From patchwork Mon Dec 4 15:09:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 10090625 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F396A60580 for ; Mon, 4 Dec 2017 15:09:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EF8B028E29 for ; Mon, 4 Dec 2017 15:09:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E42D529045; Mon, 4 Dec 2017 15:09:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F11C28E29 for ; Mon, 4 Dec 2017 15:09:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754092AbdLDPJo (ORCPT ); Mon, 4 Dec 2017 10:09:44 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:56468 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754055AbdLDPJo (ORCPT ); Mon, 4 Dec 2017 10:09:44 -0500 Received: by mail.free-electrons.com (Postfix, from userid 110) id 4869F2081A; Mon, 4 Dec 2017 16:09:42 +0100 (CET) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id EF4542073B; Mon, 4 Dec 2017 16:09:22 +0100 (CET) From: Thomas Petazzoni To: Yoshinori Sato , Rich Felker , Bjorn Helgaas , Lorenzo Pieralisi Cc: linux-sh@vger.kernel.org, linux-pci@vger.kernel.org, Geert Uytterhoeven , Thomas Petazzoni Subject: [PATCH 3/8] arch/sh: pci: don't use disabled resources Date: Mon, 4 Dec 2017 16:09:02 +0100 Message-Id: <20171204150907.24345-4-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20171204150907.24345-1-thomas.petazzoni@free-electrons.com> References: <20171204150907.24345-1-thomas.petazzoni@free-electrons.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In pcibios_scanbus(), we provide to the PCI core the usable MEM and IO regions using pci_add_resource_offset(). We travel through all resources available in the "struct pci_channel". Also, in register_pci_controller(), we travel through all resources to request them, making sure they don't conflict with already requested resources. However, some resources may be disabled, in which case they should not be requested nor provided to the PCI core. In the current situation, none of the resources are disabled. However, follow-up patches in this series will make some resources disabled, making this preliminary change necessary. Signed-off-by: Thomas Petazzoni --- arch/sh/drivers/pci/pci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c index 5976a2c8a3e3..e5b7437ab4af 100644 --- a/arch/sh/drivers/pci/pci.c +++ b/arch/sh/drivers/pci/pci.c @@ -49,6 +49,8 @@ static void pcibios_scanbus(struct pci_channel *hose) for (i = 0; i < hose->nr_resources; i++) { res = hose->resources + i; offset = 0; + if (res->flags & IORESOURCE_DISABLED) + continue; if (res->flags & IORESOURCE_IO) offset = hose->io_offset; else if (res->flags & IORESOURCE_MEM) @@ -102,6 +104,9 @@ int register_pci_controller(struct pci_channel *hose) for (i = 0; i < hose->nr_resources; i++) { struct resource *res = hose->resources + i; + if (res->flags & IORESOURCE_DISABLED) + continue; + if (res->flags & IORESOURCE_IO) { if (request_resource(&ioport_resource, res) < 0) goto out;