.\" This documentation was generated from the book titled "The Linux Kernel API", which is part of the Linux kernel source.
.\" 
.\" This documentation comes with the following legal notice:
.\" 
.\"     This documentation is free software; you can redistribute
.\"     it and/or modify it under the terms of the GNU General Public
.\"     License as published by the Free Software Foundation; either
.\"     version 2 of the License, or (at your option) any later
.\"     version.
.\" 
.\"     This program is distributed in the hope that it will be
.\"     useful, but WITHOUT ANY WARRANTY; without even the implied
.\"     warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
.\"     See the GNU General Public License for more details.
.\" 
.\"     You should have received a copy of the GNU General Public
.\"     License along with this program; if not, write to the Free
.\"     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
.\"     MA 02111-1307 USA
.\" 
.\"     For more details see the file COPYING in the source
.\"     distribution of Linux.
.\" 
.\" For comments on the formatting of this manpage, please contact Michael Still <mikal@stillhq.com>

.\" This manpage has been automatically generated by docbook2man 
.\" from a DocBook document.  This tool can be found at:
.\" <http://shell.ipoline.com/~elmert/comp/docbook2X/> 
.\" Please send any bug reports, improvements, comments, patches, 
.\" etc. to Steve Cheng <steve@ggi-project.org>.
.TH "PM_SEND_ALL" "9" "07 August 2003" "" ""

.SH NAME
pm_send_all \- send request to all managed devices
.SH SYNOPSIS
.sp
\fB
.sp
int pm_send_all  (pm_request_t \fIrqst\fB, void * \fIdata\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIrqst\fB\fR
power management request
.TP
\fB\fIdata\fB\fR
data for the callback
.SH "DESCRIPTION"
.PP
Issue a power management request to a all devices. The 
PM_SUSPEND events are handled specially. Any device is 
permitted to fail a suspend by returning a non zero (error)
value from its callback function. If any device vetoes a 
suspend request then all other devices that have suspended 
during the processing of this request are restored to their
previous state.
.SH "WARNING"
.PP
This function takes the pm_devs_lock. The lock is not dropped until
the callbacks have completed. This prevents races against pm locking
functions, races against module unload pm_unregister code. It does
mean however that you must not issue pm_ functions within the callback
or you will deadlock and users will hate you.
.PP
Zero is returned on success. If a suspend fails then the status
from the device that vetoes the suspend is returned.
.SH "BUGS"
.PP
what stops two power management requests occurring in parallel
and conflicting.
.SH "ABOUT THIS DOCUMENT"
.PP
This documentation was generated with kernel version 2.6.0.