From 7dcc4766377b99c60db60328c21a3990db132268 Mon Sep 17 00:00:00 2001
From: Jeffrey Altman <jaltman@your-file-system.com>
Date: Thu, 1 Sep 2011 09:51:06 -0400
Subject: [PATCH] Windows: buf_SetDirty do nothing if length is zero

Change-Id: Id6a96feadccc437900e944ab23b45d2717766e1c
Reviewed-on: http://gerrit.openafs.org/5358
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
---
 src/WINNT/afsd/cm_buf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/WINNT/afsd/cm_buf.c b/src/WINNT/afsd/cm_buf.c
index 5c633b3d8e..a08f3ec7a6 100644
--- a/src/WINNT/afsd/cm_buf.c
+++ b/src/WINNT/afsd/cm_buf.c
@@ -1351,6 +1351,9 @@ void buf_SetDirty(cm_buf_t *bp, afs_uint32 offset, afs_uint32 length, cm_user_t
     osi_assertx(bp->magic == CM_BUF_MAGIC, "invalid cm_buf_t magic");
     osi_assertx(bp->refCount > 0, "cm_buf_t refcount 0");
 
+    if (length == 0)
+        return;
+
     if (bp->flags & CM_BUF_DIRTY) {
 
 	osi_Log1(buf_logp, "buf_SetDirty 0x%p already dirty", bp);