[PATCH 15/28] drm/amdgpu: use dma_resv_for_each_fence for CS workaround

[Christian König]

Get the write fence using dma_resv_for_each_fence instead of accessing
it manually.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 53e407ea4c89..7facd614e50a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1268,6 +1268,8 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 	amdgpu_bo_list_for_each_entry(e, p->bo_list) {
 		struct dma_resv *resv = e->tv.bo->base.resv;
 		struct dma_fence_chain *chain = e->chain;
+		struct dma_resv_iter cursor;
+		struct dma_fence *fence;
 
 		if (!chain)
 			continue;
@@ -1277,9 +1279,10 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 		 * submission in a dma_fence_chain and add it as exclusive
 		 * fence.
 		 */
-		dma_fence_chain_init(chain, dma_resv_excl_fence(resv),
-				     dma_fence_get(p->fence), 1);
-
+		dma_resv_for_each_fence(&cursor, resv, false, fence) {
+			break;
+		}
+		dma_fence_chain_init(chain, fence, dma_fence_get(p->fence), 1);
 		rcu_assign_pointer(resv->fence_excl, &chain->base);
 		e->chain = NULL;
 	}
-- 
2.25.1