- serial lockup fix

diff --git a/tos/lib/serial/SerialDispatcherP.nc b/tos/lib/serial/SerialDispatcherP.nc
index e2afe5aff699d13305b86140b9bbde648e0602b4..fd2946b19ab33424ad271e944c92bd1980b85825 100644 (file)
--- a/tos/lib/serial/SerialDispatcherP.nc
+++ b/tos/lib/serial/SerialDispatcherP.nc
@@ -294,6 +294,9 @@ implementation {
         receiveTaskSize = recvIndex;
         receiveBufferSwap();
         receiveState.state = RECV_STATE_IDLE;
+      } else {
+        // we can't deliver the packet, better free the current buffer.
+        unlockBuffer(receiveState.which);
       }
     }
     if (postsignalreceive){