Commit-ID: 6e801e016917989ab8a7ddfc4229a15a5621622a
Gitweb: http://git.kernel.org/tip/6e801e016917989ab8a7ddfc4229a15a5621622a
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Tue, 26 Jan 2016 12:17:08 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 29 Jan 2016 08:35:30 +0100
perf: Fix STATE_EXIT usage
We should never attempt to enable a STATE_EXIT event.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vince Weaver <vincent.weaver@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/events/core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d345964..d84374f 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2253,7 +2253,8 @@ static void __perf_event_enable(struct perf_event *event,
struct perf_event *leader = event->group_leader;
struct perf_event_context *task_ctx;
- if (event->state >= PERF_EVENT_STATE_INACTIVE)
+ if (event->state >= PERF_EVENT_STATE_INACTIVE ||
+ event->state <= PERF_EVENT_STATE_ERROR)
return;
update_context_time(ctx);
@@ -2298,7 +2299,8 @@ static void _perf_event_enable(struct perf_event *event)
struct perf_event_context *ctx = event->ctx;
raw_spin_lock_irq(&ctx->lock);
- if (event->state >= PERF_EVENT_STATE_INACTIVE) {
+ if (event->state >= PERF_EVENT_STATE_INACTIVE ||
+ event->state < PERF_EVENT_STATE_ERROR) {
raw_spin_unlock_irq(&ctx->lock);
return;
}
--
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