From b1853c4bbe273273634a3666a29b659b7abe7634 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Fri, 17 Dec 2021 16:13:09 +0100
Subject: drm/amdgpu: audit bo->resource usage
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Git-commit: 63af82cf5e36b6ba3f3ebcdd1edd9f91934bfa59
Patch-mainline: v6.1-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
Make sure we can at least move and release BOs without backing store.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220707102453.3633-3-christian.koenig@amd.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 3 ++-
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index db27453b9e61..e6a9b9fc9e0b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -1309,7 +1309,7 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
if (bo->base.resv == &bo->base._resv)
amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo);
- if (bo->resource->mem_type != TTM_PL_VRAM ||
+ if (!bo->resource || bo->resource->mem_type != TTM_PL_VRAM ||
!(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE) ||
adev->in_suspend || adev->shutdown)
return;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 134575a3893c..2e97099808ca 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -471,7 +471,8 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
adev = amdgpu_ttm_adev(bo->bdev);
- if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
+ if (!old_mem || (old_mem->mem_type == TTM_PL_SYSTEM &&
+ bo->ttm == NULL)) {
ttm_bo_move_null(bo, new_mem);
goto out;
}
--
2.38.1