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perf: Fix the missing event initialization when pmu is found in idr

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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>
This commit is contained in:
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;