From 984763cb90d4b5444baa0c3e43feff7926bf1834 Mon Sep 17 00:00:00 2001
From: Robert Richter <robert.richter@amd.com>
Date: Tue, 16 Mar 2010 17:07:33 +0100
Subject: [PATCH] perf, x86: Report error code that returned from
x86_pmu.hw_config()
If x86_pmu.hw_config() fails a fixed error code (-EOPNOTSUPP) is
returned even if a different error was reported. This patch fixes
this.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Lin Ming <ming.m.lin@intel.com>
Cc: acme@redhat.com
Cc: eranian@google.com
Cc: gorcunov@openvz.org
Cc: peterz@infradead.org
Cc: fweisbec@gmail.com
LKML-Reference: <20100316160733.GR1585@erda.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/cpu/perf_event.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 0d3466cf7f578..5dacf63f913e7 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -472,8 +472,9 @@ static int __hw_perf_event_init(struct perf_event *event)
hwc->last_tag = ~0ULL;
/* Processor specifics */
- if (x86_pmu.hw_config(attr, hwc))
- return -EOPNOTSUPP;
+ err = x86_pmu.hw_config(attr, hwc);
+ if (err)
+ return err;
if (!hwc->sample_period) {
hwc->sample_period = x86_pmu.max_period;
--
2.30.2