[PATCH 3/6] drm/nouveau: Stop reading port->mgr in nv50_mstc_get_modes()

[Lyude Paul <lyude@redhat.com>]

mstc->port isn't validated here so it could be null or worse when we
access it. And drivers aren't ever supposed to be looking at it's
contents anyway. Plus, we can already get the MST manager from
&mstc->mstm->mgr.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index e6f72ca0b1fa..66c40b56a0cb 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -893,7 +893,8 @@ nv50_mstc_get_modes(struct drm_connector *connector)
 	struct nv50_mstc *mstc = nv50_mstc(connector);
 	int ret = 0;
 
-	mstc->edid = drm_dp_mst_get_edid(&mstc->connector, mstc->port->mgr, mstc->port);
+	mstc->edid = drm_dp_mst_get_edid(&mstc->connector,
+					 &mstc->mstm->mgr, mstc->port);
 	drm_connector_update_edid_property(&mstc->connector, mstc->edid);
 	if (mstc->edid)
 		ret = drm_add_edid_modes(&mstc->connector, mstc->edid);
-- 
2.19.1