From 17fa25e5af04b121653bf588b056c1bf49afa104 Mon Sep 17 00:00:00 2001
From: Leah Rowe <leah@libreboot.org>
Date: Thu, 8 Dec 2022 21:29:36 +0000
Subject: [PATCH] util/nvmutil file reads: skip reading if errno!=0

*This condition will probably never be met, but it is theoretically
possible that the code could still fail at this point. Catch all errors,
and exit, ruthlessly.
---
 util/nvmutil/nvmutil.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index ef0a71e6..6df68f93 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -154,6 +154,8 @@ readFromFile(int *fd, uint8_t *buf, const char *path, int flags, size_t size)
 
 	if (errno == ENOTDIR)
 		errno = 0;
+	else if (errno != 0)
+		return -1;
 
 	return read((*fd), buf, size);
 }