nfs/filelayout: use pnfs_error_mark_layout_for_return

Instead of calling layoutreturn directly, call pnfs_error_mark_layout_for_return
to mark layouts for return and let generic code return layout when
layout segments are freed.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>

Conflicts:
	fs/nfs/filelayout/filelayout.c

fs/nfs/filelayout/filelayout.c

@@ -200,7 +200,7 @@ static int filelayout_async_handle_error(struct rpc_task *task,
 		dprintk("%s DS connection error %d\n", __func__,
 			task->tk_status);
 		nfs4_mark_deviceid_unavailable(devid);
-		set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
+		pnfs_error_mark_layout_for_return(inode, lseg);
 		rpc_wake_up(&tbl->slot_tbl_waitq);
 		/* fall through */
 	default:

fs/nfs/pnfs_nfs.c

@@ -18,20 +18,10 @@
 
 #define NFSDBG_FACILITY		NFSDBG_PNFS
 
-static void pnfs_generic_fenceme(struct inode *inode,
-				 struct pnfs_layout_hdr *lo)
-{
-	if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
-		return;
-	pnfs_return_layout(inode);
-}
-
 void pnfs_generic_rw_release(void *data)
 {
 	struct nfs_pgio_header *hdr = data;
-	struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout;
 
-	pnfs_generic_fenceme(lo->plh_inode, lo);
 	nfs_put_client(hdr->ds_clp);
 	hdr->mds_ops->rpc_release(data);
 }