Hi Sean,
Thank you for the patch.
On Mon, Jun 17, 2019 at 02:15:42PM -0400, Sean Paul wrote:
> From: Sean Paul <seanpaul@xxxxxxxxxxxx>
>
> drm_atomic_get_crtc_state() returns an error pointer when it fails, so
> the null check is doing nothing here.
>
> Credit to 0-day/Dan Carpenter for reporting this.
>
> Fixes: 6f3b62781bbd ("drm: Convert connector_helper_funcs->atomic_check to accept drm_atomic_state")
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> Cc: Eric Anholt <eric@xxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> [for rcar lvds]
> Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> Cc: Sean Paul <sean@xxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Lyude Paul <lyude@xxxxxxxxxx>
> Cc: Karol Herbst <karolherbst@xxxxxxxxx>
> Cc: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
I have no pending conflicting changes for rcar_lvds.c. Do you plan to
merge this through drm-misc ?
> ---
> drivers/gpu/drm/rcar-du/rcar_lvds.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> index f2a5d4d997073..1c62578590f46 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> @@ -115,8 +115,8 @@ static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
>
> /* We're not allowed to modify the resolution. */
> crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc);
> - if (!crtc_state)
> - return -EINVAL;
> + if (IS_ERR(crtc_state))
> + return PTR_ERR(crtc_state);
>
> if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
> crtc_state->mode.vdisplay != panel_mode->vdisplay)
--
Regards,
Laurent Pinchart
