class_for_each_device — device iterator
int class_for_each_device ( | struct class * | class, |
| void * | data, | |
| int (* | fn(struct device *, void *)); |
classthe class we're iterating
datadata for the callback
fnfunction to be called for each device
Iterate over class's list of devices, and call fn for each,
passing it data.
We check the return of fn each time. If it returns anything
other than 0, we break out and return that value.
Note, we hold class->sem in this function, so it can not be
re-acquired in fn, otherwise it will self-deadlocking. For
example, calls to add or remove class members would be verboten.