class_find_device
Prev Device Drivers Base Next

Name

class_find_device — device iterator for locating a particular device

Synopsis

struct device * class_find_device (struct class * class,
 struct device * start,
 const void * data,
 int (*match) (struct device *, const 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.

match is allowed to do anything including calling back into class code. There's no locking restriction.

Prev Up Next
class_for_each_device Home class_compat_register