))
     subprocess.run(["./pandad", *panda_serials], check=True)
 
+  sys.exit(1)
+
 if __name__ == "__main__":
   main()