[PATCH] drm/dp/mst: Always clear proposed vcpi table for port.

[Andrey Grodzovsky]

Not clearing mst manager's proposed vcpis table for
destroyed connectors when the manager is stopped
leaves it pointing to unrefernced memory,
this causes pagefault when the manager is
restarted when plugging back a branch.

Fixes: 91a25e463130 ("drm/dp/mst: deallocate payload on port destruction")
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>
Reviewed-by: Lyude <cpaul at redhat.com>
Cc: stable at vger.kernel.org
Cc: Mykola Lysenko <Mykola.Lysenko at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>

---
 drivers/gpu/drm/drm_dp_mst_topology.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 9971c46..cd6014b 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2881,11 +2881,9 @@ static void drm_dp_destroy_connector_work(struct work_struct *work)
 		drm_dp_port_teardown_pdt(port, port->pdt);
 
 		if (!port->input && port->vcpi.vcpi > 0) {
-			if (mgr->mst_state) {
-				drm_dp_mst_reset_vcpi_slots(mgr, port);
-				drm_dp_update_payload_part1(mgr);
-				drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi);
-			}
+			drm_dp_mst_reset_vcpi_slots(mgr, port);
+			drm_dp_update_payload_part1(mgr);
+			drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi);
 		}
 
 		kref_put(&port->kref, drm_dp_free_mst_port);
-- 
1.9.1