pci_get_subsys — begin or continue searching for a PCI device by vendor/subvendor/device/subdevice id
struct pci_dev * pci_get_subsys ( | unsigned int | vendor, |
| unsigned int | device, | |
| unsigned int | ss_vendor, | |
| unsigned int | ss_device, | |
| const struct pci_dev * | from); |
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.
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.