drm/amdkfd: Fix scheduler race in kfd_wait_on_events sleep loop

			break;

		}

		/* Set task state to interruptible sleep before

		 * checking wake-up conditions. A concurrent wake-up

		 * will put the task back into runnable state. In that

		 * case schedule_timeout will not put the task to

		 * sleep and we'll get a chance to re-check the

		 * updated conditions almost immediately. Otherwise,

		 * this race condition would lead to a soft hang or a

		 * very long sleep.

		 */

		set_current_state(TASK_INTERRUPTIBLE);

		if (test_event_condition(all, num_events, event_waiters)) {

			if (copy_signaled_event_data(num_events,

					event_waiters, events))

			break;

		}

		timeout = schedule_timeout_interruptible(timeout);

		timeout = schedule_timeout(timeout);

	}

	__set_current_state(TASK_RUNNING);