From cc09e77a94e6e2502c9aba8572984370a55b93f7 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 18 Oct 2017 10:17:55 -0600
Subject: [PATCH] fs/vfs:  Fix after recent changes.  write() was return
 negative values in errno. Noted by Jussi Kivilinna.

---
 fs/vfs/fs_write.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/vfs/fs_write.c b/fs/vfs/fs_write.c
index f5f9f47438..4d62cb0d98 100644
--- a/fs/vfs/fs_write.c
+++ b/fs/vfs/fs_write.c
@@ -246,7 +246,7 @@ ssize_t write(int fd, FAR const void *buf, size_t nbytes)
   ret = nx_write(fd, buf, nbytes);
   if (ret < 0)
     {
-      set_errno(ret);
+      set_errno(-ret);
       ret = ERROR;
     }