CLASS_FIND_DEVICE(9) Device drivers infrastructure CLASS_FIND_DEVICE(9)NAMEclass_find_device - device iterator for locating a particular device
struct device * class_find_device(struct class * class,
struct device * start, void * data,
int (*match) (struct device *, 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.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 CLASS_FIND_DEVICE(9)