From: jsg <jsg@openbsd.org>
Date: Mon, 27 Mar 2023 07:32:07 +0000 (+0000)
Subject: drm/display/dp_mst: Fix down/up message handling after sink disconnect
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=3b10c59534a68700bb1e2654ea519e3446b269fb;p=openbsd

drm/display/dp_mst: Fix down/up message handling after sink disconnect

From Imre Deak
b30fcedeba643ca16eaa6212c1245598b7cd830d in linux-6.1.y/6.1.18
1d082618bbf3b6755b8cc68c0a8122af2842d593 in mainline linux
---

diff --git a/sys/dev/pci/drm/display/drm_dp_mst_topology.c b/sys/dev/pci/drm/display/drm_dp_mst_topology.c
index 3d4c084f389..9f5ce28ff1b 100644
--- a/sys/dev/pci/drm/display/drm_dp_mst_topology.c
+++ b/sys/dev/pci/drm/display/drm_dp_mst_topology.c
@@ -3654,6 +3654,9 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms
 		drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, 0);
 		ret = 0;
 		mgr->payload_id_table_cleared = false;
+
+		memset(&mgr->down_rep_recv, 0, sizeof(mgr->down_rep_recv));
+		memset(&mgr->up_req_recv, 0, sizeof(mgr->up_req_recv));
 	}
 
 out_unlock: