[PATCH 01/14] drm/amdgpu: fix wrong release of vmid owner

[Alex Deucher]

From: Chunming Zhou <david1.z...@amd.com>

The release of the vmid owner was not handled
correctly.  We need to take the lock and walk
the lru list.

Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Monk Liu <monk.liu at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 856116a..e06d066 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1454,6 +1454,7 @@ error_free_sched_entity:
 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 {
        struct amdgpu_bo_va_mapping *mapping, *tmp;
+       struct amdgpu_vm_id *id, *id_tmp;
        int i;

        amd_sched_entity_fini(vm->entity.sched, &vm->entity);
@@ -1478,14 +1479,17 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct 
amdgpu_vm *vm)
        amdgpu_bo_unref(&vm->page_directory);
        fence_put(vm->page_directory_fence);

-       for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
-               struct amdgpu_vm_id *id = vm->ids[i];
-
+       mutex_lock(&adev->vm_manager.lock);
+       list_for_each_entry_safe(id, id_tmp, &adev->vm_manager.ids_lru,
+                                list) {
                if (!id)
                        continue;
-
-               atomic_long_cmpxchg(&id->owner, (long)vm, 0);
+               if (atomic_long_read(&id->owner) == (long)vm) {
+                       atomic_long_set(&id->owner, 0);
+                       id->pd_gpu_addr = 0;
+               }
        }
+       mutex_unlock(&adev->vm_manager.lock);
 }

 /**
-- 
2.5.5