Strictly speaking, Volcker caused two recessions (the first of which likely ended Carter's re-election prospects).

Although raising interest rates tamped down inflation on the demand side, we don't give enough credit to Carter for attacking the supply side by deregulating energy markets.

Carter typically doesn't get credit because prices didn't really ease until he was out of office. However, it looks like energy prices wouldn't have decreased if Carter hadn't deregulated the oil and gas industry, which allowed domestic producers to become competitive. (Ironically, Carter thought deregulation would raise prices and foster a move to alternative energy. Instead we got shale oil and fracking. Unintended consequences.)