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drm/amdgpu: fix NULL fence handling in amdgpu_cs_fence_to_handle_ioctl

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When the fence is already signaled it is perfectly normal to get a NULL
fence here. But since we can't export that we need to use a stub fence.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2018-12-03 14:05:34 +01:00
committed by Alex Deucher
parent e27a73d130
commit 4e9177134e
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
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@@ -1428,6 +1428,9 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
if (IS_ERR(fence)) if (IS_ERR(fence))
return PTR_ERR(fence); return PTR_ERR(fence);
if (!fence)
fence = dma_fence_get_stub();
switch (info->in.what) { switch (info->in.what) {
case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ: case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
r = drm_syncobj_create(&syncobj, 0, fence); r = drm_syncobj_create(&syncobj, 0, fence);