COMPMID-2098: Scope handling of memory group resources.

Change-Id: Ie945526bd7845301458039edf3129253c1808505
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/938
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/NEON/functions/NERNNLayer.cpp b/src/runtime/NEON/functions/NERNNLayer.cpp
index 995d5ee..9ca7ded 100644
--- a/src/runtime/NEON/functions/NERNNLayer.cpp
+++ b/src/runtime/NEON/functions/NERNNLayer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -104,7 +104,7 @@
 {
     prepare();
 
-    _memory_group.acquire();
+    MemoryGroupResourceScope scope_mg(_memory_group);
 
     _fully_connected_kernel.run();
 
@@ -115,8 +115,6 @@
 
     // copy hidden out to output
     NEScheduler::get().schedule(&_copy_kernel, Window::DimY);
-
-    _memory_group.release();
 }
 
 void NERNNLayer::prepare()