In C, how can I reverse only a portion of a doubly linked list from index a to index b?

The following is how I reversed I doubly linked list, if you would like to use the same variable names, but now how do I reverse just a portion of a doubly linked list?

Node *nextNode;

curr = head;

while (curr != NULL)

{

nextNode = curr->next;

curr->next = curr->prev;

curr->prev = nextNode;

curr = nextNode;

}

curr = head;

head = tail;

tail = curr;