Freddie King. Deep, deep soul blues! I believe this song was written by Bill Withers.
Freddie is too often overlooked, commercially; but he had 'it'. His feel was amazing. I'll pick up my jaw, now!
He also wrote 'Hideaway'-- which a young Eric Clapton covered and recorded, in 1966, with The Bluesbreakers. King passed away, in 1976. You are missed!
(Some raw facts came from Wikipedia, but I write my own stuff!)