staging: comedi: dt2814: use cfc_check_trigger_arg_*() helpers

Use the new helpers in the step 3 tests of dt2814_ai_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/dt2814.c

@@ -149,36 +149,20 @@ static int dt2814_ai_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->scan_begin_arg > 1000000000) {
-		cmd->scan_begin_arg = 1000000000;
-		err++;
-	}
-	if (cmd->scan_begin_arg < DT2814_MAX_SPEED) {
-		cmd->scan_begin_arg = DT2814_MAX_SPEED;
-		err++;
-	}
-	if (cmd->scan_end_arg != cmd->chanlist_len) {
-		cmd->scan_end_arg = cmd->chanlist_len;
-		err++;
-	}
-	if (cmd->stop_src == TRIG_COUNT) {
-		if (cmd->stop_arg < 2) {
-			cmd->stop_arg = 2;
-			err++;
-		}
-	} else {
-		/* TRIG_NONE */
-		if (cmd->stop_arg != 0) {
-			cmd->stop_arg = 0;
-			err++;
-		}
-	}
+	err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
+
+	err |= cfc_check_trigger_arg_max(&cmd->scan_begin_arg, 1000000000);
+	err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
+					 DT2814_MAX_SPEED);
+
+	err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
+
+	if (cmd->stop_src == TRIG_COUNT)
+		err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 2);
+	else	/* TRIG_NONE */
+		err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
 
 	if (err)
 		return 3;