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| author | Stephane Eranian <eranian@google.com> | 2009-11-24 05:27:18 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-24 19:23:48 +0100 |
| commit | 1261a02a0c0ab8e643125705f0d1d83e5090e4d1 (patch) | |
| tree | f88fb71a8ef8c80c4d9be6bbee9869dd895fb330 /arch | |
| parent | fcf1203a919c3a3d212c0ed01f5240fd592bf5ae (diff) | |
| download | op-kernel-dev-1261a02a0c0ab8e643125705f0d1d83e5090e4d1.zip op-kernel-dev-1261a02a0c0ab8e643125705f0d1d83e5090e4d1.tar.gz | |
perf_events, x86: Fix validate_event bug
The validate_event() was failing on valid event combinations. The
function was assuming that if x86_schedule_event() returned 0, it
meant error. But x86_schedule_event() returns the counter index and
0 is a perfectly valid value. An error is returned if the function
returns a negative value.
Furthermore, validate_event() was also failing for event groups
because the event->pmu was not set until after
hw_perf_event_init().
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: paulus@samba.org
Cc: perfmon2-devel@lists.sourceforge.net
Cc: eranian@gmail.com
LKML-Reference: <4b0bdf36.1818d00a.07cc.25ae@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
--
arch/x86/kernel/cpu/perf_event.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index bd87430..c1bbed1 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -2229,10 +2229,10 @@ validate_event(struct cpu_hw_events *cpuc, struct perf_event *event) { struct hw_perf_event fake_event = event->hw; - if (event->pmu != &pmu) + if (event->pmu && event->pmu != &pmu) return 0; - return x86_schedule_event(cpuc, &fake_event); + return x86_schedule_event(cpuc, &fake_event) >= 0; } static int validate_group(struct perf_event *event) |
