BUS_FOR_EACH_DEV(9) Device drivers infrastructure BUS_FOR_EACH_DEV(9)NAMEbus_for_each_dev - device iterator.
int bus_for_each_dev(struct bus_type * bus, struct device * start,
void * data, int (*fn) (struct device *, void *));
device to start iterating from.
data for the callback.
function to be called for each device.
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.
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
COPYRIGHTKernel Hackers Manual 3.8. June 2014 BUS_FOR_EACH_DEV(9)