In the interview on The Graham Norton Show, co-star Simon Pegg even notes that the crew said “that’s so him” regarding Tom Cruise finishing the shot while injured.
Tom Cruise also explains that the stunt was always supposed to have him jumping from one building and landing on the ledge of another and then pulling himself up.
The only real thing that went wrong was his ankle breaking on the landing.
Clearly there was precedent for this level of toughness and commitment if the crew had such a blasé reaction to the actor completing the take.