diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index bcb3548..132e17a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1374,46 +1374,24 @@ int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
 			   uint64_t addr, struct amdgpu_bo **bo,
 			   struct amdgpu_bo_va_mapping **map)
 {
+	struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
+	struct amdgpu_vm *vm = &fpriv->vm;
 	struct amdgpu_bo_va_mapping *mapping;
-	unsigned i;
 	int r;
 
-	if (!parser->bo_list)
-		return 0;
-
 	addr /= AMDGPU_GPU_PAGE_SIZE;
 
-	for (i = 0; i < parser->bo_list->num_entries; i++) {
-		struct amdgpu_bo_list_entry *lobj;
-
-		lobj = &parser->bo_list->array[i];
-		if (!lobj->bo_va)
-			continue;
-
-		list_for_each_entry(mapping, &lobj->bo_va->valids, list) {
-			if (mapping->start > addr ||
-			    addr > mapping->last)
-				continue;
-
-			*bo = lobj->bo_va->base.bo;
-			*map = mapping;
-			goto found;
-		}
-
-		list_for_each_entry(mapping, &lobj->bo_va->invalids, list) {
-			if (mapping->start > addr ||
-			    addr > mapping->last)
-				continue;
+	mapping = amdgpu_vm_bo_lookup_mapping(vm, addr);
+	if (!mapping || !mapping->bo_va || !mapping->bo_va->base.bo)
+		return -EINVAL;
 
-			*bo = lobj->bo_va->base.bo;
-			*map = mapping;
-			goto found;
-		}
-	}
+	*bo = mapping->bo_va->base.bo;
+	*map = mapping;
 
-	return -EINVAL;
+	/* Double check that the BO is reserved by this CS */
+	if (READ_ONCE((*bo)->tbo.resv->lock.ctx) != &parser->ticket)
+		return -EINVAL;
 
-found:
 	r = amdgpu_ttm_bind(&(*bo)->tbo, &(*bo)->tbo.mem);
 	if (unlikely(r))
 		return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 42492e6..a4891be 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -35,6 +35,7 @@
 
 /* bo virtual addresses in a vm */
 struct amdgpu_bo_va_mapping {
+	struct amdgpu_bo_va		*bo_va;
 	struct list_head		list;
 	struct rb_node			rb;
 	uint64_t			start;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index cfc8de8..ab9dfd7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2083,6 +2083,7 @@ static void amdgpu_vm_bo_insert_map(struct amdgpu_device *adev,
 	struct amdgpu_vm *vm = bo_va->base.vm;
 	struct amdgpu_bo *bo = bo_va->base.bo;
 
+	mapping->bo_va = bo_va;
 	list_add(&mapping->list, &bo_va->invalids);
 	amdgpu_vm_it_insert(mapping, &vm->va);
 
@@ -2260,6 +2261,7 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
 
 	list_del(&mapping->list);
 	amdgpu_vm_it_remove(mapping, &vm->va);
+	mapping->bo_va = NULL;
 	trace_amdgpu_vm_bo_unmap(bo_va, mapping);
 
 	if (valid)
@@ -2345,6 +2347,7 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
 		if (tmp->last > eaddr)
 		    tmp->last = eaddr;
 
+		tmp->bo_va = NULL;
 		list_add(&tmp->list, &vm->freed);
 		trace_amdgpu_vm_bo_unmap(NULL, tmp);
 	}
@@ -2371,6 +2374,19 @@ int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
 }
 
 /**
+ * amdgpu_vm_bo_lookup_mapping - find mapping by address
+ *
+ * @vm: the requested VM
+ *
+ * Find a mapping by it's address.
+ */
+struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
+							 uint64_t addr)
+{
+	return amdgpu_vm_it_iter_first(&vm->va, addr, addr);
+}
+
+/**
  * amdgpu_vm_bo_rmv - remove a bo to a specific vm
  *
  * @adev: amdgpu_device pointer
@@ -2395,6 +2411,7 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
 	list_for_each_entry_safe(mapping, next, &bo_va->valids, list) {
 		list_del(&mapping->list);
 		amdgpu_vm_it_remove(mapping, &vm->va);
+		mapping->bo_va = NULL;
 		trace_amdgpu_vm_bo_unmap(bo_va, mapping);
 		list_add(&mapping->list, &vm->freed);
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 90b7741..c1accd1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -276,6 +276,8 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
 				struct amdgpu_vm *vm,
 				uint64_t saddr, uint64_t size);
+struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
+							 uint64_t addr);
 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
 		      struct amdgpu_bo_va *bo_va);
 void amdgpu_vm_set_fragment_size(struct amdgpu_device *adev,
