From 242a42eadfc17448a0d5b2ffc0cb191c8b51971a Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Date: Tue, 17 Jun 2014 15:01:48 +0200
Subject: [PATCH] drm/nouveau/disp: fix oops in destructor with headless cards
If init doesn't run then disp->outp might not be initialized, resulting
in an oops.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
drivers/gpu/drm/nouveau/core/engine/disp/base.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/base.c b/drivers/gpu/drm/nouveau/core/engine/disp/base.c
index c41f656abe64..9c38c5e40500 100644
--- a/drivers/gpu/drm/nouveau/core/engine/disp/base.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/base.c
@@ -99,8 +99,10 @@ _nouveau_disp_dtor(struct nouveau_object *object)
nouveau_event_destroy(&disp->vblank);
- list_for_each_entry_safe(outp, outt, &disp->outp, head) {
- nouveau_object_ref(NULL, (struct nouveau_object **)&outp);
+ if (disp->outp.next) {
+ list_for_each_entry_safe(outp, outt, &disp->outp, head) {
+ nouveau_object_ref(NULL, (struct nouveau_object **)&outp);
+ }
}
nouveau_engine_destroy(&disp->base);