autograd.patch

From 62adfff8c43c3dcd8a175fc7072f3d76d40b0a10 Mon Sep 17 00:00:00 2001
From: Adam Paszke <adam.paszke@gmail.com>
Date: Wed, 5 Apr 2017 14:17:49 -0700
Subject: [PATCH] tmp

---
 torch/autograd/function.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/torch/autograd/function.py b/torch/autograd/function.py
index 8ad6805..f34af71 100644
--- a/torch/autograd/function.py
+++ b/torch/autograd/function.py
@@ -187,9 +187,15 @@ def once_differentiable(fn):
         tensor_args = [arg.data if isinstance(arg, Variable) else arg
                        for arg in args]
         outputs = fn(ctx, *tensor_args)
+        volatile = any(arg.volatile if isinstance(arg, Variable) else False
+                for arg in args)
+        if volatile:
+            kwargs = {'volatile': True}
+        else:
+            kwargs = {'_grad_fn': Error()}
         if not isinstance(outputs, tuple):
-            return Variable(outputs, _grad_fn=Error()) if outputs is not None else None
-        return tuple([Variable(o, _grad_fn=Error()) if o is not None else None
+            return Variable(outputs, **kwargs) if outputs is not None else None
+        return tuple([Variable(o, **kwargs) if o is not None else None
                       for o in outputs])
     return wrapper

--
2.9.3