6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Maxime Ripard mripard@kernel.org
[ Upstream commit 13c1d5f3a7fa7b55a26e73bb9e95342374a489b2 ]
A number of test suites call functions that expect the returned drm_display_mode to be destroyed eventually.
However, none of the tests called drm_mode_destroy, which results in a memory leak.
Since drm_mode_destroy takes two pointers as argument, we can't use a kunit wrapper. Let's just create a helper every test suite can use.
Reviewed-by: Thomas Zimmermann tzimmermann@suse.de Link: https://lore.kernel.org/r/20250408-drm-kunit-drm-display-mode-memleak-v1-1-9... Signed-off-by: Maxime Ripard mripard@kernel.org Stable-dep-of: 70f29ca3117a ("drm/tests: cmdline: Fix drm_display_mode memory leak") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/tests/drm_kunit_helpers.c | 22 ++++++++++++++++++++++ include/drm/drm_kunit_helpers.h | 3 +++ 2 files changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.c b/drivers/gpu/drm/tests/drm_kunit_helpers.c index 12d58353a54ef..04d98f81c5227 100644 --- a/drivers/gpu/drm/tests/drm_kunit_helpers.c +++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c @@ -391,6 +391,28 @@ static void kunit_action_drm_mode_destroy(void *ptr) drm_mode_destroy(NULL, mode); }
+/** + * drm_kunit_add_mode_destroy_action() - Add a drm_destroy_mode kunit action + * @test: The test context object + * @mode: The drm_display_mode to destroy eventually + * + * Registers a kunit action that will destroy the drm_display_mode at + * the end of the test. + * + * If an error occurs, the drm_display_mode will be destroyed. + * + * Returns: + * 0 on success, an error code otherwise. + */ +int drm_kunit_add_mode_destroy_action(struct kunit *test, + struct drm_display_mode *mode) +{ + return kunit_add_action_or_reset(test, + kunit_action_drm_mode_destroy, + mode); +} +EXPORT_SYMBOL_GPL(drm_kunit_add_mode_destroy_action); + /** * drm_kunit_display_mode_from_cea_vic() - return a mode for CEA VIC for a KUnit test * @test: The test context object diff --git a/include/drm/drm_kunit_helpers.h b/include/drm/drm_kunit_helpers.h index 3e5f4a23685ef..07e9a451262b6 100644 --- a/include/drm/drm_kunit_helpers.h +++ b/include/drm/drm_kunit_helpers.h @@ -120,6 +120,9 @@ drm_kunit_helper_create_crtc(struct kunit *test, const struct drm_crtc_funcs *funcs, const struct drm_crtc_helper_funcs *helper_funcs);
+int drm_kunit_add_mode_destroy_action(struct kunit *test, + struct drm_display_mode *mode); + struct drm_display_mode * drm_kunit_display_mode_from_cea_vic(struct kunit *test, struct drm_device *dev, u8 video_code);