perf: Fix the missing event initialization when pmu is found in idr
Currently, the event is not initialized if pmu is found in idr. This
never causes bug just because now no pmu is associated with the idr
id.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1298812411.2699.9.camel@localhost>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 64a018e..821ce82 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -6098,17 +6098,22 @@
{
struct pmu *pmu = NULL;
int idx;
+ int ret;
idx = srcu_read_lock(&pmus_srcu);
rcu_read_lock();
pmu = idr_find(&pmu_idr, event->attr.type);
rcu_read_unlock();
- if (pmu)
+ if (pmu) {
+ ret = pmu->event_init(event);
+ if (ret)
+ pmu = ERR_PTR(ret);
goto unlock;
+ }
list_for_each_entry_rcu(pmu, &pmus, entry) {
- int ret = pmu->event_init(event);
+ ret = pmu->event_init(event);
if (!ret)
goto unlock;