[PATCH] drm/amdgpu: Handle NULL bo->tbo.resource (again) in amdgpu_vm_bo_update

["Michel Dänzer" <michel@daenzer.net>]

From: Michel Dänzer <mdaenzer@redhat.com>

Third time's the charm, I hope?

Fixes: d3116756a710 ("drm/ttm: rename bo->mem and make it a pointer")
Issue: https://gitlab.freedesktop.org/drm/amd/-/issues/3837
Signed-off-by: Michel Dänzer <mdaenzer@redhat.com>
---

Or should amdgpu_vm_bo_evicted be called in the !bo->tbo.resource case
as well?

 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index ddd7f05e4db9..c9c48b782ec1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1266,10 +1266,9 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va,
 	 * next command submission.
 	 */
 	if (amdgpu_vm_is_bo_always_valid(vm, bo)) {
-		uint32_t mem_type = bo->tbo.resource->mem_type;
-
-		if (!(bo->preferred_domains &
-		      amdgpu_mem_type_to_domain(mem_type)))
+		if (bo->tbo.resource &&
+		    !(bo->preferred_domains &
+		      amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type)))
 			amdgpu_vm_bo_evicted(&bo_va->base);
 		else
 			amdgpu_vm_bo_idle(&bo_va->base);
-- 
2.45.2