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drm/amdkfd: Fix leak in dmabuf import

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[ Upstream commit c897934da15f182ce99536007f8ef61c4748c07e ]

Release dmabuf reference before returning from kfd_ioctl_import_dmabuf.
amdgpu_amdkfd_gpuvm_import_dmabuf takes a reference to the underlying
GEM BO and doesn't keep the reference to the dmabuf wrapper.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felix Kuehling 2020-12-08 12:23:15 -05:00 • committed by Greg Kroah-Hartman
commit 2686041cef
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@ -1664,6 +1664,7 @@ static int kfd_ioctl_import_dmabuf(struct file *filep,
}
mutex_unlock(&p->mutex);
dma_buf_put(dmabuf);
args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
@ -1673,6 +1674,7 @@ err_free:
amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, (struct kgd_mem *)mem);
err_unlock:
mutex_unlock(&p->mutex);
dma_buf_put(dmabuf);
return r;
}