Patch "nfs: don't create zero-length requests" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

    nfs: don't create zero-length requests

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     nfs-don-t-create-zero-length-requests.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let [off-list ref] know about it.

From 149a4fddd0a72d526abbeac0c8deaab03559836a Mon Sep 17 00:00:00 2001

From: Benjamin Coddington <redacted>
Date: Mon, 18 Jul 2016 10:41:57 -0400
Subject: nfs: don't create zero-length requests

From: Benjamin Coddington <redacted>

commit 149a4fddd0a72d526abbeac0c8deaab03559836a upstream.

NFS doesn't expect requests with wb_bytes set to zero and may make
unexpected decisions about how to handle that request at the page IO layer.
Skip request creation if we won't have any wb_bytes in the request.

Signed-off-by: Benjamin Coddington <redacted>
Signed-off-by: Alexey Dobriyan <redacted>
Reviewed-by: Weston Andros Adamson <redacted>
Signed-off-by: Trond Myklebust <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfs/write.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c

@@ -1261,6 +1261,9 @@ int nfs_updatepage(struct file *file, st
 	dprintk("NFS:       nfs_updatepage(%pD2 %d@%lld)\n",
 		file, count, (long long)(page_file_offset(page) + offset));
 
+	if (!count)
+		goto out;
+
 	if (nfs_can_extend_write(file, page, inode)) {
 		count = max(count + offset, nfs_page_length(page));
 		offset = 0;

@@ -1271,7 +1274,7 @@ int nfs_updatepage(struct file *file, st
 		nfs_set_pageerror(page);
 	else
 		__set_page_dirty_nobuffers(page);
-
+out:
 	dprintk("NFS:       nfs_updatepage returns %d (isize %lld)\n",
 			status, (long long)i_size_read(inode));
 	return status;

Patches currently in stable-queue which might be from bcodding@redhat.com are

queue-4.4/nfs-don-t-create-zero-length-requests.patch