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drm/tests: hdmi: handle empty modes in find_preferred_mode()

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If the connector->modes list is empty, then list_first_entry() returns a
bogus entry. Change that to use list_first_entry_or_null().

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241130-hdmi-mode-valid-v5-1-742644ec3b1f@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Dmitry Baryshkov
2024-11-30 03:52:26 +02:00
parent cb2e1c2136
commit d3314efd6e
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
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@@ -46,7 +46,7 @@ static struct drm_display_mode *find_preferred_mode(struct drm_connector *connec
struct drm_display_mode *mode, *preferred;
mutex_lock(&drm->mode_config.mutex);
preferred = list_first_entry(&connector->modes, struct drm_display_mode, head);
preferred = list_first_entry_or_null(&connector->modes, struct drm_display_mode, head);
list_for_each_entry(mode, &connector->modes, head)
if (mode->type & DRM_MODE_TYPE_PREFERRED)
preferred = mode;