From 1089f8fa8f19c8dfff29fe1416bd8ae086873fe9 Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Tue, 20 Oct 2020 13:44:24 +0800
Subject: [PATCH] fix build warning (#2365)

* fix build warning

* Update selfdrive/common/util.c

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>
old-commit-hash: 0bbd080a04bf6373a430811c48345703a9bbc256
---
 selfdrive/common/util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/selfdrive/common/util.c b/selfdrive/common/util.c
index d51bc8c6c6..49f53db33d 100644
--- a/selfdrive/common/util.c
+++ b/selfdrive/common/util.c
@@ -52,7 +52,7 @@ int write_file(const char* path, const void* data, size_t size) {
   }
   ssize_t n = write(fd, data, size);
   close(fd);
-  return n == size ? 0 : -1;
+  return (n >= 0 && (size_t)n == size) ? 0 : -1;
 }
 
 void set_thread_name(const char* name) {