From patchwork Tue Apr 24 15:13:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kiszka X-Patchwork-Id: 10360245 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 F09A0601D3 for ; Tue, 24 Apr 2018 15:28:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E251E28E4A for ; Tue, 24 Apr 2018 15:28:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D716828E4E; Tue, 24 Apr 2018 15:28:19 +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=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 C9A0F28E4A for ; Tue, 24 Apr 2018 15:28:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751389AbeDXP2R (ORCPT ); Tue, 24 Apr 2018 11:28:17 -0400 Received: from david.siemens.de ([192.35.17.14]:41462 "EHLO david.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231AbeDXP2Q (ORCPT ); Tue, 24 Apr 2018 11:28:16 -0400 X-Greylist: delayed 409 seconds by postgrey-1.27 at vger.kernel.org; Tue, 24 Apr 2018 11:28:16 EDT Received: from mail2.siemens.de (mail2.siemens.de [139.25.208.11]) by david.siemens.de (8.15.2/8.15.2) with ESMTPS id w3OFDijx023442 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 24 Apr 2018 17:13:45 +0200 Received: from md1f2u6c.ad001.siemens.net (md1q0hnc.ad001.siemens.net [139.25.68.37] (may be forged)) by mail2.siemens.de (8.15.2/8.15.2) with ESMTP id w3OFDhen031216; Tue, 24 Apr 2018 17:13:44 +0200 From: Jan Kiszka To: Bjorn Helgaas , Linux Kernel Mailing List , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Will Deacon , Lorenzo Pieralisi Subject: [PATCH 5/6] PCI: Add support for unbinding the generic PCI host controller Date: Tue, 24 Apr 2018 17:13:41 +0200 Message-Id: X-Mailer: git-send-email 2.13.6 In-Reply-To: References: In-Reply-To: References: 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 From: Jan Kiszka Particularly useful when working in virtual environments where the controller may come and go, but possibly not only there. CC: Will Deacon CC: Lorenzo Pieralisi Signed-off-by: Jan Kiszka --- drivers/pci/host/pci-host-common.c | 13 +++++++++++++ drivers/pci/host/pci-host-generic.c | 1 + include/linux/pci-ecam.h | 1 + 3 files changed, 15 insertions(+) diff --git a/drivers/pci/host/pci-host-common.c b/drivers/pci/host/pci-host-common.c index 5d028f53fdcd..d8f10451f273 100644 --- a/drivers/pci/host/pci-host-common.c +++ b/drivers/pci/host/pci-host-common.c @@ -101,5 +101,18 @@ int pci_host_common_probe(struct platform_device *pdev, return ret; } + platform_set_drvdata(pdev, bridge->bus); + return 0; +} + +int pci_host_common_remove(struct platform_device *pdev) +{ + struct pci_bus *bus = platform_get_drvdata(pdev); + + pci_lock_rescan_remove(); + pci_stop_root_bus(bus); + pci_remove_root_bus(bus); + pci_unlock_rescan_remove(); + return 0; } diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c index 45319ee3b484..dea3ec7592a2 100644 --- a/drivers/pci/host/pci-host-generic.c +++ b/drivers/pci/host/pci-host-generic.c @@ -95,5 +95,6 @@ static struct platform_driver gen_pci_driver = { .suppress_bind_attrs = true, }, .probe = gen_pci_probe, + .remove = pci_host_common_remove, }; builtin_platform_driver(gen_pci_driver); diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h index baadad1aabbc..29efa09d686b 100644 --- a/include/linux/pci-ecam.h +++ b/include/linux/pci-ecam.h @@ -62,5 +62,6 @@ extern struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */ /* for DT-based PCI controllers that support ECAM */ int pci_host_common_probe(struct platform_device *pdev, struct pci_ecam_ops *ops); +int pci_host_common_remove(struct platform_device *pdev); #endif #endif