From a7b5287990a8ca9c90f125ab913b07b07c364f7c Mon Sep 17 00:00:00 2001
From: "Wesley W. Terpstra" <w.terpstra@gsi.de>
Date: Tue, 8 May 2012 18:17:11 +0200
Subject: [PATCH] Don't waste time writing 0 bytes, even if the user asks.
---
api/format/master.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/api/format/master.c b/api/format/master.c
index 0be84a5..9ead282 100644
--- a/api/format/master.c
+++ b/api/format/master.c
@@ -544,7 +544,9 @@ eb_status_t eb_device_flush(eb_device_t devicep) {
link = EB_LINK(device->link);
if (mtu == 0) {
- (*tops->send)(transport, link, &buffer[0], wptr - &buffer[0]);
+ if (wptr != &buffer[0]) {
+ (*tops->send)(transport, link, &buffer[0], wptr - &buffer[0]);
+ }
} else {
if (wptr != &buffer[header_alignment]) {
if (has_reads == 0) buffer[2] |= EB_HEADER_NR;
--
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