drm/tests: modes: Fix drm_display_mode memory leak

drm_analog_tv_mode() and its variants return a drm_display_mode that
needs to be destroyed later one. The
drm_test_modes_analog_tv_mono_576i() test never does however, which
leads to a memory leak.

Let's make sure it's freed.

Reported-by: Philipp Stanner <phasta@mailbox.org>
Closes: https://lore.kernel.org/dri-devel/a7655158a6367ac46194d57f4b7433ef0772a73e.camel@mailbox.org/
Fixes: e31538489908 ("drm/tests: Add tests for the new Monochrome value of tv_mode")
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250408-drm-kunit-drm-display-mode-memleak-v1-6-996305a2e75a@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>

diff --git a/drivers/gpu/drm/tests/drm_modes_test.c b/drivers/gpu/drm/tests/drm_modes_test.c
index 7ba646d..f5b20f9 100644 (file)
--- a/drivers/gpu/drm/tests/drm_modes_test.c
+++ b/drivers/gpu/drm/tests/drm_modes_test.c
@@ -156,6 +156,7 @@ static void drm_test_modes_analog_tv_mono_576i(struct kunit *test)
 {
        struct drm_test_modes_priv *priv = test->priv;
        struct drm_display_mode *mode;
+       int ret;
 
        mode = drm_analog_tv_mode(priv->drm,
                                  DRM_MODE_TV_MODE_MONOCHROME,
@@ -163,6 +164,9 @@ static void drm_test_modes_analog_tv_mono_576i(struct kunit *test)
                                  true);
        KUNIT_ASSERT_NOT_NULL(test, mode);
 
+       ret = drm_kunit_add_mode_destroy_action(test, mode);
+       KUNIT_ASSERT_EQ(test, ret, 0);
+
        KUNIT_EXPECT_EQ(test, drm_mode_vrefresh(mode), 50);
        KUNIT_EXPECT_EQ(test, mode->hdisplay, 720);