- struct device * class_find_device(struct class * class, struct device * start, const void * data, int (*match) (struct device *, const void *));
- the class we're iterating
- Device to begin with
- data for the match function
- function to check device
This is similar to the class_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.
Note, you will need to drop the reference with put_device after use.
fn is allowed to do anything including calling back into class code. There's no locking restriction.