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Message-Id: <c0f1b44f4b1fda35e3e8d2666ba7961571c31980.1525067324.git.jan.kiszka@siemens.com> Date: Mon, 30 Apr 2018 07:48:43 +0200 From: Jan Kiszka <jan.kiszka@...mens.com> To: Bjorn Helgaas <bhelgaas@...gle.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Cc: Will Deacon <will.deacon@....com>, Lorenzo Pieralisi <lorenzo.pieralisi@....com> Subject: [PATCH v2 09/10] PCI: Add support for unbinding the generic PCI host controller From: Jan Kiszka <jan.kiszka@...mens.com> Particularly useful when working in virtual environments where the controller may come and go, but possibly not only there. CC: Will Deacon <will.deacon@....com> CC: Lorenzo Pieralisi <lorenzo.pieralisi@....com> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com> --- 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 -- 2.13.6
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