Who was the Governor General of India when Gandhiji initiated Civil Disobedience Movement?

Mahatma Gandhi launched the historic Civil Disobedience Movement via the Dandi Salt March beginning on March $12$, $1930$. During this phase, Lord Irwin served as the Viceroy and Governor-General of India ($1926-1931$), leading up to the subsequent signing of the Gandhi-Irwin Pact in March $1931$.