From a62888d3648f88e3a46b322bf9cfb50714d18a1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Thu, 23 Jan 2025 14:59:01 +0100
Subject: [PATCH] drm/amdgpu: overwrite signaled fence in amdgpu_sync
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This allows using amdgpu_sync even without peeking into the fences for a
long time.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index 86c17a8946f5d..bfe12164d27da 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -135,11 +135,16 @@ static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f)
struct amdgpu_sync_entry *e;
hash_for_each_possible(sync->fences, e, node, f->context) {
- if (unlikely(e->fence->context != f->context))
- continue;
+ if (dma_fence_is_signaled(e->fence)) {
+ dma_fence_put(e->fence);
+ e->fence = dma_fence_get(f);
+ return true;
+ }
- amdgpu_sync_keep_later(&e->fence, f);
- return true;
+ if (likely(e->fence->context == f->context)) {
+ amdgpu_sync_keep_later(&e->fence, f);
+ return true;
+ }
}
return false;
}
--
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