From 4f6fe3389eb97e2939753a4a502eb1664a81b459 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Tue, 18 Jan 2022 06:44:49 +1100
Subject: [PATCH] AP_Filesystem: fixed a param ftp bug

if param count changes we need to zero the file size
---
 libraries/AP_Filesystem/AP_Filesystem_Param.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libraries/AP_Filesystem/AP_Filesystem_Param.cpp b/libraries/AP_Filesystem/AP_Filesystem_Param.cpp
index 3ab8d687f3..5d3203227c 100644
--- a/libraries/AP_Filesystem/AP_Filesystem_Param.cpp
+++ b/libraries/AP_Filesystem/AP_Filesystem_Param.cpp
@@ -56,6 +56,7 @@ int AP_Filesystem_Param::open(const char *fname, int flags)
     r.start = 0;
     r.count = 0;
     r.read_size = 0;
+    r.file_size = 0;
     r.writebuf = nullptr;
     if (!read_only) {
         // setup for upload