centos man page for pci_get_subsys

PCI_GET_SUBSYS(9)						Hardware Interfaces						 PCI_GET_SUBSYS(9)

NAME
       pci_get_subsys - begin or continue searching for a PCI device by vendor/subvendor/device/subdevice id

SYNOPSIS
       struct pci_dev * pci_get_subsys(unsigned int vendor, unsigned int device, unsigned int ss_vendor, unsigned int ss_device,
				       struct pci_dev * from);

ARGUMENTS
       vendor
	   PCI vendor id to match, or PCI_ANY_ID to match all vendor ids

       device
	   PCI device id to match, or PCI_ANY_ID to match all device ids

       ss_vendor
	   PCI subsystem vendor id to match, or PCI_ANY_ID to match all vendor ids

       ss_device
	   PCI subsystem device id to match, or PCI_ANY_ID to match all device ids

       from
	   Previous PCI device found in search, or NULL for new search.

DESCRIPTION
       Iterates through the list of known PCI devices. If a PCI device is found with a matching vendor, device, ss_vendor and ss_device, a pointer
       to its device structure is returned, and the reference count to the device is incremented. Otherwise, NULL is returned. A new search is
       initiated by passing NULL as the from argument. Otherwise if from is not NULL, searches continue from next device on the global list. The
       reference count for from is always decremented if it is not NULL.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							 PCI_GET_SUBSYS(9)