Remove the error handling code from the shutdown() path since it's

theano/sandbox/cuda/cuda_ndarray.cu

@@ -3033,7 +3033,7 @@ CudaNdarray_ptr_int_size(PyObject* _unused, PyObject* args)
 }
 
 static int cublas_init();
-static int cublas_shutdown();
+static void cublas_shutdown();
 // Initialize the gpu.
 // Takes one optional parameter, the device number.
 // If provided, it sets that device to be the active device.
@@ -3091,10 +3091,6 @@ CudaNdarray_gpu_init(PyObject* _unused, PyObject* args)
     }
 
     if(card_number_provided) {
-        if (handle != NULL)
-            if (cublas_shutdown() == -1)
-                return NULL;
-
         err = cudaSetDevice(card_nb);
         if(cudaSuccess != err) {
             return PyErr_Format(PyExc_EnvironmentError,
@@ -3135,7 +3131,6 @@ PyObject *
 CudaNdarray_gpu_shutdown(PyObject* _unused, PyObject* _unused_args) {
     // Don't handle errors here
     cublas_shutdown();
-    handle = NULL;
     cudaThreadExit();
     g_gpu_context_active = 0; // context has now been closed down
     Py_INCREF(Py_None);
@@ -3584,20 +3579,13 @@ cublas_init()
     return 0;
 }
 
-static int
+static void
 cublas_shutdown()
 {
-    cublasStatus_t err;
-    err = cublasDestroy(handle);
-    if (CUBLAS_STATUS_SUCCESS != err)
-    {
-        PyErr_SetString(PyExc_RuntimeError,
-                        "cublas_init tried to destroy the old cublas"
-                        " context, cublasDestroy() returned an error.");
-        return -1;
-    }
+    if (handle != NULL)
+        cublasDestroy(handle);
+    // No point in handling any errors here
     handle = NULL;
-    return 0;
 }
 
 int