From ca0b954a4315ca2228001c439ae1062561c81989 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Mon, 5 Jun 2023 11:11:22 +0200
Subject: [PATCH] drm/amdgpu: make sure that BOs have a backing store
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit
It's perfectly possible that the BO is about to be destroyed and doesn't
have a backing store associated with it.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Guchun Chen <guchun.chen@amd.com>
Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 54cd21c06a44f..f7905bce0de15 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -1282,8 +1282,12 @@ void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
struct amdgpu_mem_stats *stats)
{
- unsigned int domain;
uint64_t size = amdgpu_bo_size(bo);
+ unsigned int domain;
+
+ /* Abort if the BO doesn't currently have a backing store */
+ if (!bo->tbo.resource)
+ return;
domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
switch (domain) {
--
2.30.2