diff -r 18e4f5e805a8 -r 811b03544777 src/mem/cache/cache_impl.hh
--- a/src/mem/cache/cache_impl.hh	Fri May 18 17:11:28 2012 +0100
+++ b/src/mem/cache/cache_impl.hh	Fri May 18 17:12:39 2012 +0100
@@ -1263,12 +1263,8 @@
 void
 Cache<TagStore>::snoopTiming(PacketPtr pkt)
 {
-    // Note that some deferred snoops don't have requests, since the
-    // original access may have already completed
-    if ((pkt->req && pkt->req->isUncacheable()) ||
-        pkt->cmd == MemCmd::Writeback) {
-        //Can't get a hit on an uncacheable address
-        //Revisit this for multi level coherence
+    if (pkt->cmd == MemCmd::Writeback) {
+        // Nothing to do for writebacks
         return;
     }
 
@@ -1347,10 +1343,9 @@
 Tick
 Cache<TagStore>::snoopAtomic(PacketPtr pkt)
 {
-    if (pkt->req->isUncacheable() || pkt->cmd == MemCmd::Writeback) {
-        // Can't get a hit on an uncacheable address
-        // Revisit this for multi level coherence
-        return hitLatency;
+    if (pkt->cmd == MemCmd::Writeback) {
+        // Nothing to do for writebacks
+        return 0;
     }
 
     BlkType *blk = tags->findBlock(pkt->getAddr());