staging: comedi: das1800: use cfc_check_trigger_arg_*() helpers

Use the new helpers in the step 3 tests of das1800_ai_do_cmdtest().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/das1800.c

@@ -824,39 +824,23 @@ static int das1800_ai_do_cmdtest(struct comedi_device *dev,
 	if (err)
 		return 2;
 
-	/* step 3: make sure arguments are trivially compatible */
+	/* Step 3: check if arguments are trivially valid */
 
-	if (cmd->start_arg != 0) {
-		cmd->start_arg = 0;
-		err++;
-	}
-	if (cmd->convert_src == TRIG_TIMER) {
-		if (cmd->convert_arg < thisboard->ai_speed) {
-			cmd->convert_arg = thisboard->ai_speed;
-			err++;
-		}
-	}
-	if (!cmd->chanlist_len) {
-		cmd->chanlist_len = 1;
-		err++;
-	}
-	if (cmd->scan_end_arg != cmd->chanlist_len) {
-		cmd->scan_end_arg = cmd->chanlist_len;
-		err++;
-	}
+	err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
+
+	if (cmd->convert_src == TRIG_TIMER)
+		err |= cfc_check_trigger_arg_min(&cmd->convert_arg,
+						 thisboard->ai_speed);
+
+	err |= cfc_check_trigger_arg_min(&cmd->chanlist_len, 1);
+	err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
 
 	switch (cmd->stop_src) {
 	case TRIG_COUNT:
-		if (!cmd->stop_arg) {
-			cmd->stop_arg = 1;
-			err++;
-		}
+		err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1);
 		break;
 	case TRIG_NONE:
-		if (cmd->stop_arg != 0) {
-			cmd->stop_arg = 0;
-			err++;
-		}
+		err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
 		break;
 	default:
 		break;