[PATCH v4 33/48] libperf: Allow NULL in perf_cpu_map__idx

[Ian Rogers <irogers@google.com>]

Return -1, not found, if NULL is passed.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/lib/perf/cpumap.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c
index 3c36a06771af..eacea3ab965a 100644
--- a/tools/lib/perf/cpumap.c
+++ b/tools/lib/perf/cpumap.c
@@ -270,8 +270,13 @@ bool perf_cpu_map__empty(const struct perf_cpu_map *map)
 
 int perf_cpu_map__idx(const struct perf_cpu_map *cpus, int cpu)
 {
-	int low = 0, high = cpus->nr;
+	int low, high;
 
+	if (!cpus)
+		return -1;
+
+	low = 0;
+	high = cpus->nr;
 	while (low < high) {
 		int idx = (low + high) / 2,
 		    cpu_at_idx = cpus->map[idx];
-- 
2.34.1.448.ga2b2bfdf31-goog