pm_send

Section: Kernel Hacker's Manual (9)
Updated: pm_send
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NAME

pm_send - send request to a single device

SYNOPSIS

int pm_send (struct pm_dev *dev, pm_request_t rqst, void *data);

ARGUMENTS

dev: device to send to
rqst: power management request
data: data for the callback

DESCRIPTION

Issue a power management request to a given device. The PM_SUSPEND and PM_RESUME events are handled specially. The data field must hold the intended next state. No call is made if the state matches.

BUGS

what stops two power management requests occuring in parallel and conflicting.

WARNING

Calling pm_send directly is not generally recommended, in paticular there is no locking against the pm_dev going away. The caller must maintain all needed locking or have 'inside knowledge' on the safety. Also remember that this function is not locked against pm_unregister. This means that you must handle SMP races on callback execution and unload yourself.

This document was created by man2html, using the manual pages.
Time: 03:55:31 GMT, June 12, 2005