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Diffstat (limited to 'src/modules/mavlink/mavlink_main.cpp')
-rw-r--r--src/modules/mavlink/mavlink_main.cpp7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/modules/mavlink/mavlink_main.cpp b/src/modules/mavlink/mavlink_main.cpp
index 647519ea5..e9cce175d 100644
--- a/src/modules/mavlink/mavlink_main.cpp
+++ b/src/modules/mavlink/mavlink_main.cpp
@@ -1903,8 +1903,11 @@ Mavlink::task_main(int argc, char *argv[])
/* if we are passing on mavlink messages, we need to prepare a buffer for this instance */
if (_passing_on || _ftp_on) {
- /* initialize message buffer if multiplexing is on */
- if (OK != message_buffer_init(2 * MAVLINK_MAX_PACKET_LEN)) {
+ /* initialize message buffer if multiplexing is on or its needed for FTP.
+ * make space for two messages plus off-by-one space as we use the empty element
+ * marker ring buffer approach.
+ */
+ if (OK != message_buffer_init(2 * MAVLINK_MAX_PACKET_LEN + 2)) {
errx(1, "can't allocate message buffer, exiting");
}