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Commit de5a28ac authored by Gavin Shan's avatar Gavin Shan Committed by Michael Ellerman
Browse files

powerpc/pci: Introduce pci_remove_device_node_info() 



This implements and exports pci_remove_device_node_info(). It's
used to remove the pdn (struct pci_dn) for the indicated device
node. The function is going to be used by PowerNV PCI hotplug
driver.

Signed-off-by: default avatarGavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent d8f66f41

arch/powerpc/include/asm/pci-bridge.h

+1 −0
Original line number Diff line number Diff line
@@ -237,6 +237,7 @@ extern struct pci_dn *add_dev_pci_data(struct pci_dev *pdev); 
extern void remove_dev_pci_data(struct pci_dev *pdev);

extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,

					       struct device_node *dn);

extern void pci_remove_device_node_info(struct device_node *dn);



static inline int pci_device_from_OF_node(struct device_node *np,

					  u8 *bus, u8 *devfn)

arch/powerpc/kernel/pci_dn.c

+23 −0
Original line number Diff line number Diff line
@@ -331,6 +331,29 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, 
}

EXPORT_SYMBOL_GPL(pci_add_device_node_info);



void pci_remove_device_node_info(struct device_node *dn)

{

	struct pci_dn *pdn = dn ? PCI_DN(dn) : NULL;

#ifdef CONFIG_EEH

	struct eeh_dev *edev = pdn_to_eeh_dev(pdn);



	if (edev)

		edev->pdn = NULL;

#endif



	if (!pdn)

		return;



	WARN_ON(!list_empty(&pdn->child_list));

	list_del(&pdn->list);

	if (pdn->parent)

		of_node_put(pdn->parent->node);



	dn->data = NULL;

	kfree(pdn);

}

EXPORT_SYMBOL_GPL(pci_remove_device_node_info);



/*

 * Traverse a device tree stopping each PCI device in the tree.

 * This is done depth first.  As each node is processed, a "pre"