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mem: Fix bug in cache request retry mechanism

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This patch ensures that inhibited packets that are about to be turned
into express snoops do not update the retry flag in the cache.
This commit is contained in:
Andreas Hansson 2015-01-20 08:12:01 -05:00
parent da0c770943
commit 6096e2f9c1
1 changed files with 7 additions and 4 deletions
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11
src/mem/cache/cache_impl.hh vendored
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@ -2029,11 +2029,14 @@ Cache<TagStore>::CpuSidePort::recvTimingReq(PacketPtr pkt)
bool success = false;
// always let inhibited requests through, even if blocked
// always let inhibited requests through, even if blocked,
// ultimately we should check if this is an express snoop, but at
// the moment that flag is only set in the cache itself
if (pkt->memInhibitAsserted()) {
// this should always succeed
success = cache->recvTimingReq(pkt);
assert(success);
// do not change the current retry state
bool M5_VAR_USED bypass_success = cache->recvTimingReq(pkt);
assert(bypass_success);
return true;
} else if (blocked || mustSendRetry) {
// either already committed to send a retry, or blocked
success = false;