From patchwork Mon Nov 1 18:02:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tim Harvey X-Patchwork-Id: 12596981 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 AE5A1C433FE for ; Mon, 1 Nov 2021 18:37:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9194160462 for ; Mon, 1 Nov 2021 18:37:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231776AbhKASjz (ORCPT ); Mon, 1 Nov 2021 14:39:55 -0400 Received: from finn.gateworks.com ([108.161.129.64]:59064 "EHLO finn.localdomain" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232191AbhKASjs (ORCPT ); Mon, 1 Nov 2021 14:39:48 -0400 X-Greylist: delayed 1791 seconds by postgrey-1.27 at vger.kernel.org; Mon, 01 Nov 2021 14:39:48 EDT Received: from 068-189-091-139.biz.spectrum.com ([68.189.91.139] helo=tharvey.pdc.gateworks.com) by finn.localdomain with esmtp (Exim 4.93) (envelope-from ) id 1mhbdt-007rRg-E2; Mon, 01 Nov 2021 18:02:45 +0000 From: Tim Harvey To: Jingoo Han , Gustavo Pimentel , Rob Herring , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , linux-pci@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Tim Harvey , Richard Zhu Subject: [PATCH] PCI: imx: do not remap invalid res Date: Mon, 1 Nov 2021 11:02:43 -0700 Message-Id: <20211101180243.23761-1-tharvey@gateworks.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On imx6 and perhaps others when pcie probes you get a: imx6q-pcie 33800000.pcie: invalid resource This occurs because the atu is not specified in the DT and as such it should not be remapped. Cc: Richard Zhu Signed-off-by: Tim Harvey Reviewed-by: Rob Herring --- drivers/pci/controller/dwc/pcie-designware.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index a945f0c0e73d..3254f60d1713 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -671,10 +671,11 @@ void dw_pcie_iatu_detect(struct dw_pcie *pci) if (!pci->atu_base) { struct resource *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "atu"); - if (res) + if (res) { pci->atu_size = resource_size(res); - pci->atu_base = devm_ioremap_resource(dev, res); - if (IS_ERR(pci->atu_base)) + pci->atu_base = devm_ioremap_resource(dev, res); + } + if (!pci->atu_base || IS_ERR(pci->atu_base)) pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; }