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: