drm/etnaviv: use new iterator in etnaviv_gem_describe

Instead of hand rolling the logic.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025080532.177424-2-christian.koenig@amd.com

drivers/gpu/drm/etnaviv/etnaviv_gem.c

@@ -427,19 +427,17 @@ int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
 static void etnaviv_gem_describe_fence(struct dma_fence *fence,
 	const char *type, struct seq_file *m)
 {
-	if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
-		seq_printf(m, "\t%9s: %s %s seq %llu\n",
-			   type,
-			   fence->ops->get_driver_name(fence),
-			   fence->ops->get_timeline_name(fence),
-			   fence->seqno);
+	seq_printf(m, "\t%9s: %s %s seq %llu\n", type,
+		   fence->ops->get_driver_name(fence),
+		   fence->ops->get_timeline_name(fence),
+		   fence->seqno);
 }
 
 static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
 {
 	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
 	struct dma_resv *robj = obj->resv;
-	struct dma_resv_list *fobj;
+	struct dma_resv_iter cursor;
 	struct dma_fence *fence;
 	unsigned long off = drm_vma_node_start(&obj->vma_node);
 
@@ -448,21 +446,14 @@ static void etnaviv_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
 			obj->name, kref_read(&obj->refcount),
 			off, etnaviv_obj->vaddr, obj->size);
 
-	rcu_read_lock();
-	fobj = dma_resv_shared_list(robj);
-	if (fobj) {
-		unsigned int i, shared_count = fobj->shared_count;
-
-		for (i = 0; i < shared_count; i++) {
-			fence = rcu_dereference(fobj->shared[i]);
+	dma_resv_iter_begin(&cursor, robj, true);
+	dma_resv_for_each_fence_unlocked(&cursor, fence) {
+		if (dma_resv_iter_is_exclusive(&cursor))
+			etnaviv_gem_describe_fence(fence, "Exclusive", m);
+		else
 			etnaviv_gem_describe_fence(fence, "Shared", m);
-		}
 	}
-
-	fence = dma_resv_excl_fence(robj);
-	if (fence)
-		etnaviv_gem_describe_fence(fence, "Exclusive", m);
-	rcu_read_unlock();
+	dma_resv_iter_end(&cursor);
 }
 
 void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,