pci_get_class — begin or continue searching for a PCI device by class
struct pci_dev * pci_get_class ( | unsigned int | class, |
| struct pci_dev * | from); |
classsearch for a PCI device with this class designation
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 class, the reference count to the device is
incremented and a pointer to its device structure is returned.
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.