CLASS_FOR_EACH_DEVIC(9)           Device drivers infrastructure           CLASS_FOR_EACH_DEVIC(9)



NAME
       class_for_each_device - device iterator

SYNOPSIS
       int class_for_each_device(struct class * class, struct device * start, void * data,
                                 int (*fn) (struct device *, void *));

ARGUMENTS
       class
           the class we're iterating

       start
           the device to start with in the list, if any.

       data
           data for the callback

       fn
           function to be called for each device

DESCRIPTION
       Iterate over class's list of devices, and call fn for each, passing it data. If start is
       set, the list iteration will start there, otherwise if it is NULL, the iteration starts at
       the beginning of the list.

       We check the return of fn each time. If it returns anything other than 0, we break out and
       return that value.

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

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   CLASS_FOR_EACH_DEVIC(9)