From 85c8c61007dd62aa611522dae361370e114cdb88 Mon Sep 17 00:00:00 2001 From: Lyude Paul Date: Wed, 14 Nov 2018 20:39:51 -0500 Subject: [PATCH] drm/nouveau/drm/nouveau: Check rc from drm_dp_mst_topology_mgr_resume() commit b89fdf7ae8500feae1100d8b283176a44d31d698 upstream. We need to actually make sure we check this on resume since otherwise we won't know whether or not the topology is still there once we've resumed, which will cause us to still think the topology is connected even after it's been removed if the removal happens mid-suspend. Signed-off-by: Lyude Paul Cc: stable@vger.kernel.org Signed-off-by: Ben Skeggs Signed-off-by: Ben Skeggs Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/dispnv50/disp.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index 2abcd7b..f889d41 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -1224,8 +1224,16 @@ nv50_mstm_fini(struct nv50_mstm *mstm) static void nv50_mstm_init(struct nv50_mstm *mstm) { - if (mstm && mstm->mgr.mst_state) - drm_dp_mst_topology_mgr_resume(&mstm->mgr); + int ret; + + if (!mstm || !mstm->mgr.mst_state) + return; + + ret = drm_dp_mst_topology_mgr_resume(&mstm->mgr); + if (ret == -1) { + drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false); + drm_kms_helper_hotplug_event(mstm->mgr.dev); + } } static void -- 2.7.4