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drm/amdgpu: fix error handling in amdgpu_cs_process_fence_dep 

We always need to drop the ctx reference and should check
for errors first and then dereference the fence pointer.

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 2019-07-30 11:17:03 +02:00 committed by Alex Deucher
parent f0bc1ee473
commit 67d0859e27
1 changed files with 12 additions and 14 deletions
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26
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
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@ -1044,29 +1044,27 @@ static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,
return r;
}
fence = amdgpu_ctx_get_fence(ctx, entity,
deps[i].handle);
fence = amdgpu_ctx_get_fence(ctx, entity, deps[i].handle);
amdgpu_ctx_put(ctx);
if (IS_ERR(fence))
return PTR_ERR(fence);
else if (!fence)
continue;
if (chunk->chunk_id == AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES) {
struct drm_sched_fence *s_fence = to_drm_sched_fence(fence);
struct drm_sched_fence *s_fence;
struct dma_fence *old = fence;
s_fence = to_drm_sched_fence(fence);
fence = dma_fence_get(&s_fence->scheduled);
dma_fence_put(old);
}
if (IS_ERR(fence)) {
r = PTR_ERR(fence);
amdgpu_ctx_put(ctx);
r = amdgpu_sync_fence(p->adev, &p->job->sync, fence, true);
dma_fence_put(fence);
if (r)
return r;
} else if (fence) {
r = amdgpu_sync_fence(p->adev, &p->job->sync, fence,
true);
dma_fence_put(fence);
amdgpu_ctx_put(ctx);
if (r)
return r;
}
}
return 0;
}