There was no call on the hit, which the Lightning were livid about. They do have a point, in that the puck travelled under Perry's stick but at no point did he have possession. Aside from that, there was nothing wrong with this hit. Trouba's shoulder missed Perry's head completely, only making contact with his shoulder.
Perry did leave the game shortly after the hit, but was quick to return, so likely just needed some form of an equipment adjustment or perhaps just a quick look over by the team's medical staff.