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From fc8fa5e428ae937f79a36ccbe303fa871ffbbbf7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Mon, 20 Jul 2015 15:47:30 +0200
Subject: [PATCH 0357/1050] drm/amdgpu: no updates shouldn't cause vm flush v2
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
v2 (chk): split fix from original patch
Signed-off-by: monk.liu <monk.liu@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 0c8c990..1e895b9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -200,13 +200,15 @@ void amdgpu_vm_flush(struct amdgpu_ring *ring,
{
uint64_t pd_addr = amdgpu_bo_gpu_offset(vm->page_directory);
struct amdgpu_vm_id *vm_id = &vm->ids[ring->idx];
+ struct amdgpu_fence *flushed_updates = vm_id->flushed_updates;
- if (pd_addr != vm_id->pd_gpu_addr || !vm_id->flushed_updates ||
- amdgpu_fence_is_earlier(vm_id->flushed_updates, updates)) {
+ if (pd_addr != vm_id->pd_gpu_addr || !flushed_updates ||
+ (updates && amdgpu_fence_is_earlier(flushed_updates, updates))) {
trace_amdgpu_vm_flush(pd_addr, ring->idx, vm_id->id);
- amdgpu_fence_unref(&vm_id->flushed_updates);
- vm_id->flushed_updates = amdgpu_fence_ref(updates);
+ vm_id->flushed_updates = amdgpu_fence_ref(
+ amdgpu_fence_later(flushed_updates, updates));
+ amdgpu_fence_unref(&flushed_updates);
vm_id->pd_gpu_addr = pd_addr;
amdgpu_ring_emit_vm_flush(ring, vm_id->id, vm_id->pd_gpu_addr);
}
--
1.9.1
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