CLASS_FIND_DEVICE(9) Device drivers infrastructure CLASS_FIND_DEVICE(9)
NAME class_find_device - device iterator for locating a particular device
SYNOPSIS struct device * class_find_device(struct class * class, struct device * start, void * data, int (*match) (struct device *, void *));
ARGUMENTS class the class we´re iterating
start Device to begin with
data data for the match function
match function to check device
DESCRIPTION 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.
COPYRIGHT Kernel Hackers Manual 2.6. April 2016 CLASS_FIND_DEVICE(9)