Instead of signaling failure by setting the node pointer to NULL do so by returning -ENOSPC.
v2: add memset() to make sure that mem is always initialized.
Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 4 +--- drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 5 ++--- drivers/gpu/drm/nouveau/nouveau_ttm.c | 8 -------- drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++------ drivers/gpu/drm/ttm/ttm_bo_manager.c | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 4 +--- 6 files changed, 11 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c index 627104401e84..2baa80224fa4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c @@ -229,7 +229,7 @@ static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man, if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) && atomic64_read(&mgr->available) < mem->num_pages) { spin_unlock(&mgr->lock); - return 0; + return -ENOSPC; } atomic64_sub(mem->num_pages, &mgr->available); spin_unlock(&mgr->lock); @@ -249,8 +249,6 @@ static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man, r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem); if (unlikely(r)) { kfree(node); - mem->mm_node = NULL; - r = 0; goto err_out; } } else { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c index 128a667ed8fa..e8d1dd564006 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c @@ -336,8 +336,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man, mem_bytes = (u64)mem->num_pages << PAGE_SHIFT; if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) { atomic64_sub(mem_bytes, &mgr->usage); - mem->mm_node = NULL; - return 0; + return -ENOSPC; }
if (place->flags & TTM_PL_FLAG_CONTIGUOUS) { @@ -417,7 +416,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man, atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage);
kvfree(nodes); - return r == -ENOSPC ? 0 : r; + return r; }
/** diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c index 7ca0a2498532..e89ea052cf71 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -75,10 +75,6 @@ nouveau_vram_manager_new(struct ttm_mem_type_manager *man, ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page); if (ret) { nouveau_mem_del(reg); - if (ret == -ENOSPC) { - reg->mm_node = NULL; - return 0; - } return ret; }
@@ -139,10 +135,6 @@ nv04_gart_manager_new(struct ttm_mem_type_manager *man, reg->num_pages << PAGE_SHIFT, &mem->vma[0]); if (ret) { nouveau_mem_del(reg); - if (ret == -ENOSPC) { - reg->mm_node = NULL; - return 0; - } return ret; }
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index f78cfc76ad78..06b8bc0d8f23 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -909,10 +909,10 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, ticket = dma_resv_locking_ctx(bo->base.resv); do { ret = (*man->func->get_node)(man, bo, place, mem); - if (unlikely(ret != 0)) - return ret; - if (mem->mm_node) + if (likely(!ret)) break; + if (unlikely(ret != -ENOSPC)) + return ret; ret = ttm_mem_evict_first(bdev, mem->mem_type, place, ctx, ticket); if (unlikely(ret != 0)) @@ -1056,12 +1056,11 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
man = &bdev->man[mem->mem_type]; ret = (*man->func->get_node)(man, bo, place, mem); + if (ret == -ENOSPC) + continue; if (unlikely(ret)) goto error;
- if (!mem->mm_node) - continue; - ret = ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu); if (unlikely(ret)) { (*man->func->put_node)(man, mem); @@ -1121,6 +1120,7 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
dma_resv_assert_held(bo->base.resv);
+ memset(&mem, 0, sizeof(mem)); mem.num_pages = bo->num_pages; mem.size = mem.num_pages << PAGE_SHIFT; mem.page_alignment = bo->mem.page_alignment; diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c b/drivers/gpu/drm/ttm/ttm_bo_manager.c index 18d3debcc949..facd3049c3aa 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_manager.c +++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c @@ -86,7 +86,7 @@ static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man, mem->start = node->start; }
- return 0; + return ret; }
static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man, diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c index 7da752ca1c34..4a76fc7114ad 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c @@ -53,8 +53,6 @@ static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, (struct vmwgfx_gmrid_man *)man->priv; int id;
- mem->mm_node = NULL; - id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL); if (id < 0) return (id != -ENOMEM ? 0 : id); @@ -78,7 +76,7 @@ static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, gman->used_gmr_pages -= bo->num_pages; spin_unlock(&gman->lock); ida_free(&gman->gmr_ida, id); - return 0; + return -ENOSPC; }
static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,