BUS_FOR_EACH_DEV(9) Device drivers infrastructure BUS_FOR_EACH_DEV(9)
NAME
bus_for_each_dev - device iterator.
SYNOPSIS
int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, int (*fn) (struct device *, void *));
ARGUMENTS
bus
bus type.
start
device to start iterating from.
data
data for the callback.
fn
function to be called for each device.
DESCRIPTION
Iterate over bus's list of devices, and call fn for each, passing it data. If start is not NULL, we use that device to begin iterating
from.
We check the return of fn each time. If it returns anything other than 0, we break out and return that value.
NOTE
The device that returns a non-zero value is not retained in any way, nor is its refcount incremented. If the caller needs to retain this
data, it should do so, and increment the reference count in the supplied callback.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 BUS_FOR_EACH_DEV(9)
