drivers/pci/legacy.c

   1 #include <linux/init.h>
   2 #include <linux/pci.h>
   3 #include <linux/module.h>
   4 #include <linux/interrupt.h>
   5 #include "pci.h"
   6
   7 /**
   8  * pci_find_device - begin or continue searching for a PCI device by vendor/device id
   9  * @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
  10  * @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
  11  * @from: Previous PCI device found in search, or %NULL for new search.
  12  *
  13  * Iterates through the list of known PCI devices.  If a PCI device is found
  14  * with a matching @vendor and @device, a pointer to its device structure is
  15  * returned.  Otherwise, %NULL is returned.
  16  * A new search is initiated by passing %NULL as the @from argument.
  17  * Otherwise if @from is not %NULL, searches continue from next device
  18  * on the global list.
  19  *
  20  * NOTE: Do not use this function any more; use pci_get_device() instead, as
  21  * the PCI device returned by this function can disappear at any moment in
  22  * time.
  23  */
  24 struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device,
  25                                 struct pci_dev *from)
  26 {
  27         struct pci_dev *pdev;
  28
  29         pci_dev_get(from);
  30         pdev = pci_get_subsys(vendor, device, PCI_ANY_ID, PCI_ANY_ID, from);
  31         pci_dev_put(pdev);
  32         return pdev;
  33 }
  34 EXPORT_SYMBOL(pci_find_device);