From 6480258ab0432d3a09ef884d4cc49e11f8c3ccee Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@suse.de>
Date: Thu, 2 Feb 2006 09:23:56 +0100
Subject: [PATCH] [PATCH] blktrace: make write_data() return early with buflen
 == 0

---
 blktrace.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/blktrace.c b/blktrace.c
index 024675b..8601194 100644
--- a/blktrace.c
+++ b/blktrace.c
@@ -407,6 +407,9 @@ static int write_data(struct thread_information *tip,
 {
 	int ret;
 
+	if (!buf_len)
+		return 0;
+
 	while (1) {
 		ret = fwrite(buf, buf_len, 1, tip->ofile);
 		if (ret == 1)
-- 
2.25.1