diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
index bf7e20492b28..d8f014563c1e 100644
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -1886,31 +1886,16 @@ static int s626_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s
 		err++;
 	}
 
-	if (cmd->start_src == TRIG_EXT && cmd->start_arg < 0) {
-		cmd->start_arg = 0;
-		err++;
-	}
-
 	if (cmd->start_src == TRIG_EXT && cmd->start_arg > 39) {
 		cmd->start_arg = 39;
 		err++;
 	}
 
-	if (cmd->scan_begin_src == TRIG_EXT && cmd->scan_begin_arg < 0) {
-		cmd->scan_begin_arg = 0;
-		err++;
-	}
-
 	if (cmd->scan_begin_src == TRIG_EXT && cmd->scan_begin_arg > 39) {
 		cmd->scan_begin_arg = 39;
 		err++;
 	}
 
-	if (cmd->convert_src == TRIG_EXT && cmd->convert_arg < 0) {
-		cmd->convert_arg = 0;
-		err++;
-	}
-
 	if (cmd->convert_src == TRIG_EXT && cmd->convert_arg > 39) {
 		cmd->convert_arg = 39;
 		err++;