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perf python: Reference Py_None before returning it

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Python None objects are handled just like all the other objects with
respect to their reference counting. Before returning Py_None, its
reference count thus needs to be bumped.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Machata <petrm@mellanox.com>
Link: http://lkml.kernel.org/r/b1e565ecccf68064d8d54f37db5d028dda8fa522.1521675563.git.petrm@mellanox.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Petr Machata 2018-03-22 00:57:32 +01:00 committed by Arnaldo Carvalho de Melo
parent 751b1783da
commit 83428f2fad
1 changed files with 3 additions and 1 deletions
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4
tools/perf/util/python.c
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@ -1004,8 +1004,10 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
return PyErr_NoMemory();
evsel = perf_evlist__event2evsel(evlist, event);
if (!evsel)
if (!evsel) {
Py_INCREF(Py_None);
return Py_None;
}
pevent->evsel = evsel;