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Commit a72b46c3 authored by Huang Ying's avatar Huang Ying Committed by Jesse Barnes
Browse files

PCI: Add pci_bus_set_ops 



pci_bus_set_ops changes pci_ops associated with a pci_bus. This can be
used by debug tools such as PCIE AER error injection to fake some PCI
configuration registers.

Acked-by: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent 1eb39487

drivers/pci/access.c

+19 −0
Original line number Diff line number Diff line
@@ -66,6 +66,25 @@ EXPORT_SYMBOL(pci_bus_write_config_byte); 
EXPORT_SYMBOL(pci_bus_write_config_word);

EXPORT_SYMBOL(pci_bus_write_config_dword);



/**

 * pci_bus_set_ops - Set raw operations of pci bus

 * @bus:	pci bus struct

 * @ops:	new raw operations

 *

 * Return previous raw operations

 */

struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops)

{

	struct pci_ops *old_ops;

	unsigned long flags;



	spin_lock_irqsave(&pci_lock, flags);

	old_ops = bus->ops;

	bus->ops = ops;

	spin_unlock_irqrestore(&pci_lock, flags);

	return old_ops;

}

EXPORT_SYMBOL(pci_bus_set_ops);



/**

 * pci_read_vpd - Read one entry from Vital Product Data

include/linux/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -637,6 +637,7 @@ int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, 
			      int where, u16 val);

int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,

			       int where, u32 val);

struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);



static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)

{