[PATCH v2 2/9] perf evsel: Avoid close(-1)

[Andi Kleen]

From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

In some weak fallback cases close can be called a lot with -1. Check
for this case and avoid calling close then.

This is mainly to shut up valgrind which complains about this case.

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
 tools/perf/lib/evsel.c  | 3 ++-
 tools/perf/util/evsel.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/lib/evsel.c b/tools/perf/lib/evsel.c
index a8cb582e2721..5a89857b0381 100644
--- a/tools/perf/lib/evsel.c
+++ b/tools/perf/lib/evsel.c
@@ -120,7 +120,8 @@ void perf_evsel__close_fd(struct perf_evsel *evsel)
 
 	for (cpu = 0; cpu < xyarray__max_x(evsel->fd); cpu++)
 		for (thread = 0; thread < xyarray__max_y(evsel->fd); ++thread) {
-			close(FD(evsel, cpu, thread));
+			if (FD(evsel, cpu, thread) >= 0)
+				close(FD(evsel, cpu, thread));
 			FD(evsel, cpu, thread) = -1;
 		}
 }
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index d831038b55f2..d4451846af93 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1815,7 +1815,8 @@ int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
 	old_errno = errno;
 	do {
 		while (--thread >= 0) {
-			close(FD(evsel, cpu, thread));
+			if (FD(evsel, cpu, thread) >= 0)
+				close(FD(evsel, cpu, thread));
 			FD(evsel, cpu, thread) = -1;
 		}
 		thread = nthreads;
-- 
2.21.0