Sorting linked list from greatest value to smallest - C

I have to sort a linked list from greatest value to the smallest. But the way I'm doing is not working. Can somebody please help me?

This is the structures I have:

typedef struct{ 
    int identificador; 
    char nome[50]; 
    float comissao; 
    float salario; 
}Vendedor;

typedef struct celulav{
    Vendedor vendedor;
    struct celulav *prox;
}CelulaV;

typedef struct{
    CelulaV *primeiro;
    CelulaV *ultimo;
}ListaV;

I want to order "ListaV" by the atribute "comissao" in "Vendedor". From the greatest value to the smallest one.

This is what I did:

void Ordena(ListaV lista, ListaV *lista_nova){ 
    CelulaV *aux; 
    CelulaV *aux2; 
    Vendedor v;  
    aux = lista.primeiro; 
    aux2 = lista_nova->primeiro; 
        while(aux->prox != NULL){ 
            v.comissao = aux->vendedor.comissao; 
                if(aux->prox->vendedor.comissao < v.comissao){ 
                    v.comissao = aux->prox->vendedor.comissao; 
                    aux = aux->prox; 
                }else{ 
                    aux = aux->prox; 
                }
        aux2->vendedor = v; 
        aux2 = aux2->prox;
        }
}

But this is not working. I can't identify the error.