From 3e50b1d625f25cfa6336823c7ffd5b30893b8ac7 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Fri, 25 Apr 2025 19:49:05 +0530 Subject: [PATCH 3498/5403] drm/amdgpu: only keep most recent fence for each context MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Keep only the latest fences to reduce the number of values given back to userspace v2: - Export this code from dma-fence-unwrap.c(by Christian). v3: - To split this in a dma_buf patch and amd userq patch(by Sunil). - No need to add a new function just re-use existing(by Christian). v4: Export dma_fence_dedub_array function and used it(by Christian). Cc: Alex Deucher Cc: Arunpravin Paneer Selvam Reviewed-by: Sunil Khatri Reviewed-by: Christian König Signed-off-by: Arvind Yadav Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c index 34200cd04f27..029cb24c28b3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c @@ -852,6 +852,12 @@ int amdgpu_userq_wait_ioctl(struct drm_device *dev, void *data, fences[num_fences++] = fence; } + /* + * Keep only the latest fences to reduce the number of values + * given back to userspace. + */ + num_fences = dma_fence_dedup_array(fences, num_fences); + waitq = idr_find(&userq_mgr->userq_idr, wait_info->waitq_id); if (!waitq) goto free_fences; -- 2.54.0