In the failure path, we call perf_detach_cgroup(), but we didn't
call perf_get_cgroup() prio to it.
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
Acked-by: NStephane Eranian <eranian@google.com>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <4D6F346E.9070606@cn.fujitsu.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>