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Andrey Grodzovsky f6a3f66063 drm/amdgpu: Get rid of amdgpu_job->external_hw_fence
This is a follow-up cleanup to [1]. See bellow refcount balancing
for calling amdgpu_job_submit_direct after this cleanup as far
as I calculated.

amdgpu_fence_emit
	dma_fence_init 1
	dma_fence_get(fence) 2
	rcu_assign_pointer(*ptr, dma_fence_get(fence) 3

---> amdgpu_job_submit_direct completes before fence signaled
			amdgpu_sa_bo_free
				(*sa_bo)->fence = dma_fence_get(fence) 4

			amdgpu_job_free
				dma_fence_put 3

			amdgpu_vcn_enc_get_destroy_msg
				*fence = dma_fence_get(f) 4
				dma_fence_put(f); 3

			amdgpu_vcn_enc_ring_test_ib
				dma_fence_put(fence) 2

			amdgpu_fence_process
				dma_fence_put 1

			amdgpu_sa_bo_remove_locked
				dma_fence_put 0

---> amdgpu_job_submit_direct completes after fence signaled
			amdgpu_fence_process
				dma_fence_put 2

			amdgpu_job_free
				dma_fence_put 1

			amdgpu_vcn_enc_get_destroy_msg
				*fence = dma_fence_get(f) 2
				dma_fence_put(f); 1

			amdgpu_vcn_enc_ring_test_ib
				dma_fence_put(fence) 0

[1] - https://patchwork.kernel.org/project/dri-devel/cover/20220624180955.485440-1-andrey.grodzovsky@amd.com/

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2022-07-18 16:37:25 -04:00
2022-07-10 13:55:49 -07:00
2022-07-10 14:40:51 -07:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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