From a72b46c3849cdb05993015991bde548ab8b6d7ac Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Fri, 24 Apr 2009 10:45:17 +0800 Subject: 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: Kenji Kaneshige Signed-off-by: Huang Ying Signed-off-by: Jesse Barnes --- drivers/pci/access.c | 19 +++++++++++++++++++ include/linux/pci.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 0f37065..db23200 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -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 diff --git a/include/linux/pci.h b/include/linux/pci.h index ec03b90..ea2a153 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -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) { -- cgit v1.1