From: Steve Reinhardt <steve.reinhardt@amd.com>
Date: Sun, 4 Oct 2009 01:07:39 +0000 (-0700)
Subject: bus: add assertion to catch illegal retry
X-Git-Tag: stable_2012_02_02~1714
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8a761c44af607c1a05642d32cbaa6b97106e6b7d;p=gem5.git

bus: add assertion to catch illegal retry
on mem-inhibited transaction.
---

diff --git a/src/mem/bus.cc b/src/mem/bus.cc
index 001c37a24..cac08d1a8 100644
--- a/src/mem/bus.cc
+++ b/src/mem/bus.cc
@@ -244,6 +244,9 @@ Bus::recvTiming(PacketPtr pkt)
             // Packet not successfully sent. Leave or put it on the retry list.
             // illegal to block responses... can lead to deadlock
             assert(!pkt->isResponse());
+            // It's also illegal to force a transaction to retry after
+            // someone else has committed to respond.
+            assert(!pkt->memInhibitAsserted());
             DPRINTF(Bus, "recvTiming: src %d dst %d %s 0x%x TGT RETRY\n",
                     src, pkt->getDest(), pkt->cmdString(), pkt->getAddr());
             addToRetryList(src_port);