merge in nyc-mr2-release history after reset to nyc-mr2-dev
diff --git a/camera/QCamera2/HAL3/QCamera3HWI.cpp b/camera/QCamera2/HAL3/QCamera3HWI.cpp
index e4782aa..26c9acd 100644
--- a/camera/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/camera/QCamera2/HAL3/QCamera3HWI.cpp
@@ -9485,7 +9485,9 @@
     for (List<stream_info_t *>::iterator it = mStreamInfo.begin();
         it != mStreamInfo.end(); it++) {
         QCamera3Channel *channel = (QCamera3Channel *)(*it)->stream->priv;
-        channel->stop();
+        if (channel != nullptr) {
+            channel->stop();
+        }
         (*it)->status = INVALID;
     }