1 files changed, 5 insertions, 0 deletions

diff --git a/pcm.c b/pcm.c
index a62d89a..e91b121 100644
--- a/pcm.c
+++ b/pcm.c
@@ -67,6 +67,11 @@ static int pcm_open(struct snd_pcm_substream *substream)
 	struct snd_pcm_hardware *hw;
 	unsigned int chans = 0;
 
+	if (!snd_avirt_streams_sealed()) {
+		D_ERRORK("Cannot open PCM. Card is not sealed");
+		return -EPERM;
+	}
+
 	// Find the Audio Path mapped to this device
 	stream = snd_avirt_stream_find_by_device(substream->pcm->device);
 	if (IS_ERR_VALUE(stream) || !stream)