4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lyude Paul <lyude@xxxxxxxxxx> commit 7c4512300cfa5a4dcc8c1c52ae61e3fa4bd11a39 upstream. This hasn't caused any issues yet that I'm aware of, but as Ville Syrjälä pointed out - we need to make sure that intel_connector->mst_port is set before initializing MST connectors, since in theory we could potentially check intel_connector->mst_port in i915_hpd_poll_init_work() after registering the connector but before having written it's value. Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Link: https://patchwork.freedesktop.org/patch/msgid/20181106213017.14563-2-lyude@xxxxxxxxxx (cherry picked from commit 66a5ab1034be801630816d1fa6cfc30db1a2f0b0) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp_mst.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -464,6 +464,10 @@ static struct drm_connector *intel_dp_ad if (!intel_connector) return NULL; + intel_connector->get_hw_state = intel_dp_mst_get_hw_state; + intel_connector->mst_port = intel_dp; + intel_connector->port = port; + connector = &intel_connector->base; ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); @@ -474,10 +478,6 @@ static struct drm_connector *intel_dp_ad drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); - intel_connector->get_hw_state = intel_dp_mst_get_hw_state; - intel_connector->mst_port = intel_dp; - intel_connector->port = port; - for_each_pipe(dev_priv, pipe) { struct drm_encoder *enc = &intel_dp->mst_encoders[pipe]->base.base;
