[PATCH] drm/amdgpu: remove dummy codes

[deathsimple@xxxxxxxxxxx (Christian König)]

Well clearly a NAK on this, why do you think this is just dummy code?

Am 04.11.2016 um 08:32 schrieb Flora Cui:
> Change-Id: I3238a2520c9161b1c2f9cf176158bdeb9cb21cbb
> Signed-off-by: Flora Cui <Flora.Cui at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 15 +--------------
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |  4 ----
>   2 files changed, 1 insertion(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 4068504..be2ad79 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -917,13 +917,6 @@ static int amdgpu_cs_ib_fill(struct amdgpu_device *adev,
>   
>   			memcpy(ib->ptr, kptr, chunk_ib->ib_bytes);
>   			amdgpu_bo_kunmap(aobj);
> -		} else {
> -			r =  amdgpu_ib_get(adev, vm, 0, ib);
> -			if (r) {
> -				DRM_ERROR("Failed to get ib !\n");
> -				return r;
> -			}
> -

This is the IB allocation and initialization for the VM case and vital 
to command submission.

>   		}
>   
>   		ib->gpu_addr = chunk_ib->va_start;
> @@ -1008,21 +1001,15 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
>   	job = p->job;
>   	p->job = NULL;
>   
> -	r = amd_sched_job_init(&job->base, &ring->sched, entity, p->filp);
> +	r = amdgpu_job_submit(job, ring, entity, p->filp, &p->fence);
>   	if (r) {
>   		amdgpu_job_free(job);
>   		return r;
>   	}
>   
> -	job->owner = p->filp;
> -	job->fence_ctx = entity->fence_context;
> -	p->fence = fence_get(&job->base.s_fence->finished);
>   	cs->out.handle = amdgpu_ctx_add_fence(p->ctx, ring, p->fence);
>   	job->uf_sequence = cs->out.handle;
> -	amdgpu_job_free_resources(job);
> -
>   	trace_amdgpu_cs_ioctl(job);
> -	amd_sched_entity_push_job(&job->base);

This results in a race condition because the job might already be freed 
after amdgpu_job_submit() succeeded.

>   
>   	return 0;
>   }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index d6c2839..c6448e1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -960,10 +960,6 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
>   
>   	ring = container_of(vm->entity.sched, struct amdgpu_ring, sched);
>   
> -	memset(&params, 0, sizeof(params));
> -	params.adev = adev;
> -	params.src = src;
> -

This indeed looks like a duplicate, probably a leftover merge issue.

Regards,
Christian.

>   	/* sync to everything on unmapping */
>   	if (!(flags & AMDGPU_PTE_VALID))
>   		owner = AMDGPU_FENCE_OWNER_UNDEFINED;