Veteran filmmaker Chandra Barot, best known for directing the 1978 Amitabh Bachchan-starrer 'Don', passed away on Sunday due to cardiac arrest at a hospital in Mumbai, his family said. He was 86. Barot was battling 'Idiopathic Pulmonary Fibrosis' (IPF-fibrosis of lungs) for the last 11 years and had been receiving treatment at the Guru Nanak Hospital, as per his family.