forked from luck/tmp_suning_uos_patched
drm: Reject page_flip for !DRIVER_MODESET
Somehow this one slipped through, which means drivers without modeset support can be oopsed (since those also don't call drm_mode_config_init, which means the crtc lookup will chase an uninitalized idr). Reported-by: Alexander Potapenko <glider@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -5404,6 +5404,9 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
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struct drm_pending_vblank_event *e = NULL;
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int ret = -EINVAL;
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if (!drm_core_check_feature(dev, DRIVER_MODESET))
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return -EINVAL;
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if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
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page_flip->reserved != 0)
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return -EINVAL;
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