Fix a missing lock around handle_hotplugged_cards().

diff --git a/nageru/mixer.cpp b/nageru/mixer.cpp
index 3b7a99c0319ea567a0f5fcb38f17075ef9d7151d..5f5bc133f8470f6f893661549c566451bd484bd3 100644 (file)
--- a/nageru/mixer.cpp
+++ b/nageru/mixer.cpp
@@ -1289,7 +1289,10 @@ void Mixer::thread_func()
                        assert(master_card_index < MAX_VIDEO_CARDS);
                }
 
-               handle_hotplugged_cards();
+               {
+                       lock_guard<mutex> lock(card_mutex);
+                       handle_hotplugged_cards();
+               }
 
                vector<int32_t> raw_audio[MAX_VIDEO_CARDS];  // For MJPEG encoding.
                OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, master_card_is_output, new_frames, has_new_frame, raw_audio);