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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>
hifive-unleashed-5.1
Lin Ming 2011-02-27 21:13:31 +08:00 committed by Ingo Molnar
parent 888a8a3e9d
commit 940c5b2971
1 changed files with 7 additions and 2 deletions
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9
kernel/perf_event.c
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@ -6098,17 +6098,22 @@ struct pmu *perf_init_event(struct perf_event *event)
{
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;