[SNIP]
+int amdgpu_userq_wait_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *filp)
+{
+ struct drm_amdgpu_userq_fence_info *fence_info = NULL;
+ struct drm_amdgpu_userq_wait *wait_info = data;
+ u32 *syncobj_handles, *bo_handles;
+ struct dma_fence **fences = NULL;
+ u32 num_syncobj, num_bo_handles;
+ struct drm_gem_object **gobj;
+ struct drm_exec exec;
+ int r, i, entry, cnt;
+ u64 num_fences = 0;
+
+ num_bo_handles = wait_info->num_bo_handles;
+ bo_handles =
memdup_user(u64_to_user_ptr(wait_info->bo_handles_array),
+ sizeof(u32) * num_bo_handles);
+ if (IS_ERR(bo_handles))
+ return PTR_ERR(bo_handles);
+
+ num_syncobj = wait_info->num_syncobj_handles;
+ syncobj_handles =
memdup_user(u64_to_user_ptr(wait_info->syncobj_handles_array),
+ sizeof(u32) * num_syncobj);
+ if (IS_ERR(syncobj_handles)) {
+ r = PTR_ERR(syncobj_handles);
+ goto free_bo_handles;
+ }
+
+ /* Array of GEM object handles */
+ gobj = kmalloc_array(num_bo_handles, sizeof(*gobj), GFP_KERNEL);
+ if (!gobj) {
+ r = -ENOMEM;
+ goto free_syncobj_handles;
+ }
+
+ for (entry = 0; entry < num_bo_handles; entry++) {
+ gobj[entry] = drm_gem_object_lookup(filp,
bo_handles[entry]);
+ if (!gobj[entry]) {
+ r = -ENOENT;
+ goto put_gobj;
+ }
+ }
+
+ drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
+ drm_exec_until_all_locked(&exec) {
+ r = drm_exec_prepare_array(&exec, gobj, num_bo_handles, 0);
+ drm_exec_retry_on_contention(&exec);
+ if (r) {
+ drm_exec_fini(&exec);
+ goto put_gobj;
+ }
+ }
+
+ if (!wait_info->num_fences) {
+ /* Count syncobj's fence */
+ for (i = 0; i < num_syncobj; i++) {
+ struct dma_fence *fence;
+
+ r = drm_syncobj_find_fence(filp, syncobj_handles[i],
+ 0, 0, &fence);
+ dma_fence_put(fence);
+
+ if (r || !fence)
+ continue;
+
+ num_fences++;
+ }
+
+ /* Count GEM objects fence */
+ for (i = 0; i < num_bo_handles; i++) {
+ struct dma_resv_iter resv_cursor;
+ struct dma_fence *fence;
+
+ dma_resv_for_each_fence(&resv_cursor, gobj[i]->resv,
+ dma_resv_usage_rw(wait_info->bo_wait_flags &
+ AMDGPU_USERQ_BO_WRITE), fence)
+ num_fences++;
