dcp hdmi hotplug crash patch 2

gistfile1.txt

diff --git a/drivers/gpu/drm/apple/dcp.c b/drivers/gpu/drm/apple/dcp.c
index 0dd0cd28a976..beeabdf9d3df 100644
--- a/drivers/gpu/drm/apple/dcp.c
+++ b/drivers/gpu/drm/apple/dcp.c
@@ -1149,6 +1149,12 @@ void dcp_flush(struct drm_crtc *crtc, struct drm_atomic_state *state)
                u32 handle = 2;

                mode = lookup_mode(dcp, &crtc_state->mode);
+               if (!mode) {
+                       dev_warn(dcp->dev, "no match for " DRM_MODE_FMT,
+                                DRM_MODE_ARG(&crtc_state->mode));
+                       schedule_work(&dcp->vblank_wq);
+                       return;
+               }

                dcp->mode = (struct dcp_set_digital_out_mode_req) {
                        .color_mode_id = mode->color_mode_id,