linux-kernel - [PATCH 3/5] MIPS/Perf-events: Check event state in validate

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Date:	Thu, 18 Nov 2010 14:56:39 +0800
From:	Deng-Cheng Zhu <dengcheng.zhu@...il.com>
To:	ralf@...ux-mips.org, a.p.zijlstra@...llo.nl, fweisbec@...il.com,
	will.deacon@....com
Cc:	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	wuzhangjin@...il.com, paulus@...ba.org, mingo@...e.hu,
	acme@...hat.com, dengcheng.zhu@...il.com
Subject: [PATCH 3/5] MIPS/Perf-events: Check event state in validate_event()

Ignore events that are not for this PMU or are in off/error state.

Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@...il.com>
---
 arch/mips/kernel/perf_event.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/mips/kernel/perf_event.c b/arch/mips/kernel/perf_event.c
index 1ee44a3..9c6442a 100644
--- a/arch/mips/kernel/perf_event.c
+++ b/arch/mips/kernel/perf_event.c
@@ -486,7 +486,7 @@ static int validate_event(struct cpu_hw_events *cpuc,
 {
 	struct hw_perf_event fake_hwc = event->hw;
 
-	if (event->pmu && event->pmu != &pmu)
+	if (event->pmu != &pmu || event->state <= PERF_EVENT_STATE_OFF)
 		return 0;
 
 	return mipspmu->alloc_counter(cpuc, &fake_hwc) >= 0;
-- 
1.7.1

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