What was Gandhi Irwin Pact?

This pact was signed between Mahatma Gandhi and the then Viceroy of India, Lord Irwin on 5 March 1931. Salient features of this act were as following:
1. The Congress would participate in the Round Table Conference.
2. The Congress would discontinue the Civil Disobedience Movement.
3. The Government would withdraw all ordinances issued to curb the Congress.
4. The Government would withdraw all prosecutions relating to offenses other than violent one.The Government would release all persons undergoing sentences of imprisonment for their activities in the civil disobedience movement.