bpf: use the same condition in perf event set/free bpf handler

This is a cleanup such that doing the same check in
perf_event_free_bpf_prog as we already do in
perf_event_set_bpf_prog step.

Signed-off-by: Yonghong Song <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Acked-by: Martin KaFai Lau <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
(cherry picked from commit 0b4c684)

Orabug: 31667601
Signed-off-by: Alan Maguire <[email protected]>
Reviewed-by: Mark Haywood <[email protected]>
Signed-off-by: Somasundaram Krishnasamy <[email protected]>

Author: yonghong-song

kernel/events/core.c

@@ -8276,10 +8276,10 @@ static void perf_event_free_bpf_prog(struct perf_event *event)
 {
 	struct bpf_prog *prog;
 
-	perf_event_free_bpf_handler(event);
-
-	if (!event->tp_event)
+	if (event->attr.type != PERF_TYPE_TRACEPOINT) {
+		perf_event_free_bpf_handler(event);
 		return;
+	}
 
 	prog = event->tp_event->prog;
 	if (prog && event->tp_event->bpf_prog_owner == event) {