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drm: Skip drm_mode_config_validate() for !modeset

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drm_mode_config_init() may not have been called when the driver/device
doesn't support modeset. That will cause drm_mode_config_validate()
to oops. Skip the validation for !modeset.

TODO: We may want to consider calling drm_mode_config_init()
unconditionally to avoid similar issues elsewhere...

Fixes: 74d2aacbe8 ("drm: Validate encoder->possible_clones")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200318182518.31618-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Ville Syrjälä 2020-03-18 20:25:18 +02:00
parent 8edb699707
commit b684822a44
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_mode_config.c
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@ -608,6 +608,9 @@ void drm_mode_config_validate(struct drm_device *dev)
{
struct drm_encoder *encoder;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return;
drm_for_each_encoder(encoder, dev)
fixup_encoder_possible_clones(encoder);