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drm/amdgpu: Fix double free of dmabuf 

amdgpu_amdkfd_gpuvm_free_memory_of_gpu drop dmabuf reference increased in
amdgpu_gem_prime_export.
amdgpu_bo_destroy drop dmabuf reference increased in
amdgpu_gem_prime_import.

So remove this extra dma_buf_put to avoid double free.

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Tested-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
xinhui pan 2021-11-19 18:08:31 +08:00 committed by Alex Deucher
parent d3a21f7e35
commit 4eb6bb649f
1 changed files with 0 additions and 6 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
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@ -646,12 +646,6 @@ kfd_mem_attach_dmabuf(struct amdgpu_device *adev, struct kgd_mem *mem,
if (IS_ERR(gobj))
return PTR_ERR(gobj);
/* Import takes an extra reference on the dmabuf. Drop it now to
* avoid leaking it. We only need the one reference in
* kgd_mem->dmabuf.
*/
dma_buf_put(mem->dmabuf);
*bo = gem_to_amdgpu_bo(gobj);
(*bo)->flags |= AMDGPU_GEM_CREATE_PREEMPTIBLE;
(*bo)->parent = amdgpu_bo_ref(mem->bo);