> +struct device * bus_find_device(struct bus_type * bus, struct device * start,
> + void * data, int (*match)(struct device *, void *))
> +{
> + struct klist_iter i;
> + struct device * dev;
> +
> + if (!bus)
> + return NULL;
> +
> + klist_iter_init_node(&bus->klist_devices, &i,
> + (start ? &start->knode_bus : NULL));
> + while ((dev = next_device(&i)))
> + if (match(dev, data))
> + break;
> + klist_iter_exit(&i);
> + return dev;
does the klist magic somehow grab a reference for you?
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