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other versions
- jessie 3.16.56-1+deb8u1
CLASS_FIND_DEVICE(9) | Device drivers infrastructure | CLASS_FIND_DEVICE(9) |
NAME¶
class_find_device - device iterator for locating a particular deviceSYNOPSIS¶
struct device *
class_find_device(struct class * class,
struct device * start,
const void * data,
int (*match) (struct device *, const void *));
ARGUMENTS¶
classthe 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. fn is allowed to do anything including calling back into class code. There's no locking restriction.COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |