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From 9260fa6b907678e7e58cb6b14cde723bcb18a8cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Mon, 3 Dec 2018 14:05:34 +0100
Subject: [PATCH 0940/2940] drm/amdgpu: fix NULL fence handling in
amdgpu_cs_fence_to_handle_ioctl
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 2bcd3d74de5d..b5258697a4f8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1432,6 +1432,9 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
if (IS_ERR(fence))
return PTR_ERR(fence);
+ if (!fence)
+ fence = dma_fence_get_stub();
+
switch (info->in.what) {
case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
r = drm_syncobj_create(&syncobj, 0, fence);
--
2.17.1
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