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PCI: Add pci_ops.{add,remove}_bus() callbacks

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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 <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
This commit is contained in:
Thierry Reding 2016-02-09 15:30:47 +01:00 • committed by Bjorn Helgaas
commit 057bd2e052
3 changed files with 12 additions and 0 deletions
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6
drivers/pci/probe.c
View file

@ -758,6 +758,12 @@ add_dev:
pcibios_add_bus(child);
if (child->ops->add_bus) {
ret = child->ops->add_bus(child);
if (WARN_ON(ret < 0))
dev_err(&child->dev, "failed to add bus: %d\n", ret);
}
/* Create legacy_io and legacy_mem files for this bus */
pci_create_legacy_files(child);

4
drivers/pci/remove.c
View file

@ -54,6 +54,10 @@ void pci_remove_bus(struct pci_bus *bus)
pci_bus_release_busn_res(bus);
up_write(&pci_bus_sem);
pci_remove_legacy_files(bus);
if (bus->ops->remove_bus)
bus->ops->remove_bus(bus);
pcibios_remove_bus(bus);
device_unregister(&bus->dev);
}