From: Imre Deak <imre.deak@intel.com>
Date: Fri, 29 Jan 2016 12:44:28 +0000 (+0200)
Subject: drm/mst: Don't ignore the MST PBN self-test result
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=441388a8a73f905359e60518cfc18eca6aed2b6a;p=openwrt%2Fstaging%2Fblogic.git

drm/mst: Don't ignore the MST PBN self-test result

Otherwise this call would have no effect.

Caught by Coverity.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: David Weinehall <david.weinehall@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index fe273b681fe5..2b7c2f068834 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2855,7 +2855,9 @@ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr,
 	if (!mgr->proposed_vcpis)
 		return -ENOMEM;
 	set_bit(0, &mgr->payload_mask);
-	test_calc_pbn_mode();
+	if (test_calc_pbn_mode() < 0)
+		DRM_ERROR("MST PBN self-test failed\n");
+
 	return 0;
 }
 EXPORT_SYMBOL(drm_dp_mst_topology_mgr_init);