Commit e81a2557 authored by Christian König's avatar Christian König
Browse files

drm/ttm: use RCU in ttm_bo_flush_all_fences 



This allows it to call the function without the lock held.

Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarxinhui pan <xinhui.pan@amd.com>
Link: https://patchwork.freedesktop.org/patch/352742/
parent 832c90df

drivers/gpu/drm/ttm/ttm_bo.c

+6 −4
Original line number Diff line number Diff line
@@ -429,22 +429,24 @@ static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo) 


static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)

{

	struct dma_resv *resv = &bo->base._resv;

	struct dma_resv_list *fobj;

	struct dma_fence *fence;

	int i;



	fobj = dma_resv_get_list(&bo->base._resv);

	fence = dma_resv_get_excl(&bo->base._resv);

	rcu_read_lock();

	fobj = rcu_dereference(resv->fence);

	fence = rcu_dereference(resv->fence_excl);

	if (fence && !fence->ops->signaled)

		dma_fence_enable_sw_signaling(fence);



	for (i = 0; fobj && i < fobj->shared_count; ++i) {

		fence = rcu_dereference_protected(fobj->shared[i],

					dma_resv_held(bo->base.resv));

		fence = rcu_dereference(fobj->shared[i]);



		if (!fence->ops->signaled)

			dma_fence_enable_sw_signaling(fence);

	}

	rcu_read_unlock();

}



static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)

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