The patch below does not apply to the 4.13-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 5b7f8404b217613918a0ebe40ea5511990ab2e35 Mon Sep 17 00:00:00 2001
From: Chunming Zhou <David1.Zhou@xxxxxxx>
Date: Fri, 11 Aug 2017 09:34:33 +0800
Subject: [PATCH] drm/amdgpu: save list length when fence is signaled
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
update the list first to avoid redundant checks.
Signed-off-by: Chunming Zhou <David1.Zhou@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index a6899180b265..c586f44312f9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -244,6 +244,12 @@ struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
struct dma_fence *f = e->fence;
struct amd_sched_fence *s_fence = to_amd_sched_fence(f);
+ if (dma_fence_is_signaled(f)) {
+ hash_del(&e->node);
+ dma_fence_put(f);
+ kmem_cache_free(amdgpu_sync_slab, e);
+ continue;
+ }
if (ring && s_fence) {
/* For fences from the same ring it is sufficient
* when they are scheduled.
@@ -256,13 +262,6 @@ struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
}
}
- if (dma_fence_is_signaled(f)) {
- hash_del(&e->node);
- dma_fence_put(f);
- kmem_cache_free(amdgpu_sync_slab, e);
- continue;
- }
-
return f;
}