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drm/nouveau/ttm: don't dereference nvbo::cli, it can outlive client 

Potentially responsible for some random OOPSes.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org [v4.15+]
hifive-unleashed-5.1
Ben Skeggs 2018-05-08 20:39:47 +10:00
parent a02cbe2e34
commit 0d5a03c3d9
3 changed files with 3 additions and 6 deletions
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1
drivers/gpu/drm/nouveau/nouveau_bo.c
View File

@ -214,7 +214,6 @@ nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
INIT_LIST_HEAD(&nvbo->entry);
INIT_LIST_HEAD(&nvbo->vma_list);
nvbo->bo.bdev = &drm->ttm.bdev;
nvbo->cli = cli;
/* This is confusing, and doesn't actually mean we want an uncached
* mapping, but is what NOUVEAU_GEM_DOMAIN_COHERENT gets translated

2
drivers/gpu/drm/nouveau/nouveau_bo.h
View File

@ -26,8 +26,6 @@ struct nouveau_bo {
struct list_head vma_list;
struct nouveau_cli *cli;
unsigned contig:1;
unsigned page:5;
unsigned kind:8;

6
drivers/gpu/drm/nouveau/nouveau_ttm.c
View File

@ -63,7 +63,7 @@ nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
struct ttm_mem_reg *reg)
{
struct nouveau_bo *nvbo = nouveau_bo(bo);
struct nouveau_drm *drm = nvbo->cli->drm;
struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
struct nouveau_mem *mem;
int ret;
@ -103,7 +103,7 @@ nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
struct ttm_mem_reg *reg)
{
struct nouveau_bo *nvbo = nouveau_bo(bo);
struct nouveau_drm *drm = nvbo->cli->drm;
struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
struct nouveau_mem *mem;
int ret;
@ -131,7 +131,7 @@ nv04_gart_manager_new(struct ttm_mem_type_manager *man,
struct ttm_mem_reg *reg)
{
struct nouveau_bo *nvbo = nouveau_bo(bo);
struct nouveau_drm *drm = nvbo->cli->drm;
struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
struct nouveau_mem *mem;
int ret;