Quicksort With Single Linked List / 1 Node Parameter

I have a custom linkedList(single) class that uses the provided node class. Now I have another class to QuickSort this.(left out for brevity, i just wanna focus on editing the L.head). However, instead of passing the quicksort method the entire linkedList, I want to pass it just the head from the linkedlist.

My problem is accessing this head node and changing it from the quckSort method/class, and I dont want to delete it or simply just change the element value

Main:

public class TestLinkedList {
public static <E extends Comparable<E>> void main(String[] args) {
MyLinkedList<Integer> L = new MyLinkedList<Integer>();
L.add(3);
L.add(1);
L.add(2);
System.out.println("Initial=" + L);
MySort.quickSort(L.head);
System.out.println("After ="+L);
}
}

QuickSort:

public class MySort {
public static <E extends Comparable<E>> void quickSort(MyNode<E> list) {
list = list.next;
}

Node Class:

public class MyNode<E extends Comparable<E>> {
E element;
MyNode<E> next;
public MyNode(E item) {
element = item;
next = null;

[code]....