pnfs/flexfiles: Do not dprintk after the free

Found by 0-DAY kernel test infrastructure:

fs/nfs/flexfilelayout/flexfilelayoutdev.c:520:13-16: ERROR: reference preceded by free on line 518
fs/nfs/flexfilelayout/flexfilelayoutdev.c:520:26-29: ERROR: reference preceded by free on line 518
fs/nfs/flexfilelayout/flexfilelayoutdev.c:520:39-42: ERROR: reference preceded by free on line 518
fs/nfs/flexfilelayout/flexfilelayoutdev.c:521:3-6: ERROR: reference preceded by free on line 518
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/flexfilelayout/flexfilelayoutdev.c

@@ -515,10 +515,10 @@ int ff_layout_encode_ds_ioerr(struct nfs4_flexfile_layout *flo,
 		*p++ = cpu_to_be32(err->opnum);
 		*count += 1;
 		list_del(&err->list);
-		kfree(err);
 		dprintk("%s: offset %llu length %llu status %d op %d count %d\n",
 			__func__, err->offset, err->length, err->status,
 			err->opnum, *count);
+		kfree(err);
 	}
 
 	return 0;