From patchwork Fri Aug 17 10:26:43 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 10568655 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-2.web.codeaurora.org (Postfix) with ESMTP id 1F89F139B for ; Fri, 17 Aug 2018 10:33:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 101F428812 for ; Fri, 17 Aug 2018 10:33:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 048E428915; Fri, 17 Aug 2018 10:33:06 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable 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 A7A6E28972 for ; Fri, 17 Aug 2018 10:33:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727357AbeHQNf7 (ORCPT ); Fri, 17 Aug 2018 09:35:59 -0400 Received: from mout.kundenserver.de ([217.72.192.73]:53879 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726795AbeHQNfe (ORCPT ); Fri, 17 Aug 2018 09:35:34 -0400 Received: from wuerfel.lan ([109.193.40.16]) by mrelayeu.kundenserver.de (mreue101 [212.227.15.145]) with ESMTPA (Nemesis) id 0LopY3-1gNDhj20RX-00glB0; Fri, 17 Aug 2018 12:27:20 +0200 From: Arnd Bergmann To: linux-pci@vger.kernel.org, Bjorn Helgaas Cc: linux-kernel@vger.kernel.org, Christoph Hellwig , Lorenzo Pieralisi , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, Arnd Bergmann Subject: [RFC 13/15] PCI: turn pcibios_alloc_irq into a callback Date: Fri, 17 Aug 2018 12:26:43 +0200 Message-Id: <20180817102645.3839621-14-arnd@arndb.de> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180817102645.3839621-1-arnd@arndb.de> References: <20180817102645.3839621-1-arnd@arndb.de> X-Provags-ID: V03:K1:vGOxD5cso1fRX7vOFpg6264LHD7qp984mQlv5MPT6s07XrS4K2q Ixzfk8bDO/hDFJUEyLUy4cqBFvWycxqJfqu8myqpu+DeGzm1WHg70Dm0VhCWS3UfXdQMZUh vCVDLDNLy0TIi89lHJhy6GxOzRcS4zgTlQr8KfLRoWv/eaypGIooBRH9J0jTanPDmePlu2G yp3nrpbGuNd8g0mqp4zsg== X-UI-Out-Filterresults: notjunk:1;V01:K0:qiT72hH/I1Q=:9Hqj/v305t7b/4GjgDoN/e Ue8HbedIQ953rUOU4QCIrxtJEmq42LgC1lNOW2wV05FwAP1teCMpuw5EXUnwyVPR5Pst0E2oT yFIfuTQMC0KVvRUuZiHkl2xc8AV844sORxrAHRk2FYS6HDx3zKe98/ZfITQolb0YeyfUWSegv 5kgbJb+UtFGVEoCzgiHqOV1URMwqykKggoFu98N5hGdy4ACiAHfwLtrfjAy3XgMtIp34q95eJ OLTSZTGpJWJCzzZGDuH78sPadMJmvRrWhgD/FQsYl9AZcG5gutbR7vaZK5V7TeNW/hfk/xuuG RoKaH+M4ewI+f7cG9bReKVqfGInD2+FlK4EPmJ8ItQmjzgCNAzALHkB8vlXsXRUVgH2lQ+3dI 03VNLSmbzlhW+aTOur1hTEge9XLP6vHyWg+upyxLGH2zy3BedElcJxWQ1BDWFvux20M1regty +mz5A2Rn/dSr6r2aK2KPpTSr1P8DnlMFYoVGvnDwPULJd89k7o8WU2pnHdzi5deZxVHK//YDJ T7ctzSbG72zxqlW3vMSAAnCsQTbSNWnTU+EfZfiJGEBzfynJhquv+1ZugGcBASOSjn11dcq4C Ih6zebi1/g82y4cGXSIckDdAAjN+79Mv4TOkMu+LqPZnFxUnO4dxJgZtZOe1zrPAncRjTJh8F q3AJPPohH8aOM0jIpA5GNzi4LVgq7xnfVj7gjqc08fgObkjbZr8ajiTOFeLT+ajfY5tE= 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 Weak functions are a bit confusing, and we can better deal with this using a callback function. pcibios_free_irq() is actually completely unused, but it seems better to treat it the same way as the allocation, unless we want to remove it completely. Signed-off-by: Arnd Bergmann --- arch/arm64/kernel/pci.c | 16 +++------------- drivers/pci/pci-driver.c | 13 +++++++++++-- include/linux/pci.h | 2 ++ 3 files changed, 16 insertions(+), 15 deletions(-) diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index 0e2ea1c78542..3d196c68e362 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -22,19 +22,6 @@ #include #include -#ifdef CONFIG_ACPI -/* - * Try to assign the IRQ number when probing a new device - */ -int pcibios_alloc_irq(struct pci_dev *dev) -{ - if (!acpi_disabled) - acpi_pci_irq_enable(dev); - - return 0; -} -#endif - /* * raw_pci_read/write - Platform-specific PCI config space access. */ @@ -93,6 +80,9 @@ int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) ACPI_COMPANION_SET(&bridge->dev, adev); set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev))); + + /* Try to assign the IRQ number when probing a new device */ + bridge->alloc_irq = acpi_pci_irq_enable; } return 0; diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index bef17c3fca67..c96bc7bd56da 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -387,13 +387,22 @@ static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) return error; } -int __weak pcibios_alloc_irq(struct pci_dev *dev) +int pcibios_alloc_irq(struct pci_dev *dev) { + struct pci_host_bridge *bridge = pci_find_host_bridge(dev->bus); + + if (bridge->alloc_irq) + return bridge->alloc_irq(dev); + return 0; } -void __weak pcibios_free_irq(struct pci_dev *dev) +void pcibios_free_irq(struct pci_dev *dev) { + struct pci_host_bridge *bridge = pci_find_host_bridge(dev->bus); + + if (bridge->free_irq) + bridge->free_irq(dev); } #ifdef CONFIG_PCI_IOV diff --git a/include/linux/pci.h b/include/linux/pci.h index d1072690cb4f..1296d9fcc5da 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -476,6 +476,8 @@ struct pci_host_bridge { int (*map_irq)(const struct pci_dev *, u8, u8); void (*release_fn)(struct pci_host_bridge *); void (*bus_add_device)(struct pci_dev *pdev); + int (*alloc_irq)(struct pci_dev *); + int (*free_irq)(struct pci_dev *); void *release_data; struct msi_controller *msi; unsigned int ignore_reset_delay:1; /* For entire hierarchy */