Name
bus_for_each_dev —
device iterator.
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.