NFS: fix return value of nfs_pagein_one/nfs_flush_one

Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 248a554..581534a4 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -351,12 +351,13 @@
 	struct nfs_read_data	*data;
 	struct list_head *head = &desc->pg_list;
 	struct pnfs_layout_segment *lseg = desc->pg_lseg;
-	int ret = -ENOMEM;
+	int ret = 0;
 
 	data = nfs_readdata_alloc(nfs_page_array_len(desc->pg_base,
 						     desc->pg_count));
 	if (!data) {
 		nfs_async_read_error(head);
+		ret = -ENOMEM;
 		goto out;
 	}