> Jobs can be in-flight when the file descriptor is closed (either because > the process did not terminate properly, or because it didn't wait for > all GPU jobs to be finished), and apparently panfrost_job_close() does > not cancel already running jobs. Let's refcount the MMU context object > so it's lifetime is no longer bound to the FD lifetime and running jobs > can finish properly without generating spurious page faults. Remind me - why can't we hard stop in-flight jobs when the fd is closed? I've seen cases where kill -9'ing a badly behaved process doesn't end the fault storm, or unfreeze the desktop.
