Add check for channel count in pcm_open

We need to ensure that this is not set to 0, otherwise audio will not
work properly.

Signed-off-by: Mark Farrugia <mark.farrugia@fiberdyne.com.au>

1 files changed, 4 insertions, 0 deletions

diff --git a/pcm.c b/pcm.c
index ff1b5fc..a62d89a 100644
--- a/pcm.c
+++ b/pcm.c
@@ -84,6 +84,10 @@ static int pcm_open(struct snd_pcm_substream *substream)
 
 	// Setup remaining hw properties
 	chans = stream->channels;
+	if (chans == 0) {
+		D_ERRORK("Channels cannot be 0");
+		return -EINVAL;
+	}
 	hw->channels_min = chans;
 	hw->channels_max = chans;