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PCI: Add support for unbinding the generic PCI host controller 

Add support for unbinding the generic PCI host controller.  This is
particularly useful when working in virtual environments where the
controller may come and go, but possibly not only there.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Will Deacon <will.deacon@arm.com>
CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Jan Kiszka 2018-05-15 11:07:06 +02:00 committed by Bjorn Helgaas
parent 5bd51b35c7
commit 01fcb7f777
3 changed files with 15 additions and 0 deletions
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13
drivers/pci/host/pci-host-common.c
View File

@ -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;
}

1
drivers/pci/host/pci-host-generic.c
View File

@ -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);

1
include/linux/pci-ecam.h
View File

@ -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