[PATCH] drm/amdkfd: Fix an eviction fence leak

[Lang Yu]

dma_fence_get/put() should be called balanced in
init_kfd_vm() and amdgpu_amdkfd_gpuvm_destroy_cb().

Fixes: 9a1c1339abf9 ("drm/amdkfd: Run restore_workers on freezable WQs")

Signed-off-by: Lang Yu <lang...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index ce5ca304dba9..c3a4f8d297f7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -1586,6 +1586,7 @@ void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device 
*adev,
 
        /* Update process info */
        mutex_lock(&process_info->lock);
+       dma_fence_put(&process_info->eviction_fence->base);
        process_info->n_vms--;
        list_del(&vm->vm_list_node);
        mutex_unlock(&process_info->lock);
@@ -1598,7 +1599,6 @@ void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device 
*adev,
                WARN_ON(!list_empty(&process_info->userptr_valid_list));
                WARN_ON(!list_empty(&process_info->userptr_inval_list));
 
-               dma_fence_put(&process_info->eviction_fence->base);
                cancel_delayed_work_sync(&process_info->restore_userptr_work);
                put_pid(process_info->pid);
                mutex_destroy(&process_info->lock);
-- 
2.25.1