drm/nouveau/drm: fix crash in vram manager debug callback

It's probably impossible to hit it now on mainline kernel.
I only noticed it because one of my debugging patches uses it.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index 9be9cb5..9c60ef6 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -35,14 +35,16 @@
 static int
 nouveau_vram_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
 {
-       /* nothing to do */
+       struct nouveau_drm *drm = nouveau_bdev(man->bdev);
+       struct nouveau_fb *pfb = nouveau_fb(drm->device);
+       man->priv = pfb;
        return 0;
 }
 
 static int
 nouveau_vram_manager_fini(struct ttm_mem_type_manager *man)
 {
-       /* nothing to do */
+       man->priv = NULL;
        return 0;
 }
 
@@ -104,7 +106,8 @@ nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
 static void
 nouveau_vram_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
 {
-       struct nouveau_mm *mm = man->priv;
+       struct nouveau_fb *pfb = man->priv;
+       struct nouveau_mm *mm = &pfb->vram;
        struct nouveau_mm_node *r;
        u32 total = 0, free = 0;