source: rtems/cpukit/libpci/pci_for_each_child.c @ a31845f7

/*  PCI Help function, iterate all PCI device children of PCI bus.
 *
 *  COPYRIGHT (c) 2010.
 *  Cobham Gaisler AB.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 */

#include <pci/cfg.h>

/* Iterate over all PCI devices on a bus (not child buses) and call func(),
 * iteration is stopped if a non-zero value is returned by func().
 *
 * search options: 0 (no child buses), 1 (depth first), 2 (breadth first)
 */
int pci_for_each_child(
        struct pci_bus *bus,
        int (*func)(struct pci_dev *, void *arg),
        void *arg,
        int search)
{
        struct pci_dev *dev = bus->devs;
        int ret;

        while (dev) {
                ret = func(dev, arg);
                if (ret)
                        return ret;
                if (search == SEARCH_DEPTH && (dev->flags & PCI_DEV_BRIDGE)) {
                        ret = pci_for_each_child((struct pci_bus *)dev,
                                                        func, arg, search);
                        if (ret)
                                return ret;
                }
                dev = dev->next;
        }

        return 0;
}