From 4508b65ca8f435daee83458fda01e36479767631 Mon Sep 17 00:00:00 2001
From: SeongJae Park <sj@kernel.org>
Date: Mon, 28 Oct 2024 16:30:56 -0700
Subject: [PATCH] selftests/damon/debugfs_duplicate_context_creation: hide
 errors from expected file write failures

debugfs_duplicate_context_creation.sh does an invalid file write to ensure
it fails.  Check of the failure is sufficient, so the error message from
the failure only makes the output unnecessarily noisy.  Hide it.

Link: https://lkml.kernel.org/r/20241028233058.283381-5-sj@kernel.org
Fixes: ade38b8ca5ce ("selftest/damon: add a test for duplicate context dirs creation")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Andrew Paniakin <apanyaki@amazon.com>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 .../selftests/damon/debugfs_duplicate_context_creation.sh       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/damon/debugfs_duplicate_context_creation.sh b/tools/testing/selftests/damon/debugfs_duplicate_context_creation.sh
index 4a76e37ef16b1..bd6c22d96ead3 100755
--- a/tools/testing/selftests/damon/debugfs_duplicate_context_creation.sh
+++ b/tools/testing/selftests/damon/debugfs_duplicate_context_creation.sh
@@ -12,7 +12,7 @@ then
 	exit 1
 fi
 
-if echo foo > "$DBGFS/mk_contexts"
+if echo foo > "$DBGFS/mk_contexts" 2> /dev/null
 then
 	echo "duplicate context creation success"
 	exit 1
-- 
2.50.1