1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 27fbd79d0daf..e17fbdaf874b 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1672,13 +1672,19 @@ static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr,
         u8 sinks[DRM_DP_MAX_SDP_STREAMS];
         int i;
 
+        port = drm_dp_get_validated_port_ref(mgr, port);
+        if (!port)
+                return -EINVAL;
+
         port_num = port->port_num;
         mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent);
         if (!mstb) {
                 mstb = drm_dp_get_last_connected_port_and_mstb(mgr, port->parent, &port_num);
 
-                if (!mstb)
+                if (!mstb) {
+                        drm_dp_put_port(port);
                         return -EINVAL;
+                }
         }
 
         txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
@@ -1707,6 +1713,7 @@ static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr,
         kfree(txmsg);
 fail_put:
         drm_dp_put_mst_branch_device(mstb);
+        drm_dp_put_port(port);
         return ret;
 }