pci_get_domain_bus_and_slot — locate PCI device for a given PCI domain (segment), bus, and slot
|unsigned int bus,|
|unsigned int devfn|
PCI domain/segment on which the PCI device resides.
unsigned int bus
PCI bus on which desired PCI device resides
unsigned int 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 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.