diff options
| author | Huang Ying <ying.huang@intel.com> | 2009-04-24 04:45:17 +0200 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-06-16 23:29:33 +0200 |
| commit | a72b46c3849cdb05993015991bde548ab8b6d7ac (patch) | |
| tree | a782d4ab9c217792c9a8cefe48db9aebc0734dbe | |
| parent | PCI: use pci_is_root_bus() in pci_common_swizzle() (diff) | |
| download | linux-a72b46c3849cdb05993015991bde548ab8b6d7ac.tar.xz linux-a72b46c3849cdb05993015991bde548ab8b6d7ac.zip | |
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 <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | drivers/pci/access.c | 19 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 0f3706512686..db23200c4874 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 ec03b90d3510..ea2a153a9126 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) { |