class_find_device — device iterator for locating a particular device
struct device * class_find_device ( | struct class * | class, |
| void * | data, | |
| int (* | match(struct device *, void *)); |
classthe class we're iterating
datadata for the match function
matchfunction 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.
We hold class->sem in this function, so it can not be
re-acquired in match, otherwise it will self-deadlocking. For
example, calls to add or remove class members would be verboten.