kernel-ark/drivers/base/power/shutdown.c
Adrian Bunk f67d115fe4 [PATCH] drivers/base/: proper prototypes
This patch contains the following changes:
- move prototypes to base.h
- sys.c should #include "base.h" for getting the prototype of it's
  global function system_bus_init()

Note that hidden in this patch there's a bugfix:

Caller and callee disagreed regarding the return type of
sysdev_shutdown().

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-02-06 12:17:17 -08:00

56 lines
1.3 KiB
C

/*
* shutdown.c - power management functions for the device tree.
*
* Copyright (c) 2002-3 Patrick Mochel
* 2002-3 Open Source Development Lab
*
* This file is released under the GPLv2
*
*/
#include <linux/config.h>
#include <linux/device.h>
#include <asm/semaphore.h>
#include "../base.h"
#include "power.h"
#define to_dev(node) container_of(node, struct device, kobj.entry)
extern struct subsystem devices_subsys;
/**
* We handle system devices differently - we suspend and shut them
* down last and resume them first. That way, we don't do anything stupid like
* shutting down the interrupt controller before any devices..
*
* Note that there are not different stages for power management calls -
* they only get one called once when interrupts are disabled.
*/
/**
* device_shutdown - call ->shutdown() on each device to shutdown.
*/
void device_shutdown(void)
{
struct device * dev, *devn;
down_write(&devices_subsys.rwsem);
list_for_each_entry_safe_reverse(dev, devn, &devices_subsys.kset.list,
kobj.entry) {
if (dev->bus && dev->bus->shutdown) {
dev_dbg(dev, "shutdown\n");
dev->bus->shutdown(dev);
} else if (dev->driver && dev->driver->shutdown) {
dev_dbg(dev, "shutdown\n");
dev->driver->shutdown(dev);
}
}
up_write(&devices_subsys.rwsem);
sysdev_shutdown();
}