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-rw-r--r--drivers/pci/search.c35
1 files changed, 15 insertions, 20 deletions
diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 8541034021f0..1aabe3dbc7c3 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -436,7 +436,18 @@ exit:
436 return dev; 436 return dev;
437} 437}
438 438
439const struct pci_device_id *pci_find_present(const struct pci_device_id *ids) 439/**
440 * pci_dev_present - Returns 1 if device matching the device list is present, 0 if not.
441 * @ids: A pointer to a null terminated list of struct pci_device_id structures
442 * that describe the type of PCI device the caller is trying to find.
443 *
444 * Obvious fact: You do not have a reference to any device that might be found
445 * by this function, so if that device is removed from the system right after
446 * this function is finished, the value will be stale. Use this function to
447 * find devices that are usually built into a system, or for a general hint as
448 * to if another device happens to be present at this specific moment in time.
449 */
450int pci_dev_present(const struct pci_device_id *ids)
440{ 451{
441 struct pci_dev *dev; 452 struct pci_dev *dev;
442 const struct pci_device_id *found = NULL; 453 const struct pci_device_id *found = NULL;
@@ -452,27 +463,11 @@ const struct pci_device_id *pci_find_present(const struct pci_device_id *ids)
452 } 463 }
453exit: 464exit:
454 up_read(&pci_bus_sem); 465 up_read(&pci_bus_sem);
455 return found; 466 if (found)
456} 467 return 1;
457 468 return 0;
458/**
459 * pci_dev_present - Returns 1 if device matching the device list is present, 0 if not.
460 * @ids: A pointer to a null terminated list of struct pci_device_id structures
461 * that describe the type of PCI device the caller is trying to find.
462 *
463 * Obvious fact: You do not have a reference to any device that might be found
464 * by this function, so if that device is removed from the system right after
465 * this function is finished, the value will be stale. Use this function to
466 * find devices that are usually built into a system, or for a general hint as
467 * to if another device happens to be present at this specific moment in time.
468 */
469int pci_dev_present(const struct pci_device_id *ids)
470{
471 return pci_find_present(ids) == NULL ? 0 : 1;
472} 469}
473
474EXPORT_SYMBOL(pci_dev_present); 470EXPORT_SYMBOL(pci_dev_present);
475EXPORT_SYMBOL(pci_find_present);
476 471
477#ifdef CONFIG_PCI_LEGACY 472#ifdef CONFIG_PCI_LEGACY
478EXPORT_SYMBOL(pci_find_device); 473EXPORT_SYMBOL(pci_find_device);