Patch "nfs: don't create zero-length requests" has been added to the 4.7-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 4.7-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-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

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

From: Benjamin Coddington <[email protected]>

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.

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

@@ -1289,6 +1289,9 @@ 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;

@@ -1299,7 +1302,7 @@ 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 [email protected] are

queue-4.7/nfs-don-t-create-zero-length-requests.patch