Rich Homie Quan Father Gunned Down Hospitalized in Atlanta

Rich Homie Quan's father got shot multiple times this morning, and the rapper is by his side in an Atlanta hospital right now 

Quan's dad, Corey Lamar, was in the barber shop he owns this morning when a man ... or men ... came in and attempted to rob the place -- and during the hold up they opened fire ... according to Quan's rep.

We're told Lamar -- who is Quan's manager -- was hit 4 times. He was rushed to a hospital and taken into surgery. We're told he is in critical condition, but expected to survive.

RHQ is at the hospital ... waiting for his father to get out of surgery.

Story developing ...