From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Thu, 19 Apr 2018 11:02:54 +0200
Subject: drm/amdgpu: cleanup amdgpu_vm_validate_pt_bos v2
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Git-commit: 91ccdd24a1955dbec97a6d61322be214b7de1974
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Use list_for_each_entry_safe here.

v2: Drop the optimization, it doesn't work as expected.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |   19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -224,21 +224,16 @@ int amdgpu_vm_validate_pt_bos(struct amd
 			      void *param)
 {
 	struct ttm_bo_global *glob = adev->mman.bdev.glob;
-	int r;
+	struct amdgpu_vm_bo_base *bo_base, *tmp;
+	int r = 0;
 
-	while (!list_empty(&vm->evicted)) {
-		struct amdgpu_vm_bo_base *bo_base;
-		struct amdgpu_bo *bo;
+	list_for_each_entry_safe(bo_base, tmp, &vm->evicted, vm_status) {
+		struct amdgpu_bo *bo = bo_base->bo;
 
-		bo_base = list_first_entry(&vm->evicted,
-					   struct amdgpu_vm_bo_base,
-					   vm_status);
-
-		bo = bo_base->bo;
 		if (bo->parent) {
 			r = validate(param, bo);
 			if (r)
-				return r;
+				break;
 
 			spin_lock(&glob->lru_lock);
 			ttm_bo_move_to_lru_tail(&bo->tbo);
@@ -251,7 +246,7 @@ int amdgpu_vm_validate_pt_bos(struct amd
 		    vm->use_cpu_for_update) {
 			r = amdgpu_bo_kmap(bo, NULL);
 			if (r)
-				return r;
+				break;
 		}
 
 		if (bo->tbo.type != ttm_bo_type_kernel) {
@@ -263,7 +258,7 @@ int amdgpu_vm_validate_pt_bos(struct amd
 		}
 	}
 
-	return 0;
+	return r;
 }
 
 /**