perf: Limit event refresh to sampling event

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1290525705-6265-2-git-send-email-fbuihuu@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 880698488c9105219a006d7685a98ef2e212d245..027c4d33b4d3f0f6ec66755374830e940e8d9ea3 100644 (file)
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1073,7 +1073,7 @@ static int perf_event_refresh(struct perf_event *event, int refresh)
        /*
         * not supported on inherited events
         */
-       if (event->attr.inherit)
+       if (event->attr.inherit || !is_sampling_event(event))
                return -EINVAL;
 
        atomic_add(refresh, &event->event_limit);