diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/field_type/DateTimeItem.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/field_type/DateTimeItem.php
index 0c51dd4..b0324a7 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/field_type/DateTimeItem.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/field_type/DateTimeItem.php
@@ -76,7 +76,7 @@ public static function schema(FieldInterface $field) {
   /**
    * {@inheritdoc}
    */
-  public function settingsForm(array $form, array &$form_state) {
+  public function settingsForm(array $form, array &$form_state, $has_data) {
     $element = array();
 
     $element['datetime_type'] = array(
diff --git a/core/modules/number/lib/Drupal/number/Plugin/field/field_type/DecimalItem.php b/core/modules/number/lib/Drupal/number/Plugin/field/field_type/DecimalItem.php
index d7ca60f..9271899 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/field/field_type/DecimalItem.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/field/field_type/DecimalItem.php
@@ -67,10 +67,9 @@ public static function schema(FieldInterface $field) {
   /**
    * {@inheritdoc}
    */
-  public function settingsForm(array $form, array &$form_state) {
+  public function settingsForm(array $form, array &$form_state, $has_data) {
     $element = array();
     $settings = $this->getFieldSettings();
-    $has_data = $this->getInstance()->getField()->hasData();
 
     $element['precision'] = array(
       '#type' => 'select',
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php
index d048caf..644a2a9 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php
@@ -83,7 +83,7 @@ public function getConstraints() {
   /**
    * {@inheritdoc}
    */
-  public function settingsForm(array $form, array &$form_state) {
+  public function settingsForm(array $form, array &$form_state, $has_data) {
     $element = array();
 
     $element['max_length'] = array(
@@ -93,9 +93,7 @@ public function settingsForm(array $form, array &$form_state) {
       '#required' => TRUE,
       '#description' => t('The maximum length of the field in characters.'),
       '#min' => 1,
-      // @todo: If $has_data, add a validate handler that only allows
-      // max_length to increase.
-      '#disabled' => $this->getInstance()->getField()->hasData(),
+      '#disabled' => $has_data,
     );
 
     return $element;