linux-kernel - [PATCH 2/7] drm/tests: modeset: Fix drm_display

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Message-Id: <20250408-drm-kunit-drm-display-mode-memleak-v1-2-996305a2e75a@kernel.org>
Date: Tue, 08 Apr 2025 09:34:08 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>
Cc: Philipp Stanner <phasta@...lbox.org>, dri-devel@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, Maxime Ripard <mripard@...nel.org>
Subject: [PATCH 2/7] drm/tests: modeset: Fix drm_display_mode memory leak

drm_mode_find_dmt() returns a drm_display_mode that needs to be
destroyed later one. The drm_test_pick_cmdline_res_1920_1080_60() test
never does however, which leads to a memory leak.

Let's make sure it's freed.

Closes: https://lore.kernel.org/dri-devel/a7655158a6367ac46194d57f4b7433ef0772a73e.camel@mailbox.org/
Fixes: 8fc0380f6ba7 ("drm/client: Add some tests for drm_connector_pick_cmdline_mode()")
Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
 drivers/gpu/drm/tests/drm_client_modeset_test.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_client_modeset_test.c b/drivers/gpu/drm/tests/drm_client_modeset_test.c
index 7516f6cb36e4e3a1ed3a655de6f6a4479a0efade..3e9518d7b8b7eb92f1be3ce376d850cbab638d10 100644
--- a/drivers/gpu/drm/tests/drm_client_modeset_test.c
+++ b/drivers/gpu/drm/tests/drm_client_modeset_test.c
@@ -93,10 +93,13 @@ static void drm_test_pick_cmdline_res_1920_1080_60(struct kunit *test)
 	int ret;
 
 	expected_mode = drm_mode_find_dmt(priv->drm, 1920, 1080, 60, false);
 	KUNIT_ASSERT_NOT_NULL(test, expected_mode);
 
+	ret = drm_kunit_add_mode_destroy_action(test, expected_mode);
+	KUNIT_ASSERT_EQ(test, ret, 0);
+
 	KUNIT_ASSERT_TRUE(test,
 			  drm_mode_parse_command_line_for_connector(cmdline,
 								    connector,
 								    cmdline_mode));
 

-- 
2.49.0