.\" 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 "DEVICE_SUSPEND" "" "06 October 2005" "" ""

.SH NAME
device_suspend \- Save state and stop all devices in system.
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
int device_suspend  (u32 \fIstate\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIstate\fB\fR
Power state to put each device in. 
.SH "DESCRIPTION"
.PP
Walk the dpm_active list, call ->\fBsuspend\fR for each device, and move
it to dpm_off. 
Check the return value for each. If it returns 0, then we move the
the device to the dpm_off list. If it returns -EAGAIN, we move it to 
the dpm_off_irq list. If we get a different error, try and back out. 
.PP
If we hit a failure with any of the devices, call \fBdevice_resume\fR
above to bring the suspended devices back to life. 
.PP
Note this function leaves dpm_sem held to
a) block other devices from registering.
b) prevent other PM operations from happening after we've begun.
c) make sure we're exclusive when we disable interrupts.