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drm/tests: managed: Add comments about test intent

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Add comments explaining the intention behind the test and certain
implementation details related to device lifetime.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240115171351.504264-4-michal.winiarski@intel.com
This commit is contained in:
Michał Winiarski
2024-01-15 18:13:49 +01:00
committed by Maxime Ripard
parent dd0ce02f98
commit a1c73a3b79
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/tests/drm_managed_test.c
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@@ -24,6 +24,10 @@ static void drm_action(struct drm_device *drm, void *ptr)
wake_up_interruptible(&priv->action_wq);
}
/*
* The test verifies that the release action is called automatically when the
* device is released.
*/
static void drm_test_managed_run_action(struct kunit *test)
{
struct managed_test_priv *priv;
@@ -38,6 +42,11 @@ static void drm_test_managed_run_action(struct kunit *test)
dev = drm_kunit_helper_alloc_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
/*
* DRM device can't be embedded in priv, since priv->action_done needs
* to remain allocated beyond both parent device and drm_device
* lifetime.
*/
drm = __drm_kunit_helper_alloc_drm_device(test, dev, sizeof(*drm), 0, DRIVER_MODESET);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, drm);