# Node ID 3147f3a868f79f5094d1cf7b1d2dbd77bf034ac1
# Parent  3d17366c0423a59478ae63d40c8feeea34df218a
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh
--- a/src/mem/cache/cache_impl.hh
+++ b/src/mem/cache/cache_impl.hh
@@ -1739,6 +1739,14 @@
             PacketPtr wb_pkt = mshr->getTarget()->pkt;
             assert(wb_pkt->cmd == MemCmd::Writeback);
 
+            // Squash prefetch requests from below on write buffer hits
+            if (pkt->cmd == MemCmd::HardPFReq) {
+                DPRINTF(Cache, "Squashing prefetch from lower cache on "
+                        "write buffer hit %#x\n", pkt->getAddr());
+                pkt->setPrefetchSquashed();
+                return;
+            }
+
             assert(!pkt->memInhibitAsserted());
             pkt->assertMemInhibit();
             if (!pkt->needsExclusive()) {