diff --git a/drivers/staging/comedi/drivers/cb_das16_cs.c b/drivers/staging/comedi/drivers/cb_das16_cs.c
index 95fa7e2fea9d..58d45299bf85 100644
--- a/drivers/staging/comedi/drivers/cb_das16_cs.c
+++ b/drivers/staging/comedi/drivers/cb_das16_cs.c
@@ -136,8 +136,6 @@ static int das16cs_ai_rinsn(struct comedi_device *dev,
 	case 3:
 		devpriv->status2 |= 0x200;
 		break;
-	default:
-		return -EINVAL;
 	}
 	outw(devpriv->status2, dev->iobase + DAS16CS_MISC2);