From patchwork Mon Apr 30 05:48:43 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kiszka X-Patchwork-Id: 10370847 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 8473660384 for ; Mon, 30 Apr 2018 05:54:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 70FEE28A14 for ; Mon, 30 Apr 2018 05:54:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6288F28A35; Mon, 30 Apr 2018 05:54:52 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9B396283E7 for ; Mon, 30 Apr 2018 05:54:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=cf18c0DHJw4P0IotGtQ7JtVBrFnYVcLJ5+AAbmSVUyE=; b=lRUhlUW6q2Sr0FvASFstc9VNTk ub5tnGUrQVWJsLE7kMbNH6TYU771kooTMPOjq8ktdmfKdo1UEHluw2oG4xfDOE3p+L5/IaI4Trfvh OgCdDjLhYizt3cV/w1yQYjfNLIIbn2puLKRM18pudP96yJY5Crd0G4urNSi4D75EYTG/S5a+hiCJU 5W8ZAISz+GuUgMOulCW24ZNgmNNx0HylH4fn2DdZctmTm3hG64IMHfhXWUj1fd6RVQT/2+G5xpej8 YwhoPI5EKtF1zZRC//pu6SyjpYW5wEBdGrBkC4Ph1grxHqfnArz3h3ti++ZakvP+/Ar4g6P9byU1s Y6t3QSRg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fD1ls-0006Iu-VN; Mon, 30 Apr 2018 05:54:44 +0000 Received: from thoth.sbs.de ([192.35.17.2]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fD1gP-0002jD-BH for linux-arm-kernel@lists.infradead.org; Mon, 30 Apr 2018 05:49:14 +0000 Received: from mail3.siemens.de (mail3.siemens.de [139.25.208.14]) by thoth.sbs.de (8.15.2/8.15.2) with ESMTPS id w3U5mneq012500 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 30 Apr 2018 07:48:49 +0200 Received: from md1f2u6c.ww002.siemens.net ([167.87.54.87]) by mail3.siemens.de (8.15.2/8.15.2) with ESMTP id w3U5mj71003250; Mon, 30 Apr 2018 07:48:48 +0200 From: Jan Kiszka To: Bjorn Helgaas , Linux Kernel Mailing List , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 09/10] PCI: Add support for unbinding the generic PCI host controller Date: Mon, 30 Apr 2018 07:48:43 +0200 Message-Id: X-Mailer: git-send-email 2.13.6 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180429_224905_826879_DA29F1AE X-CRM114-Status: GOOD ( 12.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , Will Deacon MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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