[PATCH 02/10] selftests/damon/_damon_sysfs: check errors from nr_schemes file reads

SeongJae Park
2024-05-03T18:03:23Z

DAMON context staging method in _damon_sysfs.py is not checking the
returned error from nr_schemes file read. Check it.

Fixes: f5f0e5a2bef9 ("selftests/damon/_damon_sysfs: implement kdamonds start function")
Signed-off-by: SeongJae Park <sj@kernel.org>
---
tools/testing/selftests/damon/_damon_sysfs.py | 2 ++
1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index f80fdcef507c..fffa74a78bd7 100644
--- a/tools/testing/selftests/damon/_damon_sysfs.py
+++ b/tools/testing/selftests/damon/_damon_sysfs.py
@@ -341,6 +341,8 @@ class DamonCtx:
nr_schemes_file = os.path.join(
self.sysfs_dir(), 'schemes', 'nr_schemes')
content, err = read_file(nr_schemes_file)
+ if err is not None:
+ return err
if int(content) != len(self.schemes):
err = write_file(nr_schemes_file, '%d' % len(self.schemes))
if err != None:
--
2.39.2