From: Christian König <christian.koenig@amd.com>
Date: Thu, 3 Mar 2016 09:50:01 +0000 (+0100)
Subject: drm/amdgpu: sync to the active user on reusing a VMID
X-Git-Tag: v4.6-rc1~12^2~6^2~34
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a8bd1bec7c68dd5082012bcdd1d765e65b3ee05c;p=uclinux-h8%2Flinux.git

drm/amdgpu: sync to the active user on reusing a VMID

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index d9dc8bea5e98..364db7c45c67 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -188,6 +188,13 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 		if (!is_later && owner == (long)id &&
 		    pd_addr == id->pd_gpu_addr) {
 
+			r = amdgpu_sync_fence(ring->adev, sync,
+					      id->mgr_id->active);
+			if (r) {
+				mutex_unlock(&adev->vm_manager.lock);
+				return r;
+			}
+
 			fence_put(id->mgr_id->active);
 			id->mgr_id->active = fence_get(fence);