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authorAndrew Patterson <andrew.patterson@hp.com>2009-10-12 13:14:00 -0600
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-11-04 13:06:36 -0800
commit3c299dc22635e500214707aa28be119ff2b3901c (patch)
tree6d9cb3710c674639041ead3247e179fa82dcaf35 /drivers/pci/search.c
parentbc577d2bb98cc44371287fce3e892d26ad4050a8 (diff)
PCI: add pci_get_domain_bus_and_slot function
Added the pci_get_domain_and_slot_function which is analogous to pci_get_bus_and_slot. It returns a pci_dev given a domain (segment) number, bus number, and devnr. Like pci_get_bus_and_slot, pci_get_domain_bus_and_slot holds a reference to the returned pci_dev. Converted pci_get_bus_and_slot to a wrapper that calls pci_get_domain_bus_and_slot with the domain hard-coded to 0. This routine was patterned off code suggested by Bjorn Helgaas. Acked-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/search.c')
-rw-r--r--drivers/pci/search.c34
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index ec415352d9b..75826482c71 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -149,32 +149,33 @@ struct pci_dev * pci_get_slot(struct pci_bus *bus, unsigned int devfn)
}
/**
- * pci_get_bus_and_slot - locate PCI device from a given PCI bus & slot
- * @bus: number of PCI bus on which desired PCI device resides
- * @devfn: encodes number of PCI slot in which the desired PCI
- * device resides and the logical device number within that slot
- * in case of multi-function devices.
- *
- * Note: the bus/slot search is limited to PCI domain (segment) 0.
+ * pci_get_domain_bus_and_slot - locate PCI device for a given PCI domain (segment), bus, and slot
+ * @domain: PCI domain/segment on which the PCI device resides.
+ * @bus: PCI bus on which desired PCI device resides
+ * @devfn: encodes number of PCI slot in which the desired PCI device
+ * resides and the logical device number within that slot in case of
+ * multi-function devices.
*
- * Given a PCI bus and slot/function number, the desired PCI device
- * is located in system global list of PCI devices. If the device
- * is found, a pointer to its data structure is returned. If no
- * device is found, %NULL is returned. The returned device has its
- * reference count bumped by one.
+ * Given a PCI domain, bus, and slot/function number, the desired PCI
+ * device is located in the list of PCI devices. If the device is
+ * found, its reference count is increased and this function returns a
+ * pointer to its data structure. The caller must decrement the
+ * reference count by calling pci_dev_put(). If no device is found,
+ * %NULL is returned.
*/
-
-struct pci_dev * pci_get_bus_and_slot(unsigned int bus, unsigned int devfn)
+struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
+ unsigned int devfn)
{
struct pci_dev *dev = NULL;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- if (pci_domain_nr(dev->bus) == 0 &&
- (dev->bus->number == bus && dev->devfn == devfn))
+ if (pci_domain_nr(dev->bus) == domain &&
+ (dev->bus->number == bus && dev->devfn == devfn))
return dev;
}
return NULL;
}
+EXPORT_SYMBOL(pci_get_domain_bus_and_slot);
static int match_pci_dev_by_id(struct device *dev, void *data)
{
@@ -354,5 +355,4 @@ EXPORT_SYMBOL(pci_find_next_bus);
EXPORT_SYMBOL(pci_get_device);
EXPORT_SYMBOL(pci_get_subsys);
EXPORT_SYMBOL(pci_get_slot);
-EXPORT_SYMBOL(pci_get_bus_and_slot);
EXPORT_SYMBOL(pci_get_class);