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We only need it for the GBM surface the FB was originally created against; a mismatch here is very bad indeed, so no reason to pass it in explictly every time rather than store it. Following patches change drm_fb to be explicitly reference counted; in order to reduce churn, rename drm_output_release_fb to drm_fb_unref whilst changing its call signature here, even though it does not yet actually perform reference counting. Signed-off-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Armin Krezović <krezovic.armin@gmail.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
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