drm/amdgpu: always reserve two slots for the VM

And drop the now superflous extra reservations.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 9 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 39fb5d24cc51..b303ac79c2f6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -617,7 +617,8 @@ void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
 {
         entry->priority = 0;
         entry->tv.bo = &vm->root.base.bo->tbo;
-        entry->tv.num_shared = 1;
+        /* One for the VM updates and one for the CS job */
+        entry->tv.num_shared = 2;
         entry->user_pages = NULL;
         list_add(&entry->tv.head, validated);
 }
@@ -773,10 +774,6 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
 
         ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
 
-        r = reservation_object_reserve_shared(bo->tbo.resv, 1);
-        if (r)
-                return r;
-
         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
         if (r)
                 goto error;
@@ -1842,10 +1839,6 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
         if (r)
                 goto error_free;
 
-        r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv, 1);
-        if (r)
-                goto error_free;
-
         r = amdgpu_vm_update_ptes(&params, start, last + 1, addr, flags);
         if (r)
                 goto error_free;
@@ -3026,6 +3019,10 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
         if (r)
                 goto error_free_root;
 
+        r = reservation_object_reserve_shared(root->tbo.resv, 1);
+        if (r)
+                goto error_unreserve;
+
         r = amdgpu_vm_clear_bo(adev, vm, root,
                                adev->vm_manager.root_level,
                                vm->pte_support_ats);