On Tue, Aug 11, 2015 at 09:23:49PM +0900, Inki Dae wrote:
> This patch fixes null pointer access incurred when
> encoder driver didn't set its own mode_fixup callback.
>
> mode_fixup callback shoudn't be called if the callback
> of drm_encoder_helper_funcs is NULL.
>
> Changelog v2:
> - change it to else if
>
> Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Applied to drm-misc, thanks.
-Daniel
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 5b59d5ad..c25bacb 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -298,7 +298,7 @@ mode_fixup(struct drm_atomic_state *state)
> encoder->base.id, encoder->name);
> return ret;
> }
> - } else {
> + } else if (funcs->mode_fixup) {
> ret = funcs->mode_fixup(encoder, &crtc_state->mode,
> &crtc_state->adjusted_mode);
> if (!ret) {
> --
> 1.9.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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