From patchwork Sat Oct 16 05:15:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Widawsky X-Patchwork-Id: 12563209 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 620EBC433EF for ; Sat, 16 Oct 2021 05:15:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 443EF61252 for ; Sat, 16 Oct 2021 05:15:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243685AbhJPFRv (ORCPT ); Sat, 16 Oct 2021 01:17:51 -0400 Received: from mga11.intel.com ([192.55.52.93]:1745 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243689AbhJPFRt (ORCPT ); Sat, 16 Oct 2021 01:17:49 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10138"; a="225489609" X-IronPort-AV: E=Sophos;i="5.85,377,1624345200"; d="scan'208";a="225489609" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2021 22:15:42 -0700 X-IronPort-AV: E=Sophos;i="5.85,377,1624345200"; d="scan'208";a="442743291" Received: from asimon-mobl1.amr.corp.intel.com (HELO bad-guy.kumite) ([10.252.133.4]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2021 22:15:42 -0700 From: Ben Widawsky To: linux-cxl@vger.kernel.org, Chet Douglas Cc: Ben Widawsky , Alison Schofield , Dan Williams , Ira Weiny , Jonathan Cameron , Vishal Verma Subject: [RFC PATCH 15/27] cxl: Disable switch hierarchies for now Date: Fri, 15 Oct 2021 22:15:19 -0700 Message-Id: <20211016051531.622613-16-ben.widawsky@intel.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211016051531.622613-1-ben.widawsky@intel.com> References: <20211016051531.622613-1-ben.widawsky@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Switches aren't supported by the region driver yet. If a device finds itself under a switch it will not bind a driver so that it cannot be used later for region creation/configuration. Signed-off-by: Ben Widawsky --- drivers/cxl/mem.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c index 60fadf5a0262..fb0b3cb10482 100644 --- a/drivers/cxl/mem.c +++ b/drivers/cxl/mem.c @@ -118,6 +118,11 @@ static int cxl_mem_probe(struct device *dev) goto out; } + /* FIXME: Add true switch support */ + dev_err(dev, "Devices behind switches are currently unsupported\n"); + rc = -ENODEV; + goto err_out; + /* Walk down from the root port and add all switches */ cxl_scan_ports(ctx.root_port);