struct device * bus_find_device (struct bus_type * bus, struct device * start, void * data, int (*match) struct device *, void *);
This is similar to the bus_for_each_dev function above, but it returns a reference to a device that is 'found' for later use, as determined by the match callback.
The callback should return 0 if the device doesn't match and non-zero if it does. If the callback returns non-zero, this function will return to the caller and not iterate over any more devices.