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Commit 940c5b29 authored by Lin Ming's avatar Lin Ming Committed by Ingo Molnar
Browse files

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: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1298812411.2699.9.camel@localhost>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 888a8a3e

kernel/perf_event.c

+7 −2
Original line number Diff line number Diff line
@@ -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;