From: SeongJae Park <sj@kernel.org>
Date: Mon, 28 Oct 2024 23:30:55 +0000 (-0700)
Subject: selftests/damon/_debugfs_common: hide expected error message from test_write_result()
X-Git-Tag: v6.13-rc1~99^2~60
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82475d111de73b5688389d2736509bf30cb338d8;p=thirdparty%2Fkernel%2Flinux.git

selftests/damon/_debugfs_common: hide expected error message from test_write_result()

DAMON debugfs interface selftests use test_write_result() to check if
valid or invalid writes to files of the interface success or fail as
expected.  File write error messages from expected failures are only
making the output noisy.  Hide such expected error messages.

Link: https://lkml.kernel.org/r/20241028233058.283381-4-sj@kernel.org
Fixes: b348eb7abd09 ("mm/damon: add user space selftests")
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>
---

diff --git a/tools/testing/selftests/damon/_debugfs_common.sh b/tools/testing/selftests/damon/_debugfs_common.sh
index aa995516870bc..54d45791b0d9c 100644
--- a/tools/testing/selftests/damon/_debugfs_common.sh
+++ b/tools/testing/selftests/damon/_debugfs_common.sh
@@ -8,7 +8,12 @@ test_write_result() {
 	expect_reason=$4
 	expected=$5
 
-	echo "$content" > "$file"
+	if [ "$expected" = "0" ]
+	then
+		echo "$content" > "$file"
+	else
+		echo "$content" > "$file" 2> /dev/null
+	fi
 	if [ $? -ne "$expected" ]
 	then
 		echo "writing $content to $file doesn't return $expected"