Postpone magma init until all necessary check have been performed

theano/gpuarray/magma_cholesky.c

@@ -52,26 +52,25 @@ int APPLY_SPECIFIC(magma_cholesky)(PyGpuArrayObject *A, PyGpuArrayObject **L,
                     "GpuMagmaCholesky: unsupported data type");
     return -1;
   }
-
-  // This is early to match the exit() in the fail label.
-  cuda_enter(c->ctx);
-  magma_init();
-
   if (!GpuArray_IS_C_CONTIGUOUS(&A->ga)) {
     PyErr_SetString(PyExc_ValueError,
                     "GpuMagmaCholesky: requires data to be C-contiguous");
-    goto fail;
+    return -1;
   }
   if (PyGpuArray_NDIM(A) != 2) {
     PyErr_SetString(PyExc_ValueError, "GpuMagmaCholesky: matrix rank error");
-    goto fail;
+    return -1;
   }
   dims = PyGpuArray_DIMS(A);
   if (dims[0] != dims[1]) {
     PyErr_SetString(PyExc_ValueError, "GpuMagmaCholesky: matrix is not square");
-    goto fail;
+    return -1;
   }
 
+  // This is early to match the exit() in the fail label.
+  cuda_enter(c->ctx);
+  magma_init();
+
 #ifdef INPLACE
   Py_XDECREF(*L);
   *L = A;

theano/gpuarray/magma_qr.c

@@ -49,7 +49,6 @@ int APPLY_SPECIFIC(magma_qr)(PyGpuArrayObject *A_,
                     "GpuMagmaQR: Unsupported data type");
     return -1;
   }
-
   if (!GpuArray_IS_C_CONTIGUOUS(&A->ga)) {
     PyErr_SetString(PyExc_ValueError,
                     "GpuMagmaQR: requires data to be C-contiguous");
@@ -59,7 +58,6 @@ int APPLY_SPECIFIC(magma_qr)(PyGpuArrayObject *A_,
     PyErr_SetString(PyExc_ValueError, "GpuMagmaQR: matrix rank error");
     return -1;
   }
-
   A = pygpu_copy(A_, GA_F_ORDER);
   if (A == NULL) {
     PyErr_SetString(PyExc_RuntimeError,