linux-kernel - [tip:perf/urgent] perf_event: Return -EINVAL for Offcore Response Events

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Date:	Fri, 1 Jul 2011 15:15:56 GMT
From:	tip-bot for Vince Weaver <vweaver1@...s.utk.edu>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, stable@...nel.org, tglx@...utronix.de,
	vweaver1@...s.utk.edu, mingo@...e.hu
Subject: [tip:perf/urgent] perf_event: Return -EINVAL for Offcore Response Events

Commit-ID:  04bffb83d17c1b93578564f18e02b6cb1c385b40
Gitweb:     http://git.kernel.org/tip/04bffb83d17c1b93578564f18e02b6cb1c385b40
Author:     Vince Weaver <vweaver1@...s.utk.edu>
AuthorDate: Fri, 10 Jun 2011 16:07:52 -0400
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 1 Jul 2011 10:27:09 +0200

perf_event: Return -EINVAL for Offcore Response Events

Return a proper error code when denying raw access to Offcore Response
events. Right now we return "0" which gives tools the false impression
that opening the event worked.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: <stable@...nel.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.00.1106101606000.14542@cl320.eecs.utk.edu
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/cpu/perf_event.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 3a0338b..c6bfa6b 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -598,7 +598,7 @@ static int x86_setup_perfctr(struct perf_event *event)
 	 * there's no sane user-space generalization yet:
 	 */
 	if (attr->type == PERF_TYPE_RAW)
-		return 0;
+		return -EINVAL;
 
 	if (attr->type == PERF_TYPE_HW_CACHE)
 		return set_ext_hw_attr(hwc, event);
--
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