device_schedule_call(9)
NAME
device_schedule_callback_owner - helper to schedule a callback for a
device
SYNOPSIS
int device_schedule_callback_owner(struct device * dev,
void (*func) (struct device *),
struct module * owner);
ARGUMENTS
- dev
- device.
- func
- callback function to invoke later.
- owner
- module owning the callback routine
DESCRIPTION
Attribute methods must not unregister themselves or their parent device
(which would amount to the same thing). Attempts to do so will
deadlock, since unregistration is mutually exclusive with driver
callbacks.
Instead methods can call this routine, which will attempt to allocate
and schedule a workqueue request to call back func with dev as its
argument in the workqueue´s process context. dev will be pinned until
func returns.
This routine is usually called via the inline device_schedule_callback,
which automatically sets owner to THIS_MODULE.
Returns 0 if the request was submitted, -ENOMEM if storage could not be
allocated, -ENODEV if a reference to owner isn´t available.
NOTE
This routine won´t work if CONFIG_SYSFS isn´t set! It uses an
underlying sysfs routine (since it is intended for use by attribute
methods), and if sysfs isn´t available you´ll get nothing but -ENOSYS.