I don't know the song and can only comment that although not very inventive, it can't be plagiarism to copy a chord progression. Look at "How High the Moon" and "Anthropology". Same chords. Charlie Parker "ripped them off". Look at the number of songs that use a Rhythm Progression: eg Ornithology (Parker again), Straighten Up & Fly Right, That Cat Is High and on and on.I can only imagine that Santana - who must know that progression -was doing something inventive with it??
--Callie