o3: Fix for retry ID bug.

It should be cleared prior to the call to recvRetry.
Add extra DPRINTF statement for clearer debugging output.

--HG--
extra : convert_revision : e2332754743f42d60e159ac89f6fb0fd8b7f57f8

src/cpu/o3/lsq_impl.hh

@@ -101,10 +101,11 @@ LSQ<Impl>::DcachePort::recvRetry()
         //Squashed, so drop it
         return;
     }
-    lsq->thread[lsq->retryTid].recvRetry();
+    int curr_retry_tid = lsq->retryTid;
     // Speculatively clear the retry Tid.  This will get set again if
     // the LSQUnit was unable to complete its access.
     lsq->retryTid = -1;
+    lsq->thread[curr_retry_tid].recvRetry();
 }
 
 template <class Impl>

src/cpu/o3/lsq_unit_impl.hh

@@ -928,6 +928,7 @@ void
 LSQUnit<Impl>::recvRetry()
 {
     if (isStoreBlocked) {
+        DPRINTF(LSQUnit, "Receiving retry: store blocked\n");
         assert(retryPkt != NULL);
 
         if (dcachePort->sendTiming(retryPkt)) {