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Commit cdfcc572 authored by Yinghai Lu's avatar Yinghai Lu Committed by Bjorn Helgaas
Browse files

PCI: Add pci_stop_and_remove_root_bus() 



It supports both PCI root bus and PCI bus under PCI bridge.

Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 62a08c5a

drivers/pci/remove.c

+36 −0
Original line number Diff line number Diff line
@@ -111,3 +111,39 @@ void pci_stop_and_remove_bus_device(struct pci_dev *dev) 
	pci_remove_bus_device(dev);

}

EXPORT_SYMBOL(pci_stop_and_remove_bus_device);



void pci_stop_root_bus(struct pci_bus *bus)

{

	struct pci_dev *child, *tmp;

	struct pci_host_bridge *host_bridge;



	if (!pci_is_root_bus(bus))

		return;



	host_bridge = to_pci_host_bridge(bus->bridge);

	list_for_each_entry_safe_reverse(child, tmp,

					 &bus->devices, bus_list)

		pci_stop_bus_device(child);



	/* stop the host bridge */

	device_del(&host_bridge->dev);

}



void pci_remove_root_bus(struct pci_bus *bus)

{

	struct pci_dev *child, *tmp;

	struct pci_host_bridge *host_bridge;



	if (!pci_is_root_bus(bus))

		return;



	host_bridge = to_pci_host_bridge(bus->bridge);

	list_for_each_entry_safe(child, tmp,

				 &bus->devices, bus_list)

		pci_remove_bus_device(child);

	pci_remove_bus(bus);

	host_bridge->bus = NULL;



	/* remove the host bridge */

	put_device(&host_bridge->dev);

}

include/linux/pci.h

+2 −0
Original line number Diff line number Diff line
@@ -712,6 +712,8 @@ extern struct pci_dev *pci_dev_get(struct pci_dev *dev); 
extern void pci_dev_put(struct pci_dev *dev);

extern void pci_remove_bus(struct pci_bus *b);

extern void pci_stop_and_remove_bus_device(struct pci_dev *dev);

void pci_stop_root_bus(struct pci_bus *bus);

void pci_remove_root_bus(struct pci_bus *bus);

void pci_setup_cardbus(struct pci_bus *bus);

extern void pci_sort_breadthfirst(void);

#define dev_is_pci(d) ((d)->bus == &pci_bus_type)