Her own composition. Wrote it while still married with Kansas Joe McCoy.
Milton Brown [as Keep A Knockin' But You Can't Come In]
Bob Wills [who also cut a Keep A Knockin']
Muddy Waters [as Can't Get No Grindin'; "what's the matter with the meal"; crediting himself]
As for Little Richard's Keep A Knockin', see: You Can't Come In.