diff --git a/drivers/staging/comedi/drivers/cb_pcidas64.c b/drivers/staging/comedi/drivers/cb_pcidas64.c
index 3b98193de0a4a0fad895696bc9277be671adecb3..b761f000c1dc2ff158eb6586a2dca7ad870e879e 100644
--- a/drivers/staging/comedi/drivers/cb_pcidas64.c
+++ b/drivers/staging/comedi/drivers/cb_pcidas64.c
@@ -1417,9 +1417,7 @@ static int set_ai_fifo_size(struct comedi_device *dev, unsigned int num_samples)
 	if (retval < 0)
 		return retval;
 
-	num_samples = retval * fifo->num_segments * fifo->sample_packing_ratio;
-
-	return num_samples;
+	return retval * fifo->num_segments * fifo->sample_packing_ratio;
 }
 
 /* query length of fifo */