NFS: Fix initialization of nfs_page_array->npages

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>
Cc: stable@vger.kernel.org # 4.12
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 83d2918f1b134a8f80fda1ce4a2a77a9d9262681..8a23e2b40b04e9f1c6d8bb3aec97fe10086f514a 100644 (file)
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -779,6 +779,7 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
        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;