From: Christian König christian.koenig@amd.com
Instead of coding the check ourself.
Signed-off-by: Christian König christian.koenig@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c index 4921de1..0499d2b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c @@ -87,6 +87,15 @@ static bool amdgpu_sync_test_owner(struct fence *f, void *owner) return false; }
+static void amdgpu_sync_keep_later(struct fence **keep, struct fence *fence) +{ + if (*keep && fence_is_later(*keep, fence)) + return; + + fence_put(*keep); + *keep = fence_get(fence); +} + /** * amdgpu_sync_fence - remember to sync to this fence * @@ -100,34 +109,21 @@ int amdgpu_sync_fence(struct amdgpu_device *adev, struct amdgpu_sync *sync, struct amdgpu_sync_entry *e; struct amdgpu_fence *fence; struct amdgpu_fence *other; - struct fence *tmp, *later;
if (!f) return 0;
if (amdgpu_sync_same_dev(adev, f) && - amdgpu_sync_test_owner(f, AMDGPU_FENCE_OWNER_VM)) { - if (sync->last_vm_update) { - tmp = sync->last_vm_update; - BUG_ON(f->context != tmp->context); - later = (f->seqno - tmp->seqno <= INT_MAX) ? f : tmp; - sync->last_vm_update = fence_get(later); - fence_put(tmp); - } else - sync->last_vm_update = fence_get(f); - } + amdgpu_sync_test_owner(f, AMDGPU_FENCE_OWNER_VM)) + amdgpu_sync_keep_later(&sync->last_vm_update, f);
fence = to_amdgpu_fence(f); if (!fence || fence->ring->adev != adev) { hash_for_each_possible(sync->fences, e, node, f->context) { - struct fence *new; if (unlikely(e->fence->context != f->context)) continue; - new = fence_get(fence_later(e->fence, f)); - if (new) { - fence_put(e->fence); - e->fence = new; - } + + amdgpu_sync_keep_later(&e->fence, f); return 0; }