Disable average_exc_pad pooling for cudnn v3

theano/sandbox/cuda/dnn.py

@@ -1401,6 +1401,9 @@ class GpuDnnPoolDesc(GpuOp):
             raise RuntimeError("CuDNN pooling with padding requires CuDNN v2")
         if self.get_ndim() == 3 and version() < (3000, 3000):
             raise RuntimeError("CuDNN 3d pooling requires CuDNN v3")
+        if mode == 'average_exc_pad' and version() < (4004, 4004):
+            raise RuntimeError(
+                "CuDNN pooling mode 'average_exc_pad' requires at least v4")
 
     def get_ndim(self):
         return len(self.ws)

theano/sandbox/gpuarray/dnn.py

@@ -953,6 +953,9 @@ class GpuDnnPoolDesc(Op):
 
         if self.get_ndim() == 3 and version() < 3000:
             raise RuntimeError("CuDNN 3d pooling requires v3")
+        if mode == 'average_exc_pad' and version() < 4004:
+            raise RuntimeError(
+                "CuDNN pooling mode 'average_exc_pad' requires at least v4")
 
     def get_ndim(self):
         return len(self.ws)