[U-Boot] [PATCH] fw_env: Add missing write failure check

[Alex Kiernan]

If flash_write fails, whilst we propagate this up to our caller, we need
to avoid swapping in the new file (if we're on a filesystem) in this
case.

Fixes: dbc34323796b ("tools: env: Implement atomic replace for filesystem")
Signed-off-by: Alex Kiernan <alex.kiernan at gmail.com>
---

 tools/env/fw_env.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
index cfada0ee1157..eef12dd2b757 100644
--- a/tools/env/fw_env.c
+++ b/tools/env/fw_env.c
@@ -1317,7 +1317,7 @@ static int flash_io_write(int fd_current)
 			rc = -1;
 		}
 
-		if (target_temp) {
+		if (rc >= 0 && target_temp) {
 			int dir_fd;
 
 			dir_fd = open(dname, O_DIRECTORY | O_RDONLY);
-- 
2.17.1