From patchwork Mon Oct 27 07:48:39 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 403401 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 7A5CD140081 for ; Mon, 27 Oct 2014 18:08:15 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751515AbaJ0HIN (ORCPT ); Mon, 27 Oct 2014 03:08:13 -0400 Received: from szxga03-in.huawei.com ([119.145.14.66]:6870 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751308AbaJ0HIN (ORCPT ); Mon, 27 Oct 2014 03:08:13 -0400 Received: from 172.24.2.119 (EHLO szxeml409-hub.china.huawei.com) ([172.24.2.119]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id AWE07461; Mon, 27 Oct 2014 15:07:29 +0800 (CST) Received: from localhost.localdomain (10.175.100.166) by szxeml409-hub.china.huawei.com (10.82.67.136) with Microsoft SMTP Server id 14.3.158.1; Mon, 27 Oct 2014 15:07:20 +0800 From: Yijing Wang To: Bjorn Helgaas CC: , , Xinwei Hu , Wuyun , , Russell King , Thomas Gleixner , "Thierry Reding" , Thomas Petazzoni , Yijing Wang Subject: [PATCH 02/10] PCI/MSI: Introduce weak pcibios_msi_controller() Date: Mon, 27 Oct 2014 15:48:39 +0800 Message-ID: <1414396127-30023-3-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1414396127-30023-1-git-send-email-wangyijing@huawei.com> References: <1414396127-30023-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.100.166] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A02020A.544DEF31.0189, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 3ff181c1f0d39fd0d459c802015e7d48 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Introduce a new weak pcibios_msi_controller() to get the associate msi_chip for PCI bus. This is preparation for save msi_chip in arch PCI sysdata. This weak function will be removed after we save msi_chip in generic pci_host_bridge. Suggested-by: Bjorn Helgaas Signed-off-by: Yijing Wang --- drivers/pci/msi.c | 19 +++++++++++++++++-- 1 files changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 1c7ca4a..f085f7f 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -30,9 +30,24 @@ int pci_msi_ignore_mask; /* Arch hooks */ +struct msi_controller * __weak pcibios_msi_controller(struct pci_bus *bus) +{ + return NULL; +} + +struct msi_controller *pci_msi_controller(struct pci_bus *bus) +{ + struct msi_controller *ctrl = bus->msi; + + if (ctrl) + return ctrl; + + return pcibios_msi_controller(bus); +} + int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) { - struct msi_controller *ctrl = dev->bus->msi; + struct msi_controller *ctrl = pci_msi_controller(dev->bus); int err; if (!ctrl || !ctrl->setup_irq) @@ -48,7 +63,7 @@ int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) void __weak arch_teardown_msi_irq(unsigned int irq) { struct msi_desc *entry = irq_get_msi_desc(irq); - struct msi_controller *ctrl = entry->dev->bus->msi; + struct msi_controller *ctrl = pci_msi_controller(entry->dev->bus); if (!ctrl || !ctrl->teardown_irq) return;