NFSv4.1: remove GETATTR from ds commits

Any COMMIT compound directed to a data server needs to have the
GETATTR calls suppressed.  We here, make sure the field we are testing
(data->lseg) is set and refcounted correctly.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 6927a18..cae5d16 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1295,6 +1295,7 @@
 {
 	struct nfs_write_data *wdata = data;
 
+	put_lseg(wdata->lseg);
 	put_nfs_open_context(wdata->args.context);
 	nfs_commit_free(wdata);
 }
@@ -1338,7 +1339,8 @@
  * Set up the argument/result storage required for the RPC call.
  */
 static void nfs_init_commit(struct nfs_write_data *data,
-			    struct list_head *head)
+			    struct list_head *head,
+			    struct pnfs_layout_segment *lseg)
 {
 	struct nfs_page *first = nfs_list_entry(head->next);
 	struct inode *inode = first->wb_context->path.dentry->d_inode;
@@ -1350,6 +1352,7 @@
 
 	data->inode	  = inode;
 	data->cred	  = first->wb_context->cred;
+	data->lseg	  = lseg; /* reference transferred */
 	data->mds_ops     = &nfs_commit_ops;
 
 	data->args.fh     = NFS_FH(data->inode);
@@ -1393,7 +1396,7 @@
 		goto out_bad;
 
 	/* Set up the argument struct */
-	nfs_init_commit(data, head);
+	nfs_init_commit(data, head, NULL);
 	return nfs_initiate_commit(data, NFS_CLIENT(inode), data->mds_ops, how);
  out_bad:
 	nfs_retry_commit(head, NULL);