Patch "NFS: Fix initialization of nfs_page_array->npages" has been added to the 4.12-stable tree

Patch "NFS: Fix initialization of nfs_page_array->npages" has been added to the 4.12-stable tree

[gregkh]

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

    NFS: Fix initialization of nfs_page_array->npages

to the 4.12-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-fix-initialization-of-nfs_page_array-npages.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 2eb3aea7d9c43325a12df312adfc7fb25bbd636b Mon Sep 17 00:00:00 2001
From: Benjamin Coddington <bcodding@redhat.com>
Date: Fri, 9 Jun 2017 11:03:23 -0400
Subject: NFS: Fix initialization of nfs_page_array->npages

From: Benjamin Coddington <bcodding@redhat.com>

commit 2eb3aea7d9c43325a12df312adfc7fb25bbd636b upstream.

Commit 8ef9b0b9e1c0 open-coded nfs_pgarray_set(), and left out the
initialization of the nfs_page_array's npages.  This mistake didn't show up
until testing with block layouts, and there shows that all pNFS reads
return -EIO.

Fixes: 8ef9b0b9e1c0 ("NFS: move nfs_pgarray_set() to open code")
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfs/pagelist.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -779,6 +779,7 @@ int nfs_generic_pgio(struct nfs_pageio_d
 	gfp_t gfp_flags = GFP_KERNEL;
 
 	pagecount = nfs_page_array_len(mirror->pg_base, mirror->pg_count);
+	pg_array->npages = pagecount;
 
 	if (pagecount <= ARRAY_SIZE(pg_array->page_array))
 		pg_array->pagevec = pg_array->page_array;


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

queue-4.12/nfs-fix-initialization-of-nfs_page_array-npages.patch