Fix hipBusBW sample for P2P bidirectional test

[ROCm/hip commit: 70278f1777]

projects/hip/samples/1_Utils/hipBusBandwidth/hipBusBandwidth.cpp

@@ -812,6 +812,7 @@ void RunBenchmark_P2P_Bidir(ResultDatabase& resultDB) {
             hipSetDevice(currentGpu);
             hipMalloc((void**)&currentGpuMem[0], sizeof(float) * numMaxFloats);
             hipMalloc((void**)&currentGpuMem[1], sizeof(float) * numMaxFloats);
+            enablePeer2Peer(peerGpu,currentGpu);
 
             hipSetDevice(peerGpu);
             hipMalloc((void**)&peerGpuMem[0], sizeof(float) * numMaxFloats);
@@ -899,6 +900,7 @@ void RunBenchmark_P2P_Bidir(ResultDatabase& resultDB) {
             }
 
             disablePeer2Peer(currentGpu, peerGpu);
+            disablePeer2Peer(peerGpu, currentGpu);
 
             hipEventDestroy(start);
             hipEventDestroy(stop);