From 725be98fe8002b897e137db26453754152f41606 Mon Sep 17 00:00:00 2001
From: Curtis Dunham <Curtis.Dunham@arm.com>
Date: Sat, 27 Sep 2014 09:08:30 -0400
Subject: [PATCH] mem: Provide better diagnostic for unconnected port

When _masterPort is null, a message to that effect is
more helpful than a segfault.
---
 src/mem/port.hh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/mem/port.hh b/src/mem/port.hh
index 8fefb2f3a..28f4d7d68 100644
--- a/src/mem/port.hh
+++ b/src/mem/port.hh
@@ -404,7 +404,11 @@ class SlavePort : public BaseSlavePort
     /**
      * Called by the owner to send a range change
      */
-    void sendRangeChange() const { _masterPort->recvRangeChange(); }
+    void sendRangeChange() const {
+        if (!_masterPort)
+            fatal("%s cannot sendRangeChange() without master port", name());
+        _masterPort->recvRangeChange();
+    }
 
     /**
      * Get a list of the non-overlapping address ranges the owner is
-- 
2.30.2