PCI: Add pci_ops.{add,remove}_bus() callbacks
Add pci_ops.{add,remove}_bus() callbacks, which will be called on every newly created bus and when a bus is being removed, respectively. This can be used by drivers to implement driver-specific initialization and teardown of the bus, in addition to the architecture-specifics implemented by the pcibios_add_bus() and the pcibios_remove_bus() functions. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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@ -758,6 +758,12 @@ add_dev:
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pcibios_add_bus(child);
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if (child->ops->add_bus) {
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ret = child->ops->add_bus(child);
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if (WARN_ON(ret < 0))
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dev_err(&child->dev, "failed to add bus: %d\n", ret);
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}
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/* Create legacy_io and legacy_mem files for this bus */
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pci_create_legacy_files(child);
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@ -54,6 +54,10 @@ void pci_remove_bus(struct pci_bus *bus)
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pci_bus_release_busn_res(bus);
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up_write(&pci_bus_sem);
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pci_remove_legacy_files(bus);
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if (bus->ops->remove_bus)
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bus->ops->remove_bus(bus);
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pcibios_remove_bus(bus);
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device_unregister(&bus->dev);
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}
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@ -578,6 +578,8 @@ static inline int pcibios_err_to_errno(int err)
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/* Low-level architecture-dependent routines */
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struct pci_ops {
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int (*add_bus)(struct pci_bus *bus);
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void (*remove_bus)(struct pci_bus *bus);
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void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
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int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
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int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
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