centos man page for pci_get_slot

PCI_GET_SLOT(9) 						Hardware Interfaces						   PCI_GET_SLOT(9)

NAME
       pci_get_slot - locate PCI device for a given PCI slot

SYNOPSIS
       struct pci_dev * pci_get_slot(struct pci_bus * bus, unsigned int devfn);

ARGUMENTS
       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.

DESCRIPTION
       Given a PCI 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.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   PCI_GET_SLOT(9)