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perf, x86: Fix silly bug in data store buffer allocation 

Fix up the ds allocation error path, where we could free @buffer before
we used it.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: paulus@samba.org
Cc: eranian@google.com
Cc: robert.richter@amd.com
Cc: fweisbec@gmail.com
LKML-Reference: <20100305154128.813452402@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-03-05 12:09:29 +01:00 committed by Ingo Molnar
parent 30a813ae03
commit 3adaebd695
1 changed files with 1 additions and 3 deletions
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4
arch/x86/kernel/cpu/perf_event_intel_ds.c
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@ -127,10 +127,8 @@ static int reserve_ds_buffers(void)
err = -ENOMEM;
ds = kzalloc(sizeof(*ds), GFP_KERNEL);
if (unlikely(!ds)) {
kfree(buffer);
if (unlikely(!ds))
break;
}
per_cpu(cpu_hw_events, cpu).ds = ds;
if (x86_pmu.bts) {