webui: fix logic for when to re-create the partitioning

ui/webui/src/components/storage/MountPointMapping.jsx

@@ -453,13 +453,31 @@ const MountPointMappingContent = ({ deviceData, partitioningData, dispatch, idPr
     }
 };
 
+const getDeviceChildren = ({ deviceData, device }) => {
+    const children = [];
+    const deviceChildren = deviceData[device]?.children?.v || [];
+
+    if (deviceChildren.length === 0) {
+        children.push(device);
+    } else {
+        deviceChildren.forEach(child => {
+            children.push(...getDeviceChildren({ deviceData, device: child }));
+        });
+    }
+
+    return children;
+};
+
 export const MountPointMapping = ({ deviceData, diskSelection, partitioningData, dispatch, idPrefix, setIsFormValid, onAddErrorNotification, stepNotification }) => {
     const [creatingPartitioning, setCreatingPartitioning] = useState(true);
 
     // If device selection changed since the last partitioning request redo the partitioning
     const selectedDevices = diskSelection.selectedDisks;
     const partitioningDevices = partitioningData?.requests?.map(r => r["device-spec"]) || [];
-    const canReusePartitioning = selectedDevices.length === partitioningDevices.length && selectedDevices.every(d => partitioningDevices.includes(d));
+    const selectedDeviceChildren = selectedDevices
+            .map(device => getDeviceChildren({ deviceData, device }))
+            .flat(1);
+    const canReusePartitioning = selectedDeviceChildren.length === partitioningDevices.length && selectedDeviceChildren.every(d => partitioningDevices.includes(d));
 
     useEffect(() => {
         if (canReusePartitioning) {