+static void cma_query_sa_classport_info_cb(int status,
+ struct ib_class_port_info *rec,
+ void *context)
+{
+ struct class_port_info_context *cb_ctx = context;
+
+ WARN_ON(!context);
+
+ if (status || !rec) {
+ pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
+ cb_ctx->device->name, cb_ctx->port_num, status);
+ goto out;
+ }
+
+ memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info));
+
+out:
+ complete(&cb_ctx->done);
+}
+
+static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num,
+ struct ib_class_port_info *class_port_info)
+{
+ struct class_port_info_context *cb_ctx;
+ int ret;
+
+ cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL);
+ if (!cb_ctx)
+ return -ENOMEM;
+
+ cb_ctx->device = device;
+ cb_ctx->class_port_info = class_port_info;
+ cb_ctx->port_num = port_num;
+ init_completion(&cb_ctx->done);
+
+ ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num,
+ CMA_QUERY_CLASSPORT_INFO_TIMEOUT,
+ GFP_KERNEL, cma_query_sa_classport_info_cb,
+ cb_ctx, &cb_ctx->sa_query);
+ if (ret < 0) {
+ pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
+ device->name, port_num, ret);
+ goto out;
+ }
+
+ wait_for_completion(&cb_ctx->done);
+
+out:
+ kfree(cb_ctx);
+ return ret;
+}
+