Function rt_pci_enum_device

components/drivers/pci/pci.c:733–859

}

void rt_pci_enum_device(struct rt_pci_bus *bus,
        rt_bool_t (callback(struct rt_pci_device *, void *)), void *data)
{
    rt_bool_t is_end = RT_FALSE;
    struct rt_spinlock *lock;
    struct rt_pci_bus *parent;
    struct rt_pci_device *pdev, *last_pdev = RT_NULL;

    /* Walk tree */
    while (bus && !is_end)
    {
        /* Goto bottom */
        for (;;)
        {
            lock = &bus->lock;

            spin_lock(lock);
            if (rt_list_isempty(&bus->children_nodes))
            {
                parent = bus->parent;
                break;
            }
            bus = rt_list_entry(&bus->children_nodes, struct rt_pci_bus, list);
            spin_unlock(lock);
        }

        rt_list_for_each_entry(pdev, &bus->devices_nodes, list)
        {
            if (last_pdev)
            {
                spin_unlock(lock);

                if (callback(last_pdev, data))
                {
                    spin_lock(lock);
                    --last_pdev->parent.ref_count;

                    is_end = RT_TRUE;
                    break;
                }

                spin_lock(lock);
                --last_pdev->parent.ref_count;
            }
            ++pdev->parent.ref_count;
            last_pdev = pdev;
        }

        if (!is_end && last_pdev)
        {
            spin_unlock(lock);

            if (callback(last_pdev, data))
            {
                is_end = RT_TRUE;
            }

            spin_lock(lock);