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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-11-30 03:52:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 10:04:45 +0100 |
| commit | e0d048dabe33728ff228ac594e0e634ac5a95695 (patch) | |
| tree | b1edf05d3495547a351068f85416adbca2b777c0 /drivers/gpu | |
| parent | 56e6c7f6d2a6b4e0aae0528c502e56825bb40598 (diff) | |
| download | linux-e0d048dabe33728ff228ac594e0e634ac5a95695.tar.gz linux-e0d048dabe33728ff228ac594e0e634ac5a95695.tar.bz2 linux-e0d048dabe33728ff228ac594e0e634ac5a95695.zip | |
drm/tests: hdmi: handle empty modes in find_preferred_mode()
[ Upstream commit d3314efd6ebf335a3682b1d6b1b81cdab3d8254a ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c index 294773342e71..1e77689af654 100644 --- a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c +++ b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c @@ -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; |